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US20070135386A1 - Novel Compounds and Compositions as Cathepsin Inhibitors - Google Patents

Novel Compounds and Compositions as Cathepsin Inhibitors Download PDF

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Publication number
US20070135386A1
US20070135386A1 US11/625,369 US62536907A US2007135386A1 US 20070135386 A1 US20070135386 A1 US 20070135386A1 US 62536907 A US62536907 A US 62536907A US 2007135386 A1 US2007135386 A1 US 2007135386A1
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Prior art keywords
alkyl
hetero
aryl
cycloalkyl
halo
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US11/625,369
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Michael Graupe
James Palmer
David Aldous
Sukanthini Thurairatnam
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Axys Pharmaceuticals Inc
Aventis Pharmaceuticals Inc
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Axys Pharmaceuticals Inc
Aventis Pharmaceuticals Inc
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Priority to US11/625,369 priority Critical patent/US20070135386A1/en
Assigned to AXYS PHARMACEUTICALS, INC. reassignment AXYS PHARMACEUTICALS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GRAUPE, MICHAEL, PALMER, JAMES T.
Assigned to AVENTIS PHARMACEUTICALS INC. reassignment AVENTIS PHARMACEUTICALS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALDOUS, DAVID JOHN, THURAIRATNAM, SUKANTHINI
Publication of US20070135386A1 publication Critical patent/US20070135386A1/en
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
    • C07D295/16—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms acylated on ring nitrogen atoms
    • C07D295/20—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms acylated on ring nitrogen atoms by radicals derived from carbonic acid, or sulfur or nitrogen analogues thereof
    • C07D295/215—Radicals derived from nitrogen analogues of carbonic acid
    • A—HUMAN NECESSITIES
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    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/02—Stomatological preparations, e.g. drugs for caries, aphtae, periodontitis
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    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00—Drugs for disorders of the urinary system
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P21/00—Drugs for disorders of the muscular or neuromuscular system
    • A61P21/04—Drugs for disorders of the muscular or neuromuscular system for myasthenia gravis
    • A—HUMAN NECESSITIES
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    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
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    • A61P33/06—Antimalarials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C317/00—Sulfones; Sulfoxides
    • C07C317/44—Sulfones; Sulfoxides having sulfone or sulfoxide groups and carboxyl groups bound to the same carbon skeleton
    • C07C317/48—Sulfones; Sulfoxides having sulfone or sulfoxide groups and carboxyl groups bound to the same carbon skeleton the carbon skeleton being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C317/00—Sulfones; Sulfoxides
    • C07C317/44—Sulfones; Sulfoxides having sulfone or sulfoxide groups and carboxyl groups bound to the same carbon skeleton
    • C07C317/48—Sulfones; Sulfoxides having sulfone or sulfoxide groups and carboxyl groups bound to the same carbon skeleton the carbon skeleton being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups
    • C07C317/50—Sulfones; Sulfoxides having sulfone or sulfoxide groups and carboxyl groups bound to the same carbon skeleton the carbon skeleton being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups at least one of the nitrogen atoms being part of any of the groups, X being a hetero atom, Y being any atom
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D205/00—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom
    • C07D205/02—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings
    • C07D205/06—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D205/08—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams
    • C07D205/085—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams with a nitrogen atom directly attached in position 3
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    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
    • C07D207/22—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D207/24—Oxygen or sulfur atoms
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    • C07D207/46—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with hetero atoms directly attached to the ring nitrogen atom
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    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D223/00—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom
    • C07D223/02—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings
    • C07D223/06—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D223/12—Nitrogen atoms not forming part of a nitro radical
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    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/26—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D307/30—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D307/32—Oxygen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
    • C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
    • C07K5/06—Dipeptides
    • C07K5/06008—Dipeptides with the first amino acid being neutral
    • C07K5/06017—Dipeptides with the first amino acid being neutral and aliphatic
    • C07K5/0606—Dipeptides with the first amino acid being neutral and aliphatic the side chain containing heteroatoms not provided for by C07K5/06086 - C07K5/06139, e.g. Ser, Met, Cys, Thr
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
    • C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
    • C07K5/06—Dipeptides
    • C07K5/06008—Dipeptides with the first amino acid being neutral
    • C07K5/06078—Dipeptides with the first amino acid being neutral and aromatic or cycloaliphatic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Definitions

  • This Application relates to compounds and compositions for treating diseases associated with cysteine protease activity, particularly diseases associated with activity of cathepsin S.
  • Cysteine proteases represent a class of peptidases characterized by the presence of a cysteine residue in the catalytic site of the enzyme. Cysteine proteases are associated with the normal degradation and processing of proteins. The aberrant activity of cysteine proteases, e.g., as a result of increase expression or enhanced activation, however, may have pathological consequences. In this regard, certain cysteine proteases are associated with a number of disease states, including arthritis, muscular dystrophy, inflammation, tumor invasion, glomerulonephritis, malaria, periodontal disease, metachromatic leukodystrophy and others. An increase in cathepsin S activity contributes to the pathology and/or symptomatology of a number of diseases. Accordingly, molecules that inhibit the activity of cathepsin S protease are useful as therapeutic agents in the treatment of such diseases.
  • X 1 and X 2 are both methylene or X 1 is ethylene and X 2 is a bond;
  • R 3 is —CR 5 ⁇ CHR 6 , —CR 5 (CR 6 3 ) 2 or —CR 7 ⁇ NR 8 , wherein R 5 is hydrogen and R 6 is hydrogen or (C 1-4 )alkyl or R 5 and R 6 together with the atoms to which R 5 and R 6 are attached form (C 3-12 )cycloalkenyl, hetero(C 5-12 )cycloalkenyl, (C 6-12 )aryl, hetero(C 6-12 )aryl, (C 9-12 )bicycloaryl or hetero(C 8-12 )bicycloaryl and R 7 and R 8 together with the atoms to which R 7 and R 8 are attached form hetero(C 5-12 )cycloalkenyl, hetero(C 6-12 )aryl or hetero(C 8-12 )bicycloaryl, wherein R 3 optionally is substituted by 1 to 5 radicals independently selected from a group consisting of (C 1-4 )alkyl, cyano, halo, halo-
  • R 4 is —C(O)X 5 R 11 or —S(O) 2 X 5 R 11 , wherein X 5 is a bond, —O— or —NR 12 —, wherein R 12 is hydrogen or (C 1-6 )alkyl, and R 11 is (i) (C 1-6 )alkyl optionally substituted by —OR 13 , —SR 13 , —S(O)R 13 , —S(O) 2 R 13 , —C(O)R 13 , —C(O)OR 13 , —C(O)NR 13 R 14 , —NR 13 R 14 , —NR 14 C(O)R 13 , —NR 14 C(O)OR 13 , —NR 14 C(O)NR 13 R 14 or —NR 14 C(NR 14 )NR 13 R 14 , wherein R 13 is (C 3-12 )cycloalkyl(C 0-3 )alkyl, hetero(C 5-12 )cycloalkyl(
  • X 3 is a group of Formula (a), (b), (c), (d), (e), (f), (g) or (h):
  • X 7 represents aryl, heteroaryl or NR 20 R 25 ;
  • n 0, 1 or 2;
  • R 20 is selected from tie group consisting of hydrogen, (C 1-6 )alkyl, (C 3-12 )cycloalkyl(C 0-6 )alkyl, hetero(C 5-12 )cycloalkyl(C 0-6 )alkyl, (C 6-12 )aryl(C 0-6 )alkyl and hetero(C 5-12 )aryl(C 0-6 )alkyl;
  • R 21 is selected from the group consisting of hydrogen, (C 1-9 )alkyl, (C 3-12 )cycloalkyl(C 0-6 )alkyl, hetero(C 5-12 )cycloalkyl(C 0-6 )alkyl, (C 6-12 )aryl(C 0-6 )alkyl, hetero(C 5-12 )aryl(C 0-6 )alkyl, (C 9-12 )bicycloaryl(C 0-3 )alkyl, hetero(C 8-12 )-bicycloaryl(C 0-3 )alkyl, —C(O)R 26 , —C(S)R 26 , —S(O) 2 R 26 , —C(O)OR 26 , —C(O)N(R 26 )R 27 , —C(S)N(R 26 )R 27 and —S(O) 2 N(R 27 )R 26 ;
  • R 23 is selected from —H, (C 1-6 )alkyl, (C 4-6 )alkenyl, (C 3-12 )cycloalkyl(C 0-6 )alkyl, hetero(C 5-12 )cycloalkyl(C 0-6 )alkyl, (C 6-12 )aryl(C 0-6 )alkyl or hetero(C 5-12 )aryl(C 0-6 )alkyl optionally substituted with amino, —NHC(O)R 15 or —R 15 wherein R 15 is as described above;
  • R 25 is selected from hydrogen, (C 1-6 )alkyl, (C 3-12 )cycloalkyl(C 0-6 )alkyl, hetero(C 5-12 )cycloalkyl(C 0-6 )alkyl, (C 6-12 )aryl(C 0-6 )alkyl, hetero(C 5-13 )aryl(C 0-6 )alkyl, —X 4 NHR 15 , —X 4 S(O) 2 R 26 or —X 4 C(O)R 17 NR 17 C(O)R 17 wherein R 15 , R 17 and X 4 are as described above;
  • R 26 is selected from the group consisting of hydrogen, (C 1-6 )alkyl, (C 3-12 )cycloalkyl(C 0-6 )alkyl, hetero(C 5-12 )cycloalkyl(C 0-6 )alkyl, (C 6-12 )aryl(C 0-6 )alkyl, hetero(C 5-12 )aryl(C 0-6 )alkyl, (C 9-12 )bicycloaryl(C 0-3 )alkyl and hetero(C 8-12 )-bicycloaryl(C 0-3 )alkyl;
  • R 27 is hydrogen, (C 1-6 )alkyl, (C 3-12 )cycloalkyl(C 0-6 )alkyl, hetero(C 5-12 )cycloalkyl(C 0-6 )alkyl, (C 6-12 )aryl(C 0-6 )alkyl or hetero(C 5-12 )aryl(C 0-6 )alkyl;
  • R 28 is R 20 or —O—C( ⁇ O)—R 29 ;
  • R 29 is (C 1-6 )alkyl, (C 3-12 )cycloalkyl(C 0-3 )alkyl, hetero(C 5-12 )cycloalkyl(C 0-3 )alkyl, (C 6-12 )aryl(C 0-3 )alkyl, hetero(C 5-12 )aryl(C 0-3 )alkyl, (C 9-12 )bicycloaryl(C 0-3 )alkyl or hetero(C 8-12 )bicycloaryl(C 0-3 )alkyl;
  • a second aspect of the invention is a pharmaceutical composition that contains a compound of Formula I or their N-oxide derivatives, individual isomers or mixture of isomers thereof, or pharmaceutically acceptable salts thereof, in admixture with one or more suitable excipients.
  • a third aspect of the invention is a method for treating a disease in an animal in which inhibition of cathepsin S can prevent, inhibit or ameliorate the pathology and/or symptomatology of the disease, which method comprises administering to the animal a therapeutically effective amount of compound of Formula I or a N-oxide derivative, individual isomer or mixture of isomers thereof; or a pharmaceutically acceptable salt thereof.
  • a fourth aspect of the invention is the processes for preparing compounds of Formula I and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof; and the pharmaceutically acceptable salts thereof.
  • Alicyclic means a moiety characterized by arrangement of the carbon atoms in closed non-aromatic ring structures having properties resembling those of aliphatics and may be saturated or partially unsaturated with two or more double or triple bonds.
  • “Aliphatic” means a moiety characterized by a straight or branched chain arrangement of the constituent carbon atoms and may be saturated or partially unsaturated with two or more double or triple bonds.
  • Alkyl represented by itself means a straight or branched, saturated or unsaturated, aliphatic radical having the number of carbon atoms indicated (e.g., (C 1-6 )alkyl includes methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, isobutyl, tert-butyl, vinyl, allyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 2-methylallyl, ethynyl, 1-propynyl, 2-propynyl, and the like).
  • Alkyl represented along with another radical means a straight or branched, saturated or unsaturated aliphatic divalent radical having the number of atoms indicated or when no atoms are indicated means a bond (e.g., (C 6-10 )aryl(C 0-3 )alkyl includes phenyl, benzyl, phenethyl, 1-phenylethyl 3-phenylpropyl, and the like).
  • Alkylene unless indicated otherwise, means a straight or branched, saturated or unsaturated, aliphatic, divalent radical having the number of carbon atoms indicated (e.g., (C 1-6 )alkylene includes methylene (—CH 2 —), ethylene (—CH 2 CH 2 —), trimethylene (—CH 2 CH 2 CH 2 —), tetramethylene (—CH 2 CH 2 CH 2 CH 2 —) 2-butenylene (—CH 2 CH ⁇ CHCH 2 —), 2-methyltetramethylene (—CH 2 CH(CH 3 )CH 2 CH 2 —), pentamethylene (—CH 2 CH 2 CH 2 CH 2 CH 2 —) and the like).
  • Alkylidene means a straight or branched saturated or unsaturated, aliphatic, divalent radical having the number of carbon atoms indicated (e.g. (C 1-6 )alkylidene includes methylene ( ⁇ CH 2 ), ethylidene ( ⁇ CHCH 3 ), isopropylidene ( ⁇ C(CH 3 ) 2 ), propylidene ( ⁇ CHCH 2 CH 3 ), allylidene ( ⁇ CH—CH ⁇ CH 2 ), and the like).
  • amino means the radical —NH 2 .
  • the compounds of the invention containing amino moieties include protected derivatives thereof. Suitable protecting groups for amino moieties include acetyl, tert-butoxycarbonyl, benzyloxycarbonyl, and the like.
  • Animal includes humans, non-human mammals (e.g., dogs, cats, rabbits, cattle, horses, sheep, goats, swine, deer, and the like) and non-mammals (e.g., birds, and the like).
  • non-human mammals e.g., dogs, cats, rabbits, cattle, horses, sheep, goats, swine, deer, and the like
  • non-mammals e.g., birds, and the like.
  • “Aromatic” means a moiety wherein the constituent atoms make up an unsaturated ring system, all atoms in the ring system are Sp 2 hybridized and the total number of pi electrons is equal to 4n+2.
  • Aryl means a monocyclic or fused bicyclic ring assembly containing the total number of ring carbon atoms indicated, wherein each ring is comprised of 6 ring carbon atoms and is aromatic or when fused with a second ring forms an aromatic ring assembly.
  • optionally substituted (C 6-10 )aryl as used in this Application includes, but is not limited to, biphenyl-2-yl, 2-bromophenyl, 2-bromocarbonylphenyl, 2-bromo-5-fluorophenyl, 4-tert-butylphenyl, 4-carbamoylphenyl, 4-carboxy-2-nitrophenyl, 2-chlorophenyl, 4-chlorophenyl, 3-chlorocarbonylphenyl, 4-chlorocarbonylphenyl, 2-chloro-4-fluorophenyl, 2-chloro-6-fluorophenyl, 4-chloro-2-nitrophenyl, 6-chloro-2-nitrophenyl, 2,6-dibromophenyl, 2,3-dichlorophenyl, 2,5-dichlorophenyl, 3,4-dichlorophenyl, 2-difluoromethoxyphenyl, 3,5-dimethylphenyl, 2-(2-
  • Optionally substituted (C 6-10 )aryl as used in this Application includes 3-acetylphenyl, 3-tert-butoxycarbonylaminomethylphenyl, biphenyl-4-yl, 3-hydroxyphenyl, 4-hydroxyphenyl, 3-methoxyphenyl, naphth-2-yl, 3-phenoxyphenyl, phenyl, and the like.
  • “Bicycloaryl” means a bicyclic ring assembly containing the number of ring carbon atoms indicated, wherein the rings are linked by a single bond or fused and at least one of the rings comprising the assembly is aromatic, and any carbocyclic ketone, thioketone or iminoketone derivative thereof (e.g., (C 9-10 )bicycloaryl includes cyclohexylphenyl, 1,2-dihydronaphthyl, 2,4-dioxo-1,2,3,4-tetrahydronaphthyl, indanyl, indenyl, 1,2,3,4-tetrahydronaphthyl, and the like).
  • Carbamoyl means the radical —C(O)NH 2 . Unless indicated otherwise, the compounds of the invention containing carbamoyl moieties include protected derivatives thereof. Suitable protecting groups for carbamoyl moieties include acetyl, tert-butoxycarbonyl, benzyloxycarbonyl, and the like and both the unprotected and protected derivatives fall within the scope of the invention.
  • Carbocyclic ketone derivative means a derivative containing the moiety —C(O)—.
  • Carboxy means the radical —C(O)OH. Unless indicated otherwise, the compounds of the invention containing carboxy moieties include protected derivatives thereof. Suitable protecting groups for carboxy moieties include benzyl, tert-butyl, and the like.
  • Cycloalkyl means a saturated or partially unsaturated, monocyclic, fused bicyclic or bridged polycyclic ring assembly containing the number of ring carbon atoms indicated, and any carbocyclic ketone, thioketone or iminoketone derivative thereof (e.g., (C 3-10 )cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclohexenyl, 2,5-cyclohexadienyl, bicyclo[2.2.2]octyl, adamantan-1-yl, decahydronaphthyl, oxocyclohexyl, dioxocyclohexyl, thiocyclohexyl, 2-oxobicyclo[2.2.1]hept-1-yl, and the like).
  • Cycloalkylene means a divalent saturated or partially unsaturated, monocyclic ring or bridged polycyclic ring assembly containing the number of ring carbon atoms indicated, and any carbocyclic ketone, thioketone or iminoketone derivative thereof.
  • R 1 and R 2 together with the carbon atom to which both R 1 and R 2 are attached form (C 3-8 )cycloalkylene includes, but is not limited to, the following:
  • Disease specifically includes any unhealthy condition of an animal orpart thereof and includes an unhealthy condition that may be caused by, or incident to, medical or veterinary therapy applied to that animal, i.e., the “side effects” of such therapy.
  • Halo means fluoro, chloro, bromo or iodo.
  • Halo-substituted alkyl as an isolated group or part of a larger group, means “alkyl” substituted by one or more “halo” atoms, as such terms are defined in this Application.
  • Halo-substituted alkyl includes haloalkyl, dihaloalkyl, trihaloalkyl, perhaloalkyl and the like (e.g. halo-substituted (C 1-3 )alkyl includes chloromethyl, dichloromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trifluoroethyl, perfluoroethyl, 2,2,2-trifluoro-1,1-dichloroethyl, and the like).
  • Heteroatom moiety includes —N ⁇ , —NR—, —N + (O ⁇ ) ⁇ , —O—; —S— or —S(O) 2 —, wherein R is hydrogen, (C 1-6 )alkyl or a protecting group.
  • Heterocycloalkylene means cycloalkylene, as defined in this Application, provided that one or more of the ring member carbon atoms indicated, is replaced by heteroatom moiety selected from —N ⁇ , —NR—, —O—, —S— or —S(O) 2 —, wherein R is hydrogen or (C 1-6 )alkyl.
  • R 1 and R 2 together with the carbon atom to which both R 1 and R 2 are attached form hetero(C 3-8 )cycloalkylene includes, but is not limited to, the following: in which R is hydrogen, (C 1-6 )alkyl, or a protecting group.
  • Heteroaryl means aryl, as defined in this Application, provided that one or more of the ring carbon atoms indicated are replaced by a heteroatom moiety selected from —N ⁇ , —NR—, —N + (O ⁇ ) ⁇ , —O— or —S—, wherein R is hydrogen, (C 1-6 )alkyl, a protecting group or represents the free valence which serves as the point of attachment to a ring nitrogen, and each ring is comprised of 5 or 6 ring atoms.
  • optionally substituted hetero(C 5-13 )aryl as used in this Application includes, but is not limited to, 4-amino-2-hydroxypyrimidin-5-yl, dibenzofuranyl, benzothiazol-2-yl, 1H-benzoimidazol-2-yl, 2-bromopyrid-5-yl, 5-bromopyrid-2-yl, 4-carbamoylthiazol-2-yl, 3-carboxypyrid-4-yl, 5-carboxy-2,6-dimethylpyrid-3-yl, 3,5-dimethylisoxazol-4-yl, 5-ethoxy-2,6-dimethylpyrid-3-yl, 5-fluoro-6-hydroxypyrimidin-4-yl, fur-2-yl, fur-3-yl, 5-hydroxy-4,6-dimethylpyrid-3-yl, 8-hydroxy-5,7-dimethylquinolin-2-yl, 5-hydroxymethylisoxazol-3-yl, 3-
  • Suitable protecting groups include tert-butoxycarbonyl, benzyloxycarbonyl, benzyl, 4-methoxybenzyl, 2-nitrobenzyl, and the like.
  • Optionally substituted hetero(C 5-10 )aryl as used in this Application to define R 4 includes benzofur-2-yl, fur-2-yl, fur-3-yl, pyrid-3-yl, pyrid-4-yl, quinol-2-yl, quinol-3-yl, thien-2-yl, thien-3-yl, and the like.
  • Heterobicycloaryl means bicycloaryl, as defined in this Application, provided that one or more of the ring carbon atoms indicated are replaced by a heteroatom moiety selected from —N ⁇ , —NR—, —O— or —S—, wherein R is hydrogen, (C 1-6 )alkyl, a protecting group or represents the free valence which serves as the point of attachment to a ring nitrogen, and any carbocyclic ketone, thioketone or iminoketone derivative thereof.
  • optionally substituted hetero(C 8-10 )bicycloaryl as used in this Application includes, but is not limited to, 2-amino-4-oxo-3,4-dihydropteridin-6-yl, and the like.
  • heterobicycloaryl as used in this Application includes, for example, benzo[1,3]dioxol-5-yl, 3,4-dihydro-2H-[1,8]naphthyridinyl, 3,4-dihydro-2H-quinolinyl, 2,4-dioxo-3,4-dihydro-2H-quinazolinyl, 1,2,3,4,5,6-hexahydro[2,2′]bipyridinylyl, 3-oxo-2,3-dihydrobenzo[1,4]oxazinyl, 5,6,7,8-tetrahydroquinolinyl, and the like.
  • Heterocycloalkyl means cycloalkyl, as defined in this Application, provided that one or more of the ring carbon atoms indicated are replaced by a heteroatom moiety selected from —N ⁇ , —NR—, —O— or —S—, wherein R is hydrogen, (C 1-6 )alkyl, a protecting group or represents the free valence which serves as the point of attachment to a ring nitrogen, and any carbocyclic ketone, thioketone or iminoketone derivative thereof (e.g., the term hetero(C 5-10 )cycloalkyl includes imidazolidinyl, morpholinyl, piperazinyl, piperidyl, pyrrolidinyl, pyrrolinyl, quinuclidinyl, and the like).
  • Suitable protecting groups include tert-butoxycarbonyl, benzyloxycarbonyl, benzyl, 4-methoxybenzyl, 2-nitrobenzyl, and the like. Both the unprotected and protected derivatives fall within the scope of the invention.
  • “Hydroxy” means the radical —OH. Unless indicated otherwise, the compounds of the invention containing hydroxy radicals include protected derivatives thereof. Suitable protecting groups for hydroxy moieties include benzyl and the like.
  • Iminoketone derivative means a derivative containing the moiety —C(NR)—, wherein R is hydrogen or (C 1-6 )alkyl.
  • “Isomers” mean compounds of Formula I having identical molecular formulae but differ in the nature or sequence of bonding of their atoms or in the arrangement of their atoms in space. Isomers that differ in the arrangement of their atoms in space are termed “stereoisomers”. Stereoisomers that are not mirror images of one another are termed “diastereomers” and stereoisomers that are nonsuperimposable mirror images are termed “enantiomers” or sometimes “opfical isomers”. A carbon atom bonded to four nonidentical substituents is termed a “chiral center”. A compound with one chiral center has two enantiomeric forms of opposite chirality is termed a “racemic mixture”.
  • a compound that has more than one chiral center has 2 n ⁇ 1 enantiomeric pairs, whereAn is the number of chiral centers.
  • Compounds with more than one chiral center may exist as -ether an individual diastereomers or as a mixture of diastereomers, termed a “diastereomeric mixture”.
  • a stereoisomer may be characterized by the absolute configuration of that chiral center. Absolute configuration refers to the arrangement in space of the substituents attached to the chiral center.
  • Enanfiomers are characterized by the absolute configuration of their chiral centers and described by the R- and S-sequencing rules of Cahn, Ingold and Prelog.
  • morpholine-4-carboxylic acid [1(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide is meant to include morpholine-4-carboxylic acid [S-1-(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide and morpholine-4-carboxylic acid [R-1-(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide and any mixture, racemic or otherwise, thereof.
  • Ketone derivative means a derivative containing the moiety —C(O)—.
  • the “carbocyclic ketone derivative” would be 2-acetoxy-4-oxo-azetidin-3-yl.
  • Niro means the radical —NO 2 .
  • Oxoalkyl means alkyl, as defined above, wherein one of the number of carbon atoms indicated is replaced by an oxygen group (—O—), e.g., oxo(C 2-6 )alkyl includes methoxymethyl, etc.
  • N-oxide derivatives means derivatives of compounds of Formula I in which nitrogens are in an oxidized state (i.e., O—N) and which possess the desired pharmacological activity.
  • “Pathology” of a disease means the essential nature, causes and development of the disease as well as the structural and functional changes that result from the disease processes.
  • “Pharmaceutically acceptable” means that which is useful in preparing a pharmaceutical composition that is generally safe, non-toxic and neither biologically nor otherwise undesirable and includes that which is acceptable for veterinary use as well as human pharmaceutical use.
  • “Pharmaceutically acceptable salts” means salts of compounds of Formula I which are pharmaceutically acceptable, as defined above, and which possess the desired pharmacological activity. Such salts include acid addition salts formed with inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like; or with organic acids such as acetic acid, propionic acid, hexanoic acid, heptanoic acid, cyclopentanepropionic acid, glycolic acid, pyruvic acid, lactic acid, malonic acid, succinic acid, malic acid, maleic acid, fumaric acid, tartatic acid, citric acid, benzoic acid, o-(4-hydroxybenzoyl)benzoic acid, cinnamic acid, madelic acid, methanesulfonic acid, ethanesulfonic acid, 1,2-ethanedisulfonic acid, 2-hydroxyethanesulfonic acid, benzenesul
  • Pharmaceutically acceptable salts also include base addition salts which may be formed when acidic protons present are capable of reacting with inorganic or organic bases.
  • Acceptable inorganic bases include sodium hydroxide, sodium carbonate, potassium hydroxide, aluminum hydroxide and calcium hydroxide.
  • Acceptable organic bases include ethanolamine, diethanolamine, triethanolamine, tromethamine, N-methylglucamine and the like.
  • “Prodrug” means a compound which is convertible in vivo by metabolic means (e.g. by hydrolysis) to a compound of Formula I.
  • a compound of Formula I containing a hydroxy group may be convertible by hydrolysis in vivo to the parent molecule.
  • an ester of a compound of Formula I containing a carboxy group may be convertible by hydrolysis in vivo to the parent molecule.
  • Suitable esters of compounds of Formula I containing a hydroxy group are for example acetates, citrates, lactates, tartrates, malonates, oxalates, salicylates, propionates, succinates, fumarates, maleates, methylene-bis-b-hydroxynaphthoates, gentisates, isethionates, di-p-toluoyltartrates, methanesulphonates, ethanesulphonates, benzenesulphonates, p-toluenesulphonates, cyclohexylsulphamates and quinates.
  • esters of compounds of Formula I containing a carboxy group are for example those described by F. J. Leinweber, Drug Metab. Res., 1987, 18, page 379.
  • An especially useful class of esters of compounds of Formula I containing a hydroxy group may be formed from acid moieties selected from those described by Bundgaard et al., J. Med. Chem., 1989, 32, page 2503-2507, and include substituted (aminomethyl)-benzoates, for example, dialkylamino-methylbenzoates in which the two alkyl groups may be joined together and/or interrupted by an oxygen atom or by an optionally substituted nitrogen atom, e.g.
  • an alkylated nitrogen atom more especially (morpholino-methyl)benzoates, e.g. 3- or 4-(morpholinomethyl)-benzoates, and (4-alkylpiperazin-1-yl)benzoates, e.g. 3- or 4-(4-alkylpiperazin-1-yl)benzoates.
  • Protected derivatives means derivatives of compounds of Formula I in which a reactive site or sites are blocked with protecting groups.
  • Protected derivatives of compounds of Formula I are useful in the preparation of compounds of Formula I or in themselves may be active cathepsin S inhibitors. A comprehensive list of suitable protecting groups can be found in T. W. Greene, Protecting Groups in Organic Synthesis , 3rd edition, John Wiley & Sons, Inc. 1999.
  • “Therapeutically effective amount” means that amount which, when administered to an animal for treating a disease, is sufficient to effect such treatment for the disease.
  • Thioketone derivative means a derivative containing the moiety —C(S)—.
  • Treatment or “treating” means any administration of a compound of the present invention and includes:
  • the compounds of Formula I and the intermediates and starting materials used in their preparation are named in accordance with IUPAC rules of nomenclature in which the characteristic groups have decreasing priority for citation as the principle group as follows: acids, esters, amides, etc. Alternatively, the compounds are named by AutoNom 4.0 (Beilstein Information Systems, Inc.).
  • R 3 is —CR 5 ⁇ CHR 6 , —CR 5 (CR 6 3 ) 2 or —CR 7 ⁇ NR 8 , wherein R 5 is hydrogen and R 6 is hydrogen or (C 1-4 )alkyl or R 5 and R 6 together with the atoms to which R 5 and R 6 are attached form (C 3-12 )cycloalkenyl, (C 6-12 )aryl, hetero(C 6-12 )aryl or (C 9-12 )bicycloaryl and R 7 and R 8 together with the atoms to which R 7 and R 8 are attached form hetero(C 5-12 )cycloalkenyl or hetero(C 6-12 )aryl, wherein R 3 optionally is substituted by 1 to 5 radicals independently selected from
  • X 3 is a group of Formula (a), (b) or (c) in which: n is 0, 1 or 2; R 20 is selected from the group consisting of hydrogen and (C 1-6 )alkyl; R 21 is selected from the group consisting of (C 1-9 )alkyl, (C 6-12 )aryl(C 0-6 )alkyl, —C(O)R 26 , —S(O) 2 R 26 , —C(O)OR 26 and —C(O)N(R 26 )R 27 ; R 23 is selected from (C 1-6 )alkyl optionally substituted with amino, —NHC(O)R 15 or —R 15 wherein R 15 is as described above; R 25 is selected from (C 1-6 )alkyl, (C 6-12 )aryl(C 0-6 )alkyl, —X 4 S(O) 2 R 26 or —X 4 C(O)R 17 NR 17 C(O)R 17 wherein R 17 and
  • R 3 more preferably is selected from the group consisting of phenyl, pyridin-2-yl, pyridin-3-yl, pyridin-4-yl, vinyl, 2-difluoromethoxyphenyl, 1-oxy-pyridin-2-yl, 4-methoxyphenyl, 4-methylphenyl, 2-methylphenyl, 4-chlorophenyl, 3,5-dimethylphenyl, 4-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 2-bromophenyl, naphthalen-2-yl, 3,4-dichlorophenyl, 3-methylphenyl, 3-trifluoromethylphenyl, 3-trifluoromethoxyphenyl, 2,3,4,5,6-pentafluoro-phenyl, 2-fluorophenyl, 2-chlorophenyl, 2-cyano-phenyl, 2-trifluoromethylphenyl, 4-tert-butyl-phenyl, 3-chlorophenyl
  • R 4 more preferably is selected from the group consisting of benzoyl, morpholine-4-carbonyl, acetyl, furan-3-carbonyl, 2-methoxy-benzoyl, 3-methoxy-benzoyl, naphthalene-2-carbonyl, benzo[1,3]dioxole-5-carbonyl, 3-pyridin-3-yl-acryloyl, benzofuran-2-carbonyl, furan-2-carbonyl, tert-butoxy-carbonyl, biphenyl-4-carbonyl, quinoline-2-carbonyl, quinoline-3-carbonyl, 3-acetyl-benzoyl, 4-phenoxy-benzoyl, 3-hydroxy-benzoyl, 4-hydroxy-benzoyl, pyridine-3-carbonyl, 3-(tert-butoxycarbonylamino-methyl)-benzoyl, 4-carbonyl-piperazine-1-carboxylic acid tert-butyl ester,
  • X 3 more preferably is selected from a group consisting of 4-amino-3-oxo-azepane-1-carboxylic acid benzyl ester, 4-amino-3-oxo-azepane-1-carboxylic acid isobutyl ester, 4-amino-1-benzoyl-azepan-3-one, 4-amino-1-benzenesulfonyl-azepan-3-one, 4-amino-1-(pyridine-2-sulfonyl)-azepan-3-one, 4-amino-1-(1-oxy-pyridine-2-sulfonyl)-azepan-3-one, 4-amino-1-(3,4-dichloro-benzenesulfonyl)-azepan-3-one, 4-amino-1-(2-flouro-benzenesulfonyl)-azepan-3-one, 4-amino-1-(3,4-dimethoxy-benzenesulf
  • Particular compounds of the invention may be prepared by joining C* of one of the fragments (A1 to A72) shown in Table 1 to the nitrogen atom (*N) of one of the fragments (B1 to B80) shown in Table 2, and joining the methine carbon atom (CH*) of one of the fragments (B1 to B80) shown in Table 2 to the acyl carbon atom (C*) of one of the fragments (C1 to C37) depicted in Table 3.
  • the compounds of the invention are selective inhibitors of cathepsin S and, as such, are useful for treating diseases in which cathepsin S activity contributes to the pathology and/or symptomatology of the disease.
  • the compounds of the invention are useful in treating autoimmune disorders, including, but not limited to, juvenile onset diabetes, multiple sclerosis, pemphigus vulgaris, Graves' disease, myasthenia gravis, systemic lupus erythemotasus, rheumatoid arthritis and Hashimoto's thyroiditis, allergic disorders, including, but not limited to, asthma, and allogeneic immune responses, including, but not limited to, organ transplants or tissue grafts.
  • Cathepsin S also is implicated in disorders involving excessive elastolysis, such as chronic obstructive pulmonary disease (e.g., emphysema), bronchiolitis, excessive airway elastolysis in asthma and bronchitis, pneumonities and cardiovascular disease such as plaque rupture and atheroma.
  • Cathepsin S is implicated in fibril formation and, therefore, inhibitors of cathepsins S are of use in treatment of systemic amyloidosis.
  • cysteine protease inhibitory activities of the compounds of the invention can be determined by methods known to those of ordinary skill in the art. Suitable in vitro assays for measuring protease activity and the inhibition thereof by test compounds are known. Typically, the assay measures protease induced hydrolysis of a peptide based substrate. Details of assays for measuring protease inhibitory activity are set forth in Examples 14-17, infra.
  • compounds of Formula I will be administered in therapeutically effective amounts via any of the usual and acceptable modes known in the art, either singly or in combination with one or more therapeutic agents.
  • a therapeutically effective amount may vary widely depending on the severity of the disease, the age and relative health of the subject, the potency of the compound used and other factors.
  • therapeutically effective amounts of a compound of Formula I may range from about 1 micrograms per kilogram body weight ( ⁇ g/kg) per day to about 1 milligram per kilogram body weight (mg/kg) per day, typically from about 10 ⁇ g/kg/day to about 0.1 mg/kg/day.
  • a therapeutically effective amount for a 80 kg human patient may range from about 100 ⁇ g/day to about 100 mg/day, typically from about 1 ⁇ g/day to about 10 mg/day.
  • a therapeutically effective amount for a 80 kg human patient may range from about 100 ⁇ g/day to about 100 mg/day, typically from about 1 ⁇ g/day to about 10 mg/day.
  • compositions can take the form of tablets, pills, capsules, semisolids, powders, sustained release formulations, solutions, suspensions, elixirs, aerosols, or any other appropriate composition and are comprised of, in general, a compound of Formula I in combination with at least one pharmaceutically acceptable excipient.
  • Acceptable excipients are non-toxic, aid administration, and do not adversely affect the therapeutic benefit of the active ingredient.
  • excipient may be any solid, liquid, semisolid or, in the case of an aerosol composition, gaseous excipient that is generally available to one of skill in the art.
  • Solid pharmaceutical excipients include starch, cellulose, talc, glucose, lactose, sucrose, gelatin, malt, rice, flour, chalk, silica gel, magnesium stearate, sodium stearate, glycerol monostearate, sodium chloride, dried skim milk, and the like.
  • Liquid and semisolid excipients may be selected from water, ethanol, glycerol, propylene glycol and various oils, including those of petroleum, animal, vegetable or synthetic origin (e.g., peanut oil, soybean oil, mineral oil, sesame oil, and the like).
  • Preferred liquid carriers, particularly for injectable solutions include water, saline, aqueous dextrose and glycols.
  • a composition of a compound of Formula I for treating a given disease will comprise from 0.01% w to 10% w, preferably 0.3% w to 1% w, of active ingredient with the remainder being the excipient or excipients.
  • the pharmaceutical composition is administered in a single unit dosage form for continuous treatment or in a single unit dosage form ad libitum when relief of symptoms is specifically required.
  • Representative pharmaceutical formulations containing a compound of Formula I are described in Example 10, infra.
  • Compounds of Formula I can be prepared by condensing an acid of Formula 2 with an amino compound of formula (a).
  • the condensation reaction can be effected with an appropriate coupling agent (e.g., benzotriazol-1-yloxytrispyrrolidinophosphonium hexafluorophosphate (PyBOP®), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HBTU), 1,3-dicyclohexylcarbodiimide (DCC), or the like) and optionally an appropriate catalyst (e.g., 1-hydroxybenzotriazole (HOBt), 1-hydroxy-7-azabenzotriazole (HOAt), O-(7-azabenzotrizol-1-yl)-1,1,3,3, tetra-methyluroniumhex
  • An oxidation step can be carried out with an oxidizing agent (e.g., Oxone®, metachloroperbenzoic acid or the like) in a suitable solvent (e.g., methanol, water, or the like, or any suitable combination thereof) at ambient temperature and requires 16 to 24 hours to complete.
  • an oxidizing agent e.g., Oxone®, metachloroperbenzoic acid or the like
  • a suitable solvent e.g., methanol, water, or the like, or any suitable combination thereof
  • Compounds of Formula I can be prepared by condensing an acid of Formula 2 with an amino compound of formula (b).
  • the condensation reaction can be effected with an appropriate coupling agent (e.g., benzotriazol-1-yloxytrispyrrolidinophosphonium hexafluorophosphate (PyBOP®), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HBTU), 1,3-dicyclohexylcarbodiimide (DCC), or the like) and optionally an appropriate catalyst (e.g., 1-hydroxybenzotriazole (HOBt), 1-hydroxy-7-azabenzotriazole (HOAt), O-(7-azabenzotrizol-1-yl)-1,1,3,3, tetra-methyluroniumhex
  • An oxidation step can be carried out with an oxidizing agent (e.g., Oxone®, metachloroperbenzoic acid or the like) in a suitable solvent (e.g., methanol, water, or the like, or any suitable combination thereof at ambient temperature and requires 16 to 24 hours to complete.
  • an oxidizing agent e.g., Oxone®, metachloroperbenzoic acid or the like
  • a suitable solvent e.g., methanol, water, or the like, or any suitable combination thereof at ambient temperature and requires 16 to 24 hours to complete.
  • a compound of Formula I can be prepared as a pharmaceutically acceptable acid addition salt by reacting the free base form of the compound with a pharmaceutically acceptable inorganic or organic acid.
  • a pharmaceutically acceptable base addition salt of a compound of Formula I can be prepared by reacting the free acid form of the compound with a pharmaceutically acceptable inorganic or organic base.
  • Inorganic and organic acids and bases suitable for the preparation of the pharmaceutically acceptable salts of compounds of Formula I are set forth in the definitions section of this Application.
  • the salt forms of the compounds of Formula I can be prepared using salts of the starting materials or intermediates.
  • the free acid or free base forms of the compounds of Formula I can be prepared from the corresponding base addition salt or acid addition salt form.
  • a compound of Formula I in an acid addition salt form can be converted to the corresponding free base by treating with a suitable base (e.g., ammonium hydroxide solution, sodium hydroxide, and the like).
  • a suitable base e.g., ammonium hydroxide solution, sodium hydroxide, and the like.
  • a compound of Formula I in a base addition salt form can be converted to the corresponding free acid by treating with a suitable acid (e.g., hydrochloric acid, etc).
  • N-oxides of compounds of Formula I can be prepared by methods known to those of ordinary skill in the art.
  • N-oxides can be prepared by treating an unoxidized form of the compound of Formula I with an oxidizing agent (e.g., trifluoroperacetic acid, permaleic acid, perbenzoic acid, peracetic acid, meta-chloroperoxybenzoic acid, or the like) in a suitable inert organic solvent (e.g., a halogenated hydrocarbon such as dichloromethane) at approximately 0° C.
  • an oxidizing agent e.g., trifluoroperacetic acid, permaleic acid, perbenzoic acid, peracetic acid, meta-chloroperoxybenzoic acid, or the like
  • a suitable inert organic solvent e.g., a halogenated hydrocarbon such as dichloromethane
  • the N-oxides of the compounds of Formula I can be prepared from the N-oxide of an appropriate starting material.
  • Compounds of Formula I in unoxidized form can be prepared from N-oxides of compounds of Formula I by treating with a reducing agent (e.g., sulfur, sulfur dioxide, triphenyl phosphine, lithium borohydride, sodium borohydride, phosphorus trichloride, tribromide, or the like) in an suitable inert organic solvent (e.g., acetonitrile, ethanol, aqueous dioxane, or the like) at 0 to 80° C.
  • a reducing agent e.g., sulfur, sulfur dioxide, triphenyl phosphine, lithium borohydride, sodium borohydride, phosphorus trichloride, tribromide, or the like
  • an inert organic solvent e.g., acetonitrile, ethanol, aqueous dioxane, or the like
  • Prodrug derivatives of the compounds of Formula I can be prepared by methods known to those of ordinary skill in the art (e.g., for further details see Saulnier et al. (1994), Bioorganic and Medicinal Chemistry Letters , Vol. 4, p. 1985).
  • appropriate prodrugs can be prepared by reacting a non-derivatized compound of Formula I with a suitable carbamylating agent (e.g., 1,1-acyloxyalkylcarbonochloridate, para-nitrophenyl carbonate, or the like).
  • Protected derivatives of the compounds of Formula I can be made by means known to those of ordinary skill in the art. A detailed description of the techniques applicable to the creation of protecting groups and their removal can be found in T. W. Greene, Protecting Groups in Organic Synthesis , 3 rd edition, John Wiley & Sons, Inc. 1999.
  • Compounds of Formula I can be prepared as their individual stereoisomers by reacting a racemic mixture of the compound with an optically active resolving agent to form a pair of diastereoisomeric compounds, separating the diastereomers and recovering the optically pure enantiomer. While resolution of enantiomers can be carried out using covalent diasteromeric derivatives of compounds of Formula I, dissociable complexes are preferred (e.g., crystalline diastereoisomeric salts). Diastereomers have distinct physical properties (e.g., melting points, boiling points, solubilities, reactivity, etc.) and can be readily separated by taking advantage of these dissimilarities.
  • the diastereomers can be separated by chromatography or, preferably, by separation/resolution techniques based upon differences in solubility.
  • the optically pure enantiomer is then recovered, along with the resolving agent, by any practical means that would not result in racemization.
  • a more detailed description of the techniques applicable to the resolution of stereoisomers of compounds from their racemic mixture can be found in Jean Jacques Andre Collet, Samuel H. Wilen, Enantiomers, Racemates and Resolutions, John Wiley & Sons, Inc. (1981).
  • the present invention is further exemplified, but not limited by, the following examples that illustrate the preparation of compounds of Formula I (Examples) and intermediates (References) according to the invention.
  • 6-Oxa-3-aza-bicyclo[3.1.0]hexane-3-carboxylic acid tert-butyl ester (12.1 g, 65.3 mmol) was dissolved in a 8:1 methanol/water mixture (108 mL). Ammonium chloride (15 g) and sodium azide (21.4 g, 329 mmol) was added and the mixture was heated at 60° C. overnight. After dilution with ether (500 mL), the mixture was washed with saturated aqueous NaHCO 3 (200 mL) and brine (200 mL), dried with MgSO 4 and evaporated under vacuum. The crude product was dissolved in methanol (200 mL).
  • Morpholine-4-carboxylic acid [1-(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide
  • Morpholine-4-carboxylic acid [1-(4-hydroxy-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide TFA salt (215 mg, 0.39 mmol) was dissolved in 1,4-dioxane (20 mL). Saturated aqueous NaHCO 3 solution (10 mL) was added followed by benzoyl chloride (0.2 mL, 1.72 mmol). The mixture was stirred at ambient temperature for 1 hour and then extracted with ethyl acetate. The combined organic layers were washed with saturated aqueous NaHCO 3 and brine, dried with MgSO 4 and evaporated under vacuum.
  • Morpholine-4-carboxylic acid [1-(1-benzoyl-4-hydroxy-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide (92 mg, 0.169 mmol) was dissolved in DMSO (5 mL). Triethylamine (0.5 mL) and then SO 3 pyridine complex (150 mg) were added and the mixture was stirred at ambient temperature for 3 hours. After dilution with ethyl acetate (100 mL), the solution was washed with water (50 mL) and brine, dried with MgSO 4 and evaporated under vacuum.
  • Morpholine-4-carboxylic acid [1-(1-benzenesulfonyl-4-oxo-pyrrolidin-3-ylcarbamoyl) 2-phenylmethanesulfonyl-ethyl]-amide
  • Morpholine-4-carboxylic acid [1-(3-benzenesulfonylamino-2-oxo-prolylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide
  • N-(3-Amino-2-hydroxy-propyl)-benzenesulfonamide TFA salt was prepared as outlined in Renee L. DesJarlais et al. J. Am. Chem. Soc . 1998, 120, 9114-9115.
  • the mixture was stirred at room temperature for approximately 12 hours and then partitioned among a 4:1:2:3 mixture (100 mL total) of ethyl acetate, THF, water, and brine, respectively.
  • the organic phase was separated and washed with saturated aqueous sodium bicarbonate (30 mL), brine (30 mL), dried (MgSO 4 ), filtered and concentrated.
  • Morpholine-4-carboxylic acid [(R)-1-(6-oxo-cyclohex-1-enylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide
  • Morpholine-4-carboxylic acid [(R)-2-cyclopropylmethanesulfonyl-1-(6-oxo-cyclohex-1-enylcarbamoyl)-ethyl]-amide
  • Dess Martin Periodinane (0.688 g, 1.62 mmol) was added to a solution of the [(R)-2-cyclopropylmethanesulfonyl-1-(2,6-dihydroxy-cyclohexylcarbamoyl)-ethyl]-amide (0.32 g) in DCM (10 mL) and the mixture was stirred at room temperature for 3 hours then treated with resin bound Na 2 S 2 O 3 (1.5 mmol/g, 1.9 g) and stirred at room temperature for a further 24 hours. The reaction mixture was diluted with DCM (20 mL), then filtered.
  • Morpholine-4-carboxylic acid [(R)-1-(3,4-dioxo-cyclopentylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide
  • reaction mixture was washed with a solution of Na 2 S 2 O 3 in water (0.26M), then with saturated aqueous bicarbonate solution, then with water, then dried over Na 2 SO 4 and then evaporated under reduced pressure.
  • the residue was subjected to flash chromatography on silica eluting with a mixture of ethyl acetate and heptane, then with ethyl acetate to give morpholine-4-carboxylic acid [(R)-1-(3,4-dioxo-cyclopentylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide as an off white solid (45 mg).
  • Morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phenylmethanesulfonyl)-1-(2-oxo-cyclohexylcarbamoyl)-ethyl]-amide
  • Morpholine-4-carboxylic acid [1-(2-benzylcarbamoyl-2-oxo-ethylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide
  • Acetic acid 3-benzyloxycarbonylamino-4-oxo-azetidin-2-yl ester was prepared as outlined in J. C. Arnould et al. Eur. J. Med. Chem 1992, 27, 131-140.
  • Acetic acid 3-benzyloxycarbonylamino-4-oxo-azetidin-2-yl ester (100 mg, 0.36 mmol) was hydrogenated on a Parr shaker over 10% palladium on carbon (100 mg) in ethyl acetate (20 mL) at 50 psi for 5 h. The mixture was filtered through Celite and evaporated. Acetic acid 3-amino-4-oxo-azetidin-2-yl ester was obtained in quantitative yield.
  • Morpholine-4-carboxylic acid [1-(4-oxo-tetrahydro-furan-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide
  • Morpholine-4-carboxylic acid [1-(2-hydroxy-1,1-dimethyl-3-oxo-3-phenyl-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide
  • Step 1 To a flask fitted with a septum and stirbar under a nitrogen atmosphere containing 4.1 g (20 mmol) of 2-phenyl-1,3-dithiane (Aldrich) was added dry distilled THF (20 mL). The solution was cooled to ⁇ 30° C. and n-butyl lithium (1.6M in pentane, 16.8 mmol, 10.5 mL) was added slowly by syringe. The reaction mixture was warmed to ⁇ 20° C. and held at that temperature for 30 minutes, and then held at ⁇ 10° C. for 15 minutes. The yellow solution was cooled to ⁇ 78° C.
  • Step 3 2-Amino-2-methyl-1-(2-phenyl-[1,3]dithian-2-yl)-propan-1-ol and 2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid were coupled using the standard peptide coupling conditions hereinbefore described to afford morpholine-4-carboxylic acid ⁇ 1-[2-hydroxy-1,1-dimethyl-2-(2-phenyl-[1,3]dithian-2-yl)-ethylcarbamoyl]-2-phenylmethanesulfonyl-ethyl ⁇ -amide (270 mg, 78%).
  • Step 4 To morpholine-4-carboxylic acid ⁇ 1-[2-hydroxy-1,1-dimethyl-2-(2-phenyl-[1,3]dithian-2-yl)-ethylcarbamoyl]-2-phenylmethanesulfonyl-ethyl ⁇ -amide (200 mg, 0.32 mmol) in 5.25 ml of 4:1 acetonitrile:water at 23° C. was simultaneously added finely ground HgCl 2 (192 mg, 0.7 mmol) and finely ground calcium carbonate (80 mg, 0.8 mmol) with stirring. The mixture was stirred for 10 minutes and then diluted with ethyl acetate.
  • Step 5 [1-(2-hydroxy-1,1-dimethyl-3-oxo-3-phenyl-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide was oxidized in the usual manner to afford morpholine-4-carboxylic acid [1-(2-hydroxy-1,1-dimethyl-3-oxo-3-phenyl-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide.
  • test compounds in varying concentrations were prepared in 10 ⁇ L of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 ⁇ L, comprising: MES, 50 mM (pH 6.5); EDTA, 2.5 mM; and NaCl, 100 mM).
  • Assay buffer 40 ⁇ L, comprising: MES, 50 mM (pH 6.5); EDTA, 2.5 mM; and NaCl, 100 mM).
  • Human cathepsin S (0.158 pMoles in 25 ⁇ L of assay buffer) was added to the dilutions.
  • the assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature.
  • test compounds in varying concentrations were prepared in 10 ⁇ L of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 ⁇ L, comprising: N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid (BES), 50 mM (pH 6); polyoxyethylenesorbitan monolaurate, 0.05%; and dithiothreitol (DTT), 2.5 mM).
  • BES N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid
  • BES polyoxyethylenesorbitan monolaurate
  • DTT dithiothreitol
  • test compounds in varying concentrations were prepared in 10 ⁇ L of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 ⁇ L, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM).
  • assay buffer 40 ⁇ L, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM).
  • Human cathepsin K (0.0906 pMoles in 25 ⁇ L of assay buffer) was added to the dilutions.
  • the assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature.
  • test compounds in varying concentrations were prepared in 10 ⁇ L of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 ⁇ L, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM).
  • assay buffer 40 ⁇ L, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM).
  • Human cathepsin L (0.05 pMoles in 25 ⁇ L of assay buffer) was added to the dilutions.
  • the assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature.
  • K i apparent inhibition constants for compounds of the invention, against Cathepsin S, were in the range from about 10 ⁇ 10 M to about 10 ⁇ 7 M.

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Abstract

The present invention relates to novel cathepsin S inhibitors, the pharmaceutically acceptable salts and N-oxides thereof, their uses as therapeutic agents and the methods of their making.

Description

  • This application is a divisional of Non-Provisional application Ser. No. 10/787,367, filed on Feb. 2, 2004, which is a continuation of International Application No. PCT/US02/29323, filed Sep. 16, 2002, which claims the benefit of Provisional Application No. 60/322,318, filed on Sep. 14, 2001.
  • This Application relates to compounds and compositions for treating diseases associated with cysteine protease activity, particularly diseases associated with activity of cathepsin S.
    • DESCRIPTION OF THE FIELD
  • Cysteine proteases represent a class of peptidases characterized by the presence of a cysteine residue in the catalytic site of the enzyme. Cysteine proteases are associated with the normal degradation and processing of proteins. The aberrant activity of cysteine proteases, e.g., as a result of increase expression or enhanced activation, however, may have pathological consequences. In this regard, certain cysteine proteases are associated with a number of disease states, including arthritis, muscular dystrophy, inflammation, tumor invasion, glomerulonephritis, malaria, periodontal disease, metachromatic leukodystrophy and others. An increase in cathepsin S activity contributes to the pathology and/or symptomatology of a number of diseases. Accordingly, molecules that inhibit the activity of cathepsin S protease are useful as therapeutic agents in the treatment of such diseases.
    • SUMMARY OF THE INVENTION
  • This Application relates to compounds of Formula I:
    Figure US20070135386A1-20070614-C00001
    in which:
  • X1 and X2 are both methylene or X1 is ethylene and X2 is a bond;
  • R3 is —CR5═CHR6, —CR5(CR6 3)2 or —CR7═NR8, wherein R5 is hydrogen and R6 is hydrogen or (C1-4)alkyl or R5 and R6 together with the atoms to which R5 and R6 are attached form (C3-12)cycloalkenyl, hetero(C5-12)cycloalkenyl, (C6-12)aryl, hetero(C6-12)aryl, (C9-12)bicycloaryl or hetero(C8-12)bicycloaryl and R7 and R8 together with the atoms to which R7 and R8 are attached form hetero(C5-12)cycloalkenyl, hetero(C6-12)aryl or hetero(C8-12)bicycloaryl, wherein R3 optionally is substituted by 1 to 5 radicals independently selected from a group consisting of (C1-4)alkyl, cyano, halo, halo-substituted (C1-4)alkyl, nitro, —X4NR9R9, —X4OR9, —X4SR9, —X4C(O)NR9R9, —X4C(O)OR9, —X4S(O)R10, —X4S(O)2R10 and —X4C(O)R10, wherein X4 is a bond or (C1-2)alkylene, R9 at each occurrence independently is hydrogen, (C1-3)alkyl or halo-substituted (C1-3)alkyl and R10 is (C1-3)alkyl or halo-substituted (C1-3)alkyl; and
  • R4 is —C(O)X5R11 or —S(O)2X5R11, wherein X5 is a bond, —O— or —NR12—, wherein R12 is hydrogen or (C1-6)alkyl, and R11 is (i) (C1-6)alkyl optionally substituted by —OR13, —SR13, —S(O)R13, —S(O)2R13, —C(O)R13, —C(O)OR13, —C(O)NR13R14, —NR13R14, —NR14C(O)R13, —NR14C(O)OR13, —NR14C(O)NR13R14 or —NR14C(NR14)NR13R14, wherein R13 is (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl and R14 at each occurrence independently is hydrogen or (C1-6)alkyl, or (ii) (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl or (iii) (C3-6)cycloalkyl(C0-3)alkyl, hetero(C5-6)cycloalkyl(C0-3)alkyl, phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl substituted by —X6OR15, —X6SR15, —X6S(O)R15, —X6S(O)2R15, —X6C(O)R15, —X6C(O)OR15, —X6C(O)NR15R16, —X6NR15R16, —X6NR16C(O)R15, —X6NR16C(O)OR15, —X6NR16C(O)NR15R16, —X6NR16C(O)OR16, —X6NR16C(NR16)NR15R16, wherein X6 is a bond or methylene, R15 is (C3-6)cycloalkyl(C0-3)alkyl, hetero(C5-6)cycloalkyl(C0-3)alkyl, phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl and R16 is hydrogen or (C1-6)alkyl; wherein R4 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, (C1-6)alkylidene, cyano, halo, nitro, halo-substituted (C1-3)alkyl, —X6NR17R17, —X6NR17C(O)OR17, —X6NR17C(O)NR17R17, —X6NR17C(NR17)NR17R17, —X6OR17, —X6SR17, —X6C(O)OR17, —X6C(O)NR17R17, —X6S(O)2NR17R17, —X6P(O)(OR18)OR17, —X6OP(O)(OR18)OR17, —X6NR17C(O)R18, —X6S(O)R18, —X6S(O)2R18 and —X6C(O)R18 and when occurring within an aliphatic moiety are radicals independently selected from a group consisting of cyano, halo, nitro, —NR17R17, —NR17C(O)OR17, —NR17C(O)NR17R17, —NR17C(NR17)NR17R17, —OR17, —SR17, —C(O)OR17, —C(O)NR17R17, —S(O)2NR17R17, —P(O)(OR17)OR17, —OP(O)(OR17)OR17, —NR17C(O)R18, —S(O)R18, —S(O)2R18 and —C(O)R18, wherein X6 is a bond or (C1-6)alkylene, R17 at each occurrence independently is hydrogen, (C1-6)alkyl or halo-substituted (C1-3)alkyl and R18 is (C1-6)alkyl or halo-substituted (C1-3)alkyl;
  • X3 is a group of Formula (a), (b), (c), (d), (e), (f), (g) or (h):
    Figure US20070135386A1-20070614-C00002
  • Figure US20070135386A1-20070614-P00001
    represents a single bond, or a double bond;
  • X7 represents aryl, heteroaryl or NR20R25;
  • n is 0, 1 or 2;
  • R20 is selected from tie group consisting of hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl and hetero(C5-12)aryl(C0-6)alkyl;
  • R21 is selected from the group consisting of hydrogen, (C1-9)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-12)aryl(C0-6)alkyl, (C9-12)bicycloaryl(C0-3)alkyl, hetero(C8-12)-bicycloaryl(C0-3)alkyl, —C(O)R26, —C(S)R26, —S(O)2R26, —C(O)OR26, —C(O)N(R26)R27, —C(S)N(R26)R27 and —S(O)2N(R27)R26;
  • R23 is selected from —H, (C1-6)alkyl, (C4-6)alkenyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl or hetero(C5-12)aryl(C0-6)alkyl optionally substituted with amino, —NHC(O)R15 or —R15 wherein R15 is as described above;
  • R25 is selected from hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-13)aryl(C0-6)alkyl, —X4NHR15, —X4S(O)2R26 or —X4C(O)R17NR17C(O)R17 wherein R15, R17 and X4 are as described above;
  • R26 is selected from the group consisting of hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-12)aryl(C0-6)alkyl, (C9-12)bicycloaryl(C0-3)alkyl and hetero(C8-12)-bicycloaryl(C0-3)alkyl;
  • R27 is hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl or hetero(C5-12)aryl(C0-6)alkyl;
  • R28 is R20 or —O—C(═O)—R29;
  • R29 is (C1-6)alkyl, (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl;
      • wherein X3 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, (C1-6)alkylidene, cyano, halo, nitro, halo-substituted (C1-3)alkyl, —X6NR17R17, —X6NR17C(O)OR17, —X6NR17C(O)NR17R17, —X6NR17C(NR17)NR17R17, —X6OR17, —X6C(O)R17, —X6OR15, —X6SR17, —X6C(O)OR17, —X6C(O)NR17R17, —X6S(O)2NR17R17, —X6P(O)(OR8)OR17, —X6OP(O)(OR8)OR17, —X6NR17C(O)R18, —X6S(O)R18, —X6S(O)2R18 and —X6C(O)R18 and when occurring within an aliphatic moiety are radicals independently selected from a group consisting of cyano, halo, nitro, —NR17R17, —NR17C(O)OR17, —NR17C(O)NR17R17, —NR17C(NR17)NR17R17, —OR17, —SR17, —C(O)OR17, —C(O)NR17R17, —S(O)2NR17R17, —P(O)(OR17)OR17, —OP(O)(OR17)OR17, —NR17C(O)R18, —S(O)R18, —S(O)2R18 and —C(O)R18, wherein R15, R17, R18 and X6 are as described above.
  • A second aspect of the invention is a pharmaceutical composition that contains a compound of Formula I or their N-oxide derivatives, individual isomers or mixture of isomers thereof, or pharmaceutically acceptable salts thereof, in admixture with one or more suitable excipients.
  • A third aspect of the invention is a method for treating a disease in an animal in which inhibition of cathepsin S can prevent, inhibit or ameliorate the pathology and/or symptomatology of the disease, which method comprises administering to the animal a therapeutically effective amount of compound of Formula I or a N-oxide derivative, individual isomer or mixture of isomers thereof; or a pharmaceutically acceptable salt thereof.
  • A fourth aspect of the invention is the processes for preparing compounds of Formula I and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof; and the pharmaceutically acceptable salts thereof.
    • DETAILED DESCRIPTION OF THE INVENTION
  • Definitions:
  • Unless otherwise stated, the following terms used in the specification and claims are defined for the purposes of this Application and have the following meanings.
  • “Alicyclic” means a moiety characterized by arrangement of the carbon atoms in closed non-aromatic ring structures having properties resembling those of aliphatics and may be saturated or partially unsaturated with two or more double or triple bonds.
  • “Aliphatic” means a moiety characterized by a straight or branched chain arrangement of the constituent carbon atoms and may be saturated or partially unsaturated with two or more double or triple bonds.
  • “Alkyl” represented by itself means a straight or branched, saturated or unsaturated, aliphatic radical having the number of carbon atoms indicated (e.g., (C1-6)alkyl includes methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, isobutyl, tert-butyl, vinyl, allyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 2-methylallyl, ethynyl, 1-propynyl, 2-propynyl, and the like). Alkyl represented along with another radical (e.g., as in arylalkyl) means a straight or branched, saturated or unsaturated aliphatic divalent radical having the number of atoms indicated or when no atoms are indicated means a bond (e.g., (C6-10)aryl(C0-3)alkyl includes phenyl, benzyl, phenethyl, 1-phenylethyl 3-phenylpropyl, and the like).
  • “Alkylene”, unless indicated otherwise, means a straight or branched, saturated or unsaturated, aliphatic, divalent radical having the number of carbon atoms indicated (e.g., (C1-6)alkylene includes methylene (—CH2—), ethylene (—CH2CH2—), trimethylene (—CH2CH2CH2—), tetramethylene (—CH2CH2CH2CH2—) 2-butenylene (—CH2CH═CHCH2—), 2-methyltetramethylene (—CH2CH(CH3)CH2CH2—), pentamethylene (—CH2CH2CH2CH2CH2—) and the like).
  • “Alkylidene” means a straight or branched saturated or unsaturated, aliphatic, divalent radical having the number of carbon atoms indicated (e.g. (C1-6)alkylidene includes methylene (═CH2), ethylidene (═CHCH3), isopropylidene (═C(CH3)2), propylidene (═CHCH2CH3), allylidene (═CH—CH═CH2), and the like).
  • “Amino” means the radical —NH2. Unless indicated otherwise, the compounds of the invention containing amino moieties include protected derivatives thereof. Suitable protecting groups for amino moieties include acetyl, tert-butoxycarbonyl, benzyloxycarbonyl, and the like.
  • “Animal” includes humans, non-human mammals (e.g., dogs, cats, rabbits, cattle, horses, sheep, goats, swine, deer, and the like) and non-mammals (e.g., birds, and the like).
  • “Aromatic” means a moiety wherein the constituent atoms make up an unsaturated ring system, all atoms in the ring system are Sp2 hybridized and the total number of pi electrons is equal to 4n+2.
  • “Aryl” means a monocyclic or fused bicyclic ring assembly containing the total number of ring carbon atoms indicated, wherein each ring is comprised of 6 ring carbon atoms and is aromatic or when fused with a second ring forms an aromatic ring assembly. For example, optionally substituted (C6-10)aryl as used in this Application includes, but is not limited to, biphenyl-2-yl, 2-bromophenyl, 2-bromocarbonylphenyl, 2-bromo-5-fluorophenyl, 4-tert-butylphenyl, 4-carbamoylphenyl, 4-carboxy-2-nitrophenyl, 2-chlorophenyl, 4-chlorophenyl, 3-chlorocarbonylphenyl, 4-chlorocarbonylphenyl, 2-chloro-4-fluorophenyl, 2-chloro-6-fluorophenyl, 4-chloro-2-nitrophenyl, 6-chloro-2-nitrophenyl, 2,6-dibromophenyl, 2,3-dichlorophenyl, 2,5-dichlorophenyl, 3,4-dichlorophenyl, 2-difluoromethoxyphenyl, 3,5-dimethylphenyl, 2-ethoxycarbonylphenyl, 2-fluorophenyl, 2-iodophenyl, 4-isopropylphenyl, 2-methoxyphenyl, 4-methoxyphenyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 5-methyl-2-nitrophenyl, 4-methylsulfonylphenyl, naphth-2-yl, 2-nitrophenyl, 3-nitrophenyl, 4-nitrophenyl, 2,3,4,5,6-pentafluorophenyl, phenyl, 2-trifluoromethoxyphenyl, 3-trifluoromethoxyphenyl, 4-trifluoromethoxyphenyl, 2-trifluoromethylphenyl, 3-trifluoromethylphenyl, 4-trifluoromethylphenyl, 2-trifluoromethylsulfanylphenyl, 4-trifluoromethylsulfanylphenyl, and the like. Optionally substituted (C6-10)aryl as used in this Application includes 3-acetylphenyl, 3-tert-butoxycarbonylaminomethylphenyl, biphenyl-4-yl, 3-hydroxyphenyl, 4-hydroxyphenyl, 3-methoxyphenyl, naphth-2-yl, 3-phenoxyphenyl, phenyl, and the like.
  • “Bicycloaryl” means a bicyclic ring assembly containing the number of ring carbon atoms indicated, wherein the rings are linked by a single bond or fused and at least one of the rings comprising the assembly is aromatic, and any carbocyclic ketone, thioketone or iminoketone derivative thereof (e.g., (C9-10)bicycloaryl includes cyclohexylphenyl, 1,2-dihydronaphthyl, 2,4-dioxo-1,2,3,4-tetrahydronaphthyl, indanyl, indenyl, 1,2,3,4-tetrahydronaphthyl, and the like).
  • “Carbamoyl” means the radical —C(O)NH2. Unless indicated otherwise, the compounds of the invention containing carbamoyl moieties include protected derivatives thereof. Suitable protecting groups for carbamoyl moieties include acetyl, tert-butoxycarbonyl, benzyloxycarbonyl, and the like and both the unprotected and protected derivatives fall within the scope of the invention.
  • “Carbocyclic ketone derivative” means a derivative containing the moiety —C(O)—.
  • “Carboxy” means the radical —C(O)OH. Unless indicated otherwise, the compounds of the invention containing carboxy moieties include protected derivatives thereof. Suitable protecting groups for carboxy moieties include benzyl, tert-butyl, and the like.
  • “Cycloalkyl” means a saturated or partially unsaturated, monocyclic, fused bicyclic or bridged polycyclic ring assembly containing the number of ring carbon atoms indicated, and any carbocyclic ketone, thioketone or iminoketone derivative thereof (e.g., (C3-10)cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclohexenyl, 2,5-cyclohexadienyl, bicyclo[2.2.2]octyl, adamantan-1-yl, decahydronaphthyl, oxocyclohexyl, dioxocyclohexyl, thiocyclohexyl, 2-oxobicyclo[2.2.1]hept-1-yl, and the like).
  • “Cycloalkylene” means a divalent saturated or partially unsaturated, monocyclic ring or bridged polycyclic ring assembly containing the number of ring carbon atoms indicated, and any carbocyclic ketone, thioketone or iminoketone derivative thereof. For example, the instance wherein “R1 and R2 together with the carbon atom to which both R1 and R2 are attached form (C3-8)cycloalkylene” includes, but is not limited to, the following:
    Figure US20070135386A1-20070614-C00003
  • “Disease” specifically includes any unhealthy condition of an animal orpart thereof and includes an unhealthy condition that may be caused by, or incident to, medical or veterinary therapy applied to that animal, i.e., the “side effects” of such therapy.
  • “Halo” means fluoro, chloro, bromo or iodo.
  • “Halo-substituted alkyl”, as an isolated group or part of a larger group, means “alkyl” substituted by one or more “halo” atoms, as such terms are defined in this Application. Halo-substituted alkyl includes haloalkyl, dihaloalkyl, trihaloalkyl, perhaloalkyl and the like (e.g. halo-substituted (C1-3)alkyl includes chloromethyl, dichloromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trifluoroethyl, perfluoroethyl, 2,2,2-trifluoro-1,1-dichloroethyl, and the like).
  • “Heteroatom moiety” includes —N═, —NR—, —N+(O−)═, —O—; —S— or —S(O)2—, wherein R is hydrogen, (C1-6)alkyl or a protecting group.
  • “Heterocycloalkylene” means cycloalkylene, as defined in this Application, provided that one or more of the ring member carbon atoms indicated, is replaced by heteroatom moiety selected from —N═, —NR—, —O—, —S— or —S(O)2—, wherein R is hydrogen or (C1-6)alkyl. For example, the instance wherein R1 and R2 together with the carbon atom to which both R1 and R2 are attached form hetero(C3-8)cycloalkylene” includes, but is not limited to, the following:
    Figure US20070135386A1-20070614-C00004
    in which R is hydrogen, (C1-6)alkyl, or a protecting group.
  • “Heteroaryl” means aryl, as defined in this Application, provided that one or more of the ring carbon atoms indicated are replaced by a heteroatom moiety selected from —N═, —NR—, —N+(O−)═, —O— or —S—, wherein R is hydrogen, (C1-6)alkyl, a protecting group or represents the free valence which serves as the point of attachment to a ring nitrogen, and each ring is comprised of 5 or 6 ring atoms. For example, optionally substituted hetero(C5-13)aryl as used in this Application includes, but is not limited to, 4-amino-2-hydroxypyrimidin-5-yl, dibenzofuranyl, benzothiazol-2-yl, 1H-benzoimidazol-2-yl, 2-bromopyrid-5-yl, 5-bromopyrid-2-yl, 4-carbamoylthiazol-2-yl, 3-carboxypyrid-4-yl, 5-carboxy-2,6-dimethylpyrid-3-yl, 3,5-dimethylisoxazol-4-yl, 5-ethoxy-2,6-dimethylpyrid-3-yl, 5-fluoro-6-hydroxypyrimidin-4-yl, fur-2-yl, fur-3-yl, 5-hydroxy-4,6-dimethylpyrid-3-yl, 8-hydroxy-5,7-dimethylquinolin-2-yl, 5-hydroxymethylisoxazol-3-yl, 3-hydroxy-6-methylpyrid-2-yl, 3-hydroxypyrid-2-yl, 1H-imidazol-2-yl, 1H-imidazol-4-yl, 1H-indol-3-yl, isothiazol-4-yl, isoxazol-4-yl, 2-methylfur-3-yl, 5-methylfur-2-yl, 1-methyl-1H-imidazol-2-yl, 5-methyl-3H-imidazol-4-yl, 5-methylisoxazol-3-yl, 5-methyl-2H-pyrazol-3-yl, 3-methylpyrid-2-yl, 4-methylpyrid-2-yl, 5-methylpyrid-2-yl, 6-methylpyrid-2-yl, 2-methylpyrid-3-yl, 2-methylthiazol-4-yl, 5-nitropyrid-2-yl, 2H-pyrazol-3-yl, 3H-pyrazolyl, pyridazin-3-yl, pyrid-2-yl, pyrid-3-yl, pyrid-4-yl, 5-pyrid-3-yl-2H-[1,2,4]triazol-3-yl, pyrimidin-4-yl, pyrimidin-5-yl, 1H-pyrrol-3-yl, quinolin-2-yl, 1H-tetrazol-5-yl, thiazol-2-yl, thiazol-5-yl, thien-2-yl, thien-3-yl, 2H-[1,2,4]triazol-3-yl, 3H-[1,2,3]triazol-4-yl, 5-trifluoromethylpyrid-2-yl, and the like. Suitable protecting groups include tert-butoxycarbonyl, benzyloxycarbonyl, benzyl, 4-methoxybenzyl, 2-nitrobenzyl, and the like. Optionally substituted hetero(C5-10)aryl as used in this Application to define R4 includes benzofur-2-yl, fur-2-yl, fur-3-yl, pyrid-3-yl, pyrid-4-yl, quinol-2-yl, quinol-3-yl, thien-2-yl, thien-3-yl, and the like.
  • “Heterobicycloaryl” means bicycloaryl, as defined in this Application, provided that one or more of the ring carbon atoms indicated are replaced by a heteroatom moiety selected from —N═, —NR—, —O— or —S—, wherein R is hydrogen, (C1-6)alkyl, a protecting group or represents the free valence which serves as the point of attachment to a ring nitrogen, and any carbocyclic ketone, thioketone or iminoketone derivative thereof. For example, optionally substituted hetero(C8-10)bicycloaryl as used in this Application includes, but is not limited to, 2-amino-4-oxo-3,4-dihydropteridin-6-yl, and the like. In general, the term heterobicycloaryl as used in this Application includes, for example, benzo[1,3]dioxol-5-yl, 3,4-dihydro-2H-[1,8]naphthyridinyl, 3,4-dihydro-2H-quinolinyl, 2,4-dioxo-3,4-dihydro-2H-quinazolinyl, 1,2,3,4,5,6-hexahydro[2,2′]bipyridinylyl, 3-oxo-2,3-dihydrobenzo[1,4]oxazinyl, 5,6,7,8-tetrahydroquinolinyl, and the like.
  • “Heterocycloalkyl” means cycloalkyl, as defined in this Application, provided that one or more of the ring carbon atoms indicated are replaced by a heteroatom moiety selected from —N═, —NR—, —O— or —S—, wherein R is hydrogen, (C1-6)alkyl, a protecting group or represents the free valence which serves as the point of attachment to a ring nitrogen, and any carbocyclic ketone, thioketone or iminoketone derivative thereof (e.g., the term hetero(C5-10)cycloalkyl includes imidazolidinyl, morpholinyl, piperazinyl, piperidyl, pyrrolidinyl, pyrrolinyl, quinuclidinyl, and the like). Suitable protecting groups include tert-butoxycarbonyl, benzyloxycarbonyl, benzyl, 4-methoxybenzyl, 2-nitrobenzyl, and the like. Both the unprotected and protected derivatives fall within the scope of the invention.
  • “Hydroxy” means the radical —OH. Unless indicated otherwise, the compounds of the invention containing hydroxy radicals include protected derivatives thereof. Suitable protecting groups for hydroxy moieties include benzyl and the like.
  • “Iminoketone derivative” means a derivative containing the moiety —C(NR)—, wherein R is hydrogen or (C1-6)alkyl.
  • “Isomers” mean compounds of Formula I having identical molecular formulae but differ in the nature or sequence of bonding of their atoms or in the arrangement of their atoms in space. Isomers that differ in the arrangement of their atoms in space are termed “stereoisomers”. Stereoisomers that are not mirror images of one another are termed “diastereomers” and stereoisomers that are nonsuperimposable mirror images are termed “enantiomers” or sometimes “opfical isomers”. A carbon atom bonded to four nonidentical substituents is termed a “chiral center”. A compound with one chiral center has two enantiomeric forms of opposite chirality is termed a “racemic mixture”. A compound that has more than one chiral center has 2n−1 enantiomeric pairs, whereAn is the number of chiral centers. Compounds with more than one chiral center may exist as -ether an individual diastereomers or as a mixture of diastereomers, termed a “diastereomeric mixture”. When one chiral center is present a stereoisomer may be characterized by the absolute configuration of that chiral center. Absolute configuration refers to the arrangement in space of the substituents attached to the chiral center. Enanfiomers are characterized by the absolute configuration of their chiral centers and described by the R- and S-sequencing rules of Cahn, Ingold and Prelog. Conventions for stereochemical nomenclature, methods for the determination of stereochemistry and the separation of stereoisomers are well known in the art (e.g., see “Advanced Organic Chemistry”, 4th edition, March, Jerry, John Wiley & Sons, New York, 1992). It is understood that the names and illustration used in this Application to describe compounds of Formula I are meant to be encompassed all possible stereoisomers. Thus, for example, the name morpholine-4-carboxylic acid [1(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide is meant to include morpholine-4-carboxylic acid [S-1-(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide and morpholine-4-carboxylic acid [R-1-(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide and any mixture, racemic or otherwise, thereof.
  • “Ketone derivative” means a derivative containing the moiety —C(O)—. For example, for 2-acetoxy-azetidin-3-yl, the “carbocyclic ketone derivative” would be 2-acetoxy-4-oxo-azetidin-3-yl.
  • “Nitro” means the radical —NO2.
  • “Optional” or “optionally” means that the subsequently described event or circumstance may or may not occur, and that the description includes instances where the event or circumstance occurs and instances in which it does not. For example, the phrase “wherein within R3 and R4 any alicyclic or aromatic ring system may be subsfituted further by 1-5 radicals . . . ” means that R3 and R4 may or may not be substituted in order to fall within the scope of the invention.
  • “Oxoalkyl” means alkyl, as defined above, wherein one of the number of carbon atoms indicated is replaced by an oxygen group (—O—), e.g., oxo(C2-6)alkyl includes methoxymethyl, etc.
  • “N-oxide derivatives” means derivatives of compounds of Formula I in which nitrogens are in an oxidized state (i.e., O—N) and which possess the desired pharmacological activity.
  • “Pathology” of a disease means the essential nature, causes and development of the disease as well as the structural and functional changes that result from the disease processes.
  • “Pharmaceutically acceptable” means that which is useful in preparing a pharmaceutical composition that is generally safe, non-toxic and neither biologically nor otherwise undesirable and includes that which is acceptable for veterinary use as well as human pharmaceutical use.
  • “Pharmaceutically acceptable salts” means salts of compounds of Formula I which are pharmaceutically acceptable, as defined above, and which possess the desired pharmacological activity. Such salts include acid addition salts formed with inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like; or with organic acids such as acetic acid, propionic acid, hexanoic acid, heptanoic acid, cyclopentanepropionic acid, glycolic acid, pyruvic acid, lactic acid, malonic acid, succinic acid, malic acid, maleic acid, fumaric acid, tartatic acid, citric acid, benzoic acid, o-(4-hydroxybenzoyl)benzoic acid, cinnamic acid, madelic acid, methanesulfonic acid, ethanesulfonic acid, 1,2-ethanedisulfonic acid, 2-hydroxyethanesulfonic acid, benzenesulfonic acid, p-chlorobenzenesulfonic acid, 2-naphthalenesulfonic acid, p-toluenesulfonic acid, camphorsulfonic acid, 4-methylbicyclo[2.2.2]oct-2-ene-1-carboxylic acid, glucoheptonic acid, 4,4′-methylenebis(3-hydroxy-2-ene-1-carboxylic acid), 3-phenylpropionic acid, trimethylacetic acid, tertiary butylacetic acid, lauryl sulfuric acid, gluconic acid, glutamic acid, hydroxynaphthoic acid, salicylic acid, stearic acid, muconic acid and the like.
  • Pharmaceutically acceptable salts also include base addition salts which may be formed when acidic protons present are capable of reacting with inorganic or organic bases. Acceptable inorganic bases include sodium hydroxide, sodium carbonate, potassium hydroxide, aluminum hydroxide and calcium hydroxide. Acceptable organic bases include ethanolamine, diethanolamine, triethanolamine, tromethamine, N-methylglucamine and the like.
  • “Prodrug” means a compound which is convertible in vivo by metabolic means (e.g. by hydrolysis) to a compound of Formula I. For example an ester of a compound of Formula I containing a hydroxy group may be convertible by hydrolysis in vivo to the parent molecule. Alternatively an ester of a compound of Formula I containing a carboxy group may be convertible by hydrolysis in vivo to the parent molecule. Suitable esters of compounds of Formula I containing a hydroxy group, are for example acetates, citrates, lactates, tartrates, malonates, oxalates, salicylates, propionates, succinates, fumarates, maleates, methylene-bis-b-hydroxynaphthoates, gentisates, isethionates, di-p-toluoyltartrates, methanesulphonates, ethanesulphonates, benzenesulphonates, p-toluenesulphonates, cyclohexylsulphamates and quinates. Suitable esters of compounds of Formula I containing a carboxy group, are for example those described by F. J. Leinweber, Drug Metab. Res., 1987, 18, page 379. An especially useful class of esters of compounds of Formula I containing a hydroxy group, may be formed from acid moieties selected from those described by Bundgaard et al., J. Med. Chem., 1989, 32, page 2503-2507, and include substituted (aminomethyl)-benzoates, for example, dialkylamino-methylbenzoates in which the two alkyl groups may be joined together and/or interrupted by an oxygen atom or by an optionally substituted nitrogen atom, e.g. an alkylated nitrogen atom, more especially (morpholino-methyl)benzoates, e.g. 3- or 4-(morpholinomethyl)-benzoates, and (4-alkylpiperazin-1-yl)benzoates, e.g. 3- or 4-(4-alkylpiperazin-1-yl)benzoates.
  • “Protected derivatives” means derivatives of compounds of Formula I in which a reactive site or sites are blocked with protecting groups. Protected derivatives of compounds of Formula I are useful in the preparation of compounds of Formula I or in themselves may be active cathepsin S inhibitors. A comprehensive list of suitable protecting groups can be found in T. W. Greene, Protecting Groups in Organic Synthesis, 3rd edition, John Wiley & Sons, Inc. 1999.
  • “Therapeutically effective amount” means that amount which, when administered to an animal for treating a disease, is sufficient to effect such treatment for the disease.
  • “Thioketone derivative” means a derivative containing the moiety —C(S)—.
  • “Treatment” or “treating” means any administration of a compound of the present invention and includes:
    • (1) preventing the disease from occurring in an animal which may be predisposed to the disease but does not yet experience or display the pathology or symptomatology of the disease,
    • (2) inhibiting the disease in an animal that is experiencing or displaying the pathology or symptomatology of the diseased (i.e., arresting further development of the pathology and/or symptomatology), or
    • (3) ameliorating the disease in an animal that is experiencing or displaying the pathology or symptomatology of the diseased (i.e., reversing the pathology and/or symptomatology).
      Nomenclature:
  • The compounds of Formula I and the intermediates and starting materials used in their preparation are named in accordance with IUPAC rules of nomenclature in which the characteristic groups have decreasing priority for citation as the principle group as follows: acids, esters, amides, etc. Alternatively, the compounds are named by AutoNom 4.0 (Beilstein Information Systems, Inc.). For example, a compound of Formula I in which R3 is phenyl, R4 is morpholine-4-carbonyl and X3 is 1-benzoyl-4-oxo-pyrrolidin-3-ylamino; that is, a compound having the following structure:
    Figure US20070135386A1-20070614-C00005
    is named morpholine-4-carboxylic acid [1-(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide.
    • Presently Preferred Embodiments
  • While the broadest definition of the invention is set forth in the Summary of the Invention, certain aspects of the invention are preferred. For example, for a compound of Formula I, in which X1 and X2 are both methylene or X1 is ethylene and X2 is a bond; R3 is —CR5═CHR6, —CR5(CR6 3)2 or —CR7═NR8, wherein R5 is hydrogen and R6 is hydrogen or (C1-4)alkyl or R5 and R6 together with the atoms to which R5 and R6 are attached form (C3-12)cycloalkenyl, (C6-12)aryl, hetero(C6-12)aryl or (C9-12)bicycloaryl and R7 and R8 together with the atoms to which R7 and R8 are attached form hetero(C5-12)cycloalkenyl or hetero(C6-12)aryl, wherein R3 optionally is substituted by 1 to 5 radicals independently selected from a group consisting of (C1-4)alkyl, cyano, halo, halo-substituted (C1-4)alkyl, —X4OR9 and —X4C(O)OR9, wherein X4 is a bond or (C1-2)alkylene, R9 at each occurrence independently is (C1-3)alkyl or halo-substituted (C1-3)alkyl; R4 is —C(O)X5R11 or —S(O)2X5R11, wherein X5 is a bond, —O— or —NR12—, wherein R12 is hydrogen or (C1-6)alkyl, and R11 is (i) (C1-6)alkyl or (ii) hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl or (iii) hetero(C5-6)cycloalkyl(C0-3)alkyl or phenyl(C0-3)alkyl substituted by —X6OR15, —X6C(O)R15 or —X6NR16C(O)OR16, wherein X6 is a bond or methylene, R15 is phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl and R16 is hydrogen or (C1-6)alkyl; wherein R4 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, halo, —X6NR17R17, —X6OR17, —X6C(O)OR17, —X6NC(O)R16 and —X6C(O)R18, R17 at each occurrence independently is hydrogen, (C1-6)alkyl or halo-substituted (C1-3)alkyl and R18 is (C1-6)alkyl or halo-substituted (C1-3)alkyl.
  • In particular, X3 is a group of Formula (a), (b) or (c) in which: n is 0, 1 or 2; R20 is selected from the group consisting of hydrogen and (C1-6)alkyl; R21 is selected from the group consisting of (C1-9)alkyl, (C6-12)aryl(C0-6)alkyl, —C(O)R26, —S(O)2R26, —C(O)OR26 and —C(O)N(R26)R27; R23 is selected from (C1-6)alkyl optionally substituted with amino, —NHC(O)R15 or —R15 wherein R15 is as described above; R25 is selected from (C1-6)alkyl, (C6-12)aryl(C0-6)alkyl, —X4S(O)2R26 or —X4C(O)R17NR17C(O)R17 wherein R17 and X4 are as described above and R26 is as described below; R26 is selected from the group consisting of (C1-6)alkyl, hetero(C5-12)cycloalkyl(Q0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-12)aryl(C0-6)alkyl and (C9-12)bicycloaryl(C0-3)alkyl; R27 is (C1-6)alkyl; herein X3 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, cyano, halo, —X6OR17, —X6C(O)R17 and —X6OR15.
  • R3 more preferably is selected from the group consisting of phenyl, pyridin-2-yl, pyridin-3-yl, pyridin-4-yl, vinyl, 2-difluoromethoxyphenyl, 1-oxy-pyridin-2-yl, 4-methoxyphenyl, 4-methylphenyl, 2-methylphenyl, 4-chlorophenyl, 3,5-dimethylphenyl, 4-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 2-bromophenyl, naphthalen-2-yl, 3,4-dichlorophenyl, 3-methylphenyl, 3-trifluoromethylphenyl, 3-trifluoromethoxyphenyl, 2,3,4,5,6-pentafluoro-phenyl, 2-fluorophenyl, 2-chlorophenyl, 2-cyano-phenyl, 2-trifluoromethylphenyl, 4-tert-butyl-phenyl, 3-chlorophenyl, 4-bromophenyl, 2-fluoro-3-chloro-phenyl, 2-fluoro-3-methyl-phenyl, 3-fluorophenyl, 2,5-difluorophenyl, 3-bromophenyl, 2,5-dichlorophenyl, 2,6-difluorophenyl, 3-cyano-phenyl, 4-cyano-phenyl, 2-trifluoromethoxyphenyl, 2,3-difluorophenyl, biphenyl, 2-bromo-5-fluoro-phenyl, 4-fluorophenyl, 3,4-difluorophenyl, 2,4-difluorophenyl, 2,4,6-trifluorophenyl, 2,4,5-trifluorophenyl, 2,3,4-trifluorophenyl, 2-chloro-5-trifluoromethylphenyl, 2,4-bis-trifluoromethylphenyl, 2,5,6-trifluorophenyl, 2-fluoro-3-trifluoromethylphenyl, 2-fluoro-4-trifluoromethylphenyl, 2-fluoro-5-trifluoromethylphenyl, 2,3,5-trifluorophenyl, 2-fluoro-5-trifluoromethylphenyl, 5-fluoro-2-trifluoromethylphenyl, 4-fluoro-3-trifluoromethylphenyl, 2-methoxyphenyl, 3,5-bis-trifluoromethylphenyl, 4-difluoromethoxyphenyl, 3-difluoromethoxyphenyl, 2,6-dichlorophenyl, 4-carboxyphenyl, cyclohexyl, cyclopropyl, isopropyl, thiophen-2-yl, 5-chloro-thiophen-2-yl and 3,5-dimethyl-isoxazol-4-yl.
  • R4 more preferably is selected from the group consisting of benzoyl, morpholine-4-carbonyl, acetyl, furan-3-carbonyl, 2-methoxy-benzoyl, 3-methoxy-benzoyl, naphthalene-2-carbonyl, benzo[1,3]dioxole-5-carbonyl, 3-pyridin-3-yl-acryloyl, benzofuran-2-carbonyl, furan-2-carbonyl, tert-butoxy-carbonyl, biphenyl-4-carbonyl, quinoline-2-carbonyl, quinoline-3-carbonyl, 3-acetyl-benzoyl, 4-phenoxy-benzoyl, 3-hydroxy-benzoyl, 4-hydroxy-benzoyl, pyridine-3-carbonyl, 3-(tert-butoxycarbonylamino-methyl)-benzoyl, 4-carbonyl-piperazine-1-carboxylic acid tert-butyl ester, 4-carbonyl-piperazine-1-carboxylic acid ethyl ester, 4-(furan-2-carbonyl)-piperazine-1-carbonyl, pyridine-4-carbonyl, 1-oxy-pyridine-4-carbonyl, 1-oxy-pyridine-3-carbonyl, thiophene-2-carbonyl, thiophene-3-carbonyl, 4-benzoyl-benzoyl, 5-methyl-thiophene-2-carbonyl, 3-chloro-thiophene-2-carbonyl, 3-bromo-thiophene-2-carbonyl, 4-chloro-benzoyl, 3-flouro-4-methoxy-benzoyl, 4-methoxy-benzoyl, 4-triflouromethoxy-benzoyl, 3,4-diflouro-benzoyl, 4-fluoro-benzoyl, 3,4-dimethoxy-benzoyl, 3-methyl-benzoyl, 4-bromo-benzoyl, 4-triflouromethyl-benzoyl, 3-benzoyl-benzoyl, cyclopentane-carbonyl, benzo[b]thiophene-2-carbonyl, 3-chloro-benzo[b]thiophene-2-carbonyl, benzenesulfonyl, naphthalene-2-sulfonyl, 5-methyl-thiophene-2-sulfonyl, thiophene-2-sulfonyl, formamyl-methyl ester, 4-methyl-pentanoyl, formamyl-isobutyl ester, formamyl-monoallyl ester, formamyl-isopropyl ester, N,N-dimethyl-formamyl, N-isopropyl-formamyl, N-pyridin-4-yl-formamyl, N-pyridin-3-yl-formamyl, 3-phenyl-acryloyl, 1H-indole-5-carbonyl, pyridine-2-carbonyl, pyrazine-2-carbonyl, 3-hydroxy-pyridine-2-carbonyl, 2-amino-pyridine-3-carbonyl, 2-hydroxy-pyridine-3-carbonyl, 6-amino-pyridine-3-carbonyl,-6-hydroxy-pyridine-3-carbonyl, pyridazine-4-carbonyl, 3-phenoxy-benzoyl and 1-oxo-1,3-dihydro-isoindole-2-carbonyl.
  • X3 more preferably is selected from a group consisting of 4-amino-3-oxo-azepane-1-carboxylic acid benzyl ester, 4-amino-3-oxo-azepane-1-carboxylic acid isobutyl ester, 4-amino-1-benzoyl-azepan-3-one, 4-amino-1-benzenesulfonyl-azepan-3-one, 4-amino-1-(pyridine-2-sulfonyl)-azepan-3-one, 4-amino-1-(1-oxy-pyridine-2-sulfonyl)-azepan-3-one, 4-amino-1-(3,4-dichloro-benzenesulfonyl)-azepan-3-one, 4-amino-1-(2-flouro-benzenesulfonyl)-azepan-3-one, 4-amino-1-(3,4-dimethoxy-benzenesulfonyl)-azepan-3-one, 4-amino-1-(2-cyano-benzenesulfonyl)-azepan-3-one, 4-amino-1-(naphthalene-1-sulfonyl)-azepan-3-one, 4-amino-1-(thiophene-2-sulfonyl)-azepan-3-one, 4-amino-1-(thiazole-2-sulfonyl)-azepan-3-one, 4-amino-1-(pyrrolidine-1-sulfonyl)-azepan-3-one, 4-amino-1-methanesulfonyl-azepan-3-one, 4-amino-1-(pyrrolidine-1-carbonyl)-azepan-3-one, 4-amino-3-oxo-azepane-1-carboxylic-acid-dimethylamide, 4-amino-3-oxo-azepane-1-carboxylic-acid-benzylamide, 4-amino-1-benzyl-azepan-3-one, 4-amino-1-benzyl-piperidin-3-one, 4-amino-1-benzoyl-piperidin-3-one, 4-amino-1-benzoyl-pyrrolidin-3-one, 4-amino-1-benzyl-pyrrolidin-3-one, 4-amino-1-benzenesulfonyl-pyrrolidin-3-one, 4-amino-1-(5-methyl-hexyl)-pyrrolidin-3-one, 1-ethyl-2-oxo-3-(toluene-4-sulfonylamino)-butylamino, 1-ethyl-2-oxo-3-(4-phenoxy-benzenesulfonylamino)-propylamino, 1-ethyl-2-oxo-3-[4-(pyridin-3-yloxy)-benzenesulfonylamino]-propylamino, 3-(dibenzofuran-2-sulfonylamino)-1-ethyl-2-oxo-butylamino, 1-ethyl-3-[4-methyl-2-(4-methyl-pentanoylamino)-pentanoylamino]-2-oxo-propylamino, 5-amino-1-[(4-methoxy-phenylsulfamoyl)-methyl]-pentylamino, 5-benzyloxycarbonylamino-1-[(4-methoxy-phenylsulfamoyl)-methyl]-pentylamino, 1-[(4-methoxy-phenylsulfamoyl)-methyl]-3-phenyl-propylamino, 1-{[4-(1-hydroxy-ethyl)-phenylsulfamoyl]-methyl)-3-phenyl-propylamino, 1-[(4-acetyl-phenylsulfamoyl)-methyl]-3-phenyl-propylamino, 1-[(4-hydroxy-phenylsulfamoyl)-methyl]-3-phenyl-propylamino and 3-phenyl-1-[(2-phenylamino-ethylsulfamoyl)-methyl]-propylamino; and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof; and the pharmaceutically acceptable salts and solvates of such compounds and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof.
  • Reference to the preferred embodiments set forth above is meant to include all combinations of particular and preferred groups.
  • Particular compounds of the invention may be prepared by joining C* of one of the fragments (A1 to A72) shown in Table 1 to the nitrogen atom (*N) of one of the fragments (B1 to B80) shown in Table 2, and joining the methine carbon atom (CH*) of one of the fragments (B1 to B80) shown in Table 2 to the acyl carbon atom (C*) of one of the fragments (C1 to C37) depicted in Table 3.
    TABLE 1
    A1
    Figure US20070135386A1-20070614-C00006
    Figure US20070135386A1-20070614-C00007
         		A2
    Figure US20070135386A1-20070614-C00008
         		A3
    Figure US20070135386A1-20070614-C00009
         		A4
    Figure US20070135386A1-20070614-C00010
         		A5
    Figure US20070135386A1-20070614-C00011
         		A6
    Figure US20070135386A1-20070614-C00012
         		A7
    Figure US20070135386A1-20070614-C00013
         		A8
    Figure US20070135386A1-20070614-C00014
         		A9
    A10
    Figure US20070135386A1-20070614-C00015
    Figure US20070135386A1-20070614-C00016
         		A11
    Figure US20070135386A1-20070614-C00017
         		A12
    Figure US20070135386A1-20070614-C00018
         		A13
    Figure US20070135386A1-20070614-C00019
         		A14
    Figure US20070135386A1-20070614-C00020
         		A15
    Figure US20070135386A1-20070614-C00021
         		A16
    Figure US20070135386A1-20070614-C00022
         		A17
    Figure US20070135386A1-20070614-C00023
         		A18
    Figure US20070135386A1-20070614-C00024
         		A19
    Figure US20070135386A1-20070614-C00025
         		A20
    Figure US20070135386A1-20070614-C00026
         		A21
    Figure US20070135386A1-20070614-C00027
         		A22
    Figure US20070135386A1-20070614-C00028
         		A23
    Figure US20070135386A1-20070614-C00029
         		A24
    Figure US20070135386A1-20070614-C00030
         		A25
    Figure US20070135386A1-20070614-C00031
         		A26
    Figure US20070135386A1-20070614-C00032
         		A27
    Figure US20070135386A1-20070614-C00033
         		A28
    Figure US20070135386A1-20070614-C00034
         		A29
    Figure US20070135386A1-20070614-C00035
         		A30
    Figure US20070135386A1-20070614-C00036
         		A31
    Figure US20070135386A1-20070614-C00037
         		A32
    Figure US20070135386A1-20070614-C00038
         		A33
    Figure US20070135386A1-20070614-C00039
         		A34
    Figure US20070135386A1-20070614-C00040
         		A35
    Figure US20070135386A1-20070614-C00041
         		A36
    Figure US20070135386A1-20070614-C00042
         		A37
    Figure US20070135386A1-20070614-C00043
         		A38
    Figure US20070135386A1-20070614-C00044
         		A39
    Figure US20070135386A1-20070614-C00045
         		A40
    Figure US20070135386A1-20070614-C00046
         		A41
    Figure US20070135386A1-20070614-C00047
         		A42
    Figure US20070135386A1-20070614-C00048
         		A43
    Figure US20070135386A1-20070614-C00049
         		A44
    Figure US20070135386A1-20070614-C00050
         		A45
    Figure US20070135386A1-20070614-C00051
         		A46
    Figure US20070135386A1-20070614-C00052
         		A47
    Figure US20070135386A1-20070614-C00053
         		A48
    Figure US20070135386A1-20070614-C00054
         		A49
    Figure US20070135386A1-20070614-C00055
         		A50
    Figure US20070135386A1-20070614-C00056
         		A51
    Figure US20070135386A1-20070614-C00057
         		A52
    Figure US20070135386A1-20070614-C00058
         		A53
    Figure US20070135386A1-20070614-C00059
         		A54
    Figure US20070135386A1-20070614-C00060
         		A55
    Figure US20070135386A1-20070614-C00061
         		A56
    Figure US20070135386A1-20070614-C00062
         		A57
    Figure US20070135386A1-20070614-C00063
         		A58
    Figure US20070135386A1-20070614-C00064
         		A59
    Figure US20070135386A1-20070614-C00065
         		A60
    Figure US20070135386A1-20070614-C00066
         		A61
    Figure US20070135386A1-20070614-C00067
         		A62
    Figure US20070135386A1-20070614-C00068
         		A63
    Figure US20070135386A1-20070614-C00069
         		A64
    Figure US20070135386A1-20070614-C00070
         		A65
    Figure US20070135386A1-20070614-C00071
         		A66
    Figure US20070135386A1-20070614-C00072
         		A67
    Figure US20070135386A1-20070614-C00073
         		A68
    Figure US20070135386A1-20070614-C00074
         		A69
    Figure US20070135386A1-20070614-C00075
         		A70
    Figure US20070135386A1-20070614-C00076
         		A71
    Figure US20070135386A1-20070614-C00077
         		A72
  • TABLE 2
    B1
    Figure US20070135386A1-20070614-C00078
    Figure US20070135386A1-20070614-C00079
         		B2
    Figure US20070135386A1-20070614-C00080
         		B3
    Figure US20070135386A1-20070614-C00081
         		B4
    Figure US20070135386A1-20070614-C00082
         		B5
    Figure US20070135386A1-20070614-C00083
         		B6
    Figure US20070135386A1-20070614-C00084
         		B7
    Figure US20070135386A1-20070614-C00085
         		B8
    Figure US20070135386A1-20070614-C00086
         		B9
    B10
    Figure US20070135386A1-20070614-C00087
    Figure US20070135386A1-20070614-C00088
         		B11
    Figure US20070135386A1-20070614-C00089
         		B12
    Figure US20070135386A1-20070614-C00090
         		B13
    Figure US20070135386A1-20070614-C00091
         		B14
    Figure US20070135386A1-20070614-C00092
         		B15
    Figure US20070135386A1-20070614-C00093
         		B16
    Figure US20070135386A1-20070614-C00094
         		B17
    Figure US20070135386A1-20070614-C00095
         		B18
    Figure US20070135386A1-20070614-C00096
         		B19
    Figure US20070135386A1-20070614-C00097
         		B20
    Figure US20070135386A1-20070614-C00098
         		B21
    Figure US20070135386A1-20070614-C00099
         		B22
    Figure US20070135386A1-20070614-C00100
         		B23
    Figure US20070135386A1-20070614-C00101
         		B24
    Figure US20070135386A1-20070614-C00102
         		B25
    Figure US20070135386A1-20070614-C00103
         		B26
    Figure US20070135386A1-20070614-C00104
         		B27
    Figure US20070135386A1-20070614-C00105
         		B28
    Figure US20070135386A1-20070614-C00106
         		B29
    Figure US20070135386A1-20070614-C00107
         		B30
    Figure US20070135386A1-20070614-C00108
         		B31
    Figure US20070135386A1-20070614-C00109
         		B32
    Figure US20070135386A1-20070614-C00110
         		B33
    Figure US20070135386A1-20070614-C00111
         		B34
    Figure US20070135386A1-20070614-C00112
         		B35
    Figure US20070135386A1-20070614-C00113
         		B36
    Figure US20070135386A1-20070614-C00114
         		B37
    Figure US20070135386A1-20070614-C00115
         		B38
    Figure US20070135386A1-20070614-C00116
         		B39
    Figure US20070135386A1-20070614-C00117
         		B40
    Figure US20070135386A1-20070614-C00118
         		B41
    Figure US20070135386A1-20070614-C00119
         		B42
    Figure US20070135386A1-20070614-C00120
         		B43
    Figure US20070135386A1-20070614-C00121
         		B44
    Figure US20070135386A1-20070614-C00122
         		B45
    Figure US20070135386A1-20070614-C00123
         		B46
    Figure US20070135386A1-20070614-C00124
         		B47
    Figure US20070135386A1-20070614-C00125
         		B48
    Figure US20070135386A1-20070614-C00126
         		B49
    Figure US20070135386A1-20070614-C00127
         		B50
    Figure US20070135386A1-20070614-C00128
         		B51
    Figure US20070135386A1-20070614-C00129
         		B52
    Figure US20070135386A1-20070614-C00130
         		B53
    Figure US20070135386A1-20070614-C00131
         		B54
    Figure US20070135386A1-20070614-C00132
         		B55
    Figure US20070135386A1-20070614-C00133
         		B56
    Figure US20070135386A1-20070614-C00134
         		B57
    Figure US20070135386A1-20070614-C00135
         		B58
    Figure US20070135386A1-20070614-C00136
         		B59
    Figure US20070135386A1-20070614-C00137
         		B60
    Figure US20070135386A1-20070614-C00138
         		B61
    Figure US20070135386A1-20070614-C00139
         		B62
    Figure US20070135386A1-20070614-C00140
         		B63
    Figure US20070135386A1-20070614-C00141
         		B64
    Figure US20070135386A1-20070614-C00142
         		B65
    Figure US20070135386A1-20070614-C00143
         		B66
    Figure US20070135386A1-20070614-C00144
         		B67
    Figure US20070135386A1-20070614-C00145
         		B68
    Figure US20070135386A1-20070614-C00146
         		B69
    Figure US20070135386A1-20070614-C00147
         		B70
    Figure US20070135386A1-20070614-C00148
         		B71
    Figure US20070135386A1-20070614-C00149
         		B72
    Figure US20070135386A1-20070614-C00150
         		B73
    Figure US20070135386A1-20070614-C00151
         		B74
    Figure US20070135386A1-20070614-C00152
         		B75
    Figure US20070135386A1-20070614-C00153
         		B76
    Figure US20070135386A1-20070614-C00154
         		B77
    Figure US20070135386A1-20070614-C00155
         		B78
    Figure US20070135386A1-20070614-C00156
         		B79
    Figure US20070135386A1-20070614-C00157
         		B80
  • TABLE 3
    C1
    Figure US20070135386A1-20070614-C00158
    Figure US20070135386A1-20070614-C00159
         		C2
    Figure US20070135386A1-20070614-C00160
         		C3
    Figure US20070135386A1-20070614-C00161
         		C4
    Figure US20070135386A1-20070614-C00162
         		C5
    Figure US20070135386A1-20070614-C00163
         		C6
    Figure US20070135386A1-20070614-C00164
         		C7
    Figure US20070135386A1-20070614-C00165
         		C8
    Figure US20070135386A1-20070614-C00166
         		C9
    C10
    Figure US20070135386A1-20070614-C00167
    Figure US20070135386A1-20070614-C00168
         		C11
    Figure US20070135386A1-20070614-C00169
         		C12
    Figure US20070135386A1-20070614-C00170
         		C13
    Figure US20070135386A1-20070614-C00171
         		C14
    Figure US20070135386A1-20070614-C00172
         		C15
    Figure US20070135386A1-20070614-C00173
         		C16
    Figure US20070135386A1-20070614-C00174
         		C17
    Figure US20070135386A1-20070614-C00175
         		C18
    Figure US20070135386A1-20070614-C00176
         		C19
    Figure US20070135386A1-20070614-C00177
         		C20
    Figure US20070135386A1-20070614-C00178
         		C21
    Figure US20070135386A1-20070614-C00179
         		C22
    Figure US20070135386A1-20070614-C00180
         		C23
    Figure US20070135386A1-20070614-C00181
         		C24
    Figure US20070135386A1-20070614-C00182
         		C25
    Figure US20070135386A1-20070614-C00183
         		C26
    Figure US20070135386A1-20070614-C00184
         		C27
    Figure US20070135386A1-20070614-C00185
         		C28
    Figure US20070135386A1-20070614-C00186
         		C29
    Figure US20070135386A1-20070614-C00187
         		C30
    Figure US20070135386A1-20070614-C00188
         		C31
    Figure US20070135386A1-20070614-C00189
         		C32
    Figure US20070135386A1-20070614-C00190
         		C33
    Figure US20070135386A1-20070614-C00191
         		C34
    Figure US20070135386A1-20070614-C00192
         		C35
    Figure US20070135386A1-20070614-C00193
         		C36
    Figure US20070135386A1-20070614-C00194
         		C37

    Pharmacology and Utility:
  • The compounds of the invention are selective inhibitors of cathepsin S and, as such, are useful for treating diseases in which cathepsin S activity contributes to the pathology and/or symptomatology of the disease. For example, the compounds of the invention are useful in treating autoimmune disorders, including, but not limited to, juvenile onset diabetes, multiple sclerosis, pemphigus vulgaris, Graves' disease, myasthenia gravis, systemic lupus erythemotasus, rheumatoid arthritis and Hashimoto's thyroiditis, allergic disorders, including, but not limited to, asthma, and allogeneic immune responses, including, but not limited to, organ transplants or tissue grafts.
  • Cathepsin S also is implicated in disorders involving excessive elastolysis, such as chronic obstructive pulmonary disease (e.g., emphysema), bronchiolitis, excessive airway elastolysis in asthma and bronchitis, pneumonities and cardiovascular disease such as plaque rupture and atheroma. Cathepsin S is implicated in fibril formation and, therefore, inhibitors of cathepsins S are of use in treatment of systemic amyloidosis.
  • The cysteine protease inhibitory activities of the compounds of the invention can be determined by methods known to those of ordinary skill in the art. Suitable in vitro assays for measuring protease activity and the inhibition thereof by test compounds are known. Typically, the assay measures protease induced hydrolysis of a peptide based substrate. Details of assays for measuring protease inhibitory activity are set forth in Examples 14-17, infra.
  • Administration and Pharmaceutical Compositions:
  • In general, compounds of Formula I will be administered in therapeutically effective amounts via any of the usual and acceptable modes known in the art, either singly or in combination with one or more therapeutic agents. A therapeutically effective amount may vary widely depending on the severity of the disease, the age and relative health of the subject, the potency of the compound used and other factors. For example, therapeutically effective amounts of a compound of Formula I may range from about 1 micrograms per kilogram body weight (μg/kg) per day to about 1 milligram per kilogram body weight (mg/kg) per day, typically from about 10 μg/kg/day to about 0.1 mg/kg/day. Therefore, a therapeutically effective amount for a 80 kg human patient may range from about 100 μg/day to about 100 mg/day, typically from about 1 μg/day to about 10 mg/day. In general, one of ordinary skill in the art, acting in reliance upon personal knowledge and the disclosure of this Application, will be able to ascertain a therapeutically effective amount of a compound of Formula I for treating a given disease.
  • The compounds of Formula I can be administered as pharmaceutical compositions by one of the following routes: oral, systemic (e.g., transdermal, intranasal or by suppository) or parenteral (e.g., intramuscular, intravenous or subcutaneous). Compositions can take the form of tablets, pills, capsules, semisolids, powders, sustained release formulations, solutions, suspensions, elixirs, aerosols, or any other appropriate composition and are comprised of, in general, a compound of Formula I in combination with at least one pharmaceutically acceptable excipient. Acceptable excipients are non-toxic, aid administration, and do not adversely affect the therapeutic benefit of the active ingredient. Such excipient may be any solid, liquid, semisolid or, in the case of an aerosol composition, gaseous excipient that is generally available to one of skill in the art.
  • Solid pharmaceutical excipients include starch, cellulose, talc, glucose, lactose, sucrose, gelatin, malt, rice, flour, chalk, silica gel, magnesium stearate, sodium stearate, glycerol monostearate, sodium chloride, dried skim milk, and the like. Liquid and semisolid excipients may be selected from water, ethanol, glycerol, propylene glycol and various oils, including those of petroleum, animal, vegetable or synthetic origin (e.g., peanut oil, soybean oil, mineral oil, sesame oil, and the like). Preferred liquid carriers, particularly for injectable solutions, include water, saline, aqueous dextrose and glycols.
  • The amount of a compound of Formula I in the composition may vary widely depending upon the type of formulation, size of a unit dosage, kind of excipients and other factors known to those of skill in the art of pharmaceutical sciences. In general, a composition of a compound of Formula I for treating a given disease will comprise from 0.01% w to 10% w, preferably 0.3% w to 1% w, of active ingredient with the remainder being the excipient or excipients. Preferably the pharmaceutical composition is administered in a single unit dosage form for continuous treatment or in a single unit dosage form ad libitum when relief of symptoms is specifically required. Representative pharmaceutical formulations containing a compound of Formula I are described in Example 10, infra.
  • Chemistry:
  • Processes for Making Compounds of Formula I:
  • Compounds of the invention may be prepared by the application or adaptation of known methods, by which is meant methods used heretofore or described in the literature, for example those described by R. C. Larock in Comprehensive Organic Transformations, VCH publishers, 1989.
  • In the reactions described hereinafter it may be necessary to protect reactive functional groups, for example hydroxy, amino, imino, thio or carboxy groups, where these are desired in the final product, to avoid their unwanted participation in the reactions. Conventional protecting groups may be used in accordance with standard practice, for examples see T. W. Greene and P. G. M. Wuts in “Protective Groups in Organic Chemistry” John Wiley and Sons, 1991.
  • Compounds of Formula I, in which X3 is a compound of formula (a) (as defined in the Summary of the Invention), can be prepared by proceeding as in the following Reaction Scheme 1:
    Figure US20070135386A1-20070614-C00195
    in which each X1, X2, R3, R4, R20 and R21 are as defined for Formula I in the Summary of the Invention.
  • Compounds of Formula I can be prepared by condensing an acid of Formula 2 with an amino compound of formula (a). The condensation reaction can be effected with an appropriate coupling agent (e.g., benzotriazol-1-yloxytrispyrrolidinophosphonium hexafluorophosphate (PyBOP®), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HBTU), 1,3-dicyclohexylcarbodiimide (DCC), or the like) and optionally an appropriate catalyst (e.g., 1-hydroxybenzotriazole (HOBt), 1-hydroxy-7-azabenzotriazole (HOAt), O-(7-azabenzotrizol-1-yl)-1,1,3,3, tetra-methyluroniumhexafluorophosphate (HATU), or the like) and non-nucleophilic base (e.g., triethylamine, N-methylmorpholine, and the like, or any suitable combination thereof) at ambient temperature and requires 5 to 10 hours to complete.
  • An oxidation step, if required, can be carried out with an oxidizing agent (e.g., Oxone®, metachloroperbenzoic acid or the like) in a suitable solvent (e.g., methanol, water, or the like, or any suitable combination thereof) at ambient temperature and requires 16 to 24 hours to complete. Detailed descriptions for the synthesis of a compound of Formula I by the processes in Reaction Scheme 1 are set forth in the Examples 1 to 11, infra.
  • Compounds of Formula I, where X3 is a compound of formula (b) (as defined in the Summary of the Invention), can be prepared by proceeding as in the following Reaction Scheme 2:
    Figure US20070135386A1-20070614-C00196
    in which each X1, X2, R3, R4, R20, R23 and R25 are as defined for Formula I in the Summary of the Invention.
  • Compounds of Formula I can be prepared by condensing an acid of Formula 2 with an amino compound of formula (b). The condensation reaction can be effected with an appropriate coupling agent (e.g., benzotriazol-1-yloxytrispyrrolidinophosphonium hexafluorophosphate (PyBOP®), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HBTU), 1,3-dicyclohexylcarbodiimide (DCC), or the like) and optionally an appropriate catalyst (e.g., 1-hydroxybenzotriazole (HOBt), 1-hydroxy-7-azabenzotriazole (HOAt), O-(7-azabenzotrizol-1-yl)-1,1,3,3, tetra-methyluroniumhexafluorophosphate (HATU), or the like) and non-nucleophilic base (e.g., triethylamine, N-methylmorpholine, and the like, or any suitable combination thereof) at ambient temperature and requires 5 to 10 hours to complete.
  • An oxidation step, if required, can be carried out with an oxidizing agent (e.g., Oxone®, metachloroperbenzoic acid or the like) in a suitable solvent (e.g., methanol, water, or the like, or any suitable combination thereof at ambient temperature and requires 16 to 24 hours to complete.
  • Compounds of Formula 1 in which X3 is a compound of formula (c) (as defined in the Summary of the Invention), can be prepared by reacting a compound of Formula 2 with a compound of Formula (c) according to the following reaction scheme:
    Figure US20070135386A1-20070614-C00197
    in which each X1, x2, R3, R4, R20, R23 and R25 are as defined for Formula I in the Summary of the Invention.
    Additional Processes for Preparing Compounds of Formula I:
  • A compound of Formula I can be prepared as a pharmaceutically acceptable acid addition salt by reacting the free base form of the compound with a pharmaceutically acceptable inorganic or organic acid. Alternatively, a pharmaceutically acceptable base addition salt of a compound of Formula I can be prepared by reacting the free acid form of the compound with a pharmaceutically acceptable inorganic or organic base. Inorganic and organic acids and bases suitable for the preparation of the pharmaceutically acceptable salts of compounds of Formula I are set forth in the definitions section of this Application. Alternatively, the salt forms of the compounds of Formula I can be prepared using salts of the starting materials or intermediates.
  • The free acid or free base forms of the compounds of Formula I can be prepared from the corresponding base addition salt or acid addition salt form. For example, a compound of Formula I in an acid addition salt form can be converted to the corresponding free base by treating with a suitable base (e.g., ammonium hydroxide solution, sodium hydroxide, and the like). A compound of Formula I in a base addition salt form can be converted to the corresponding free acid by treating with a suitable acid (e.g., hydrochloric acid, etc).
  • The N-oxides of compounds of Formula I can be prepared by methods known to those of ordinary skill in the art. For example, N-oxides can be prepared by treating an unoxidized form of the compound of Formula I with an oxidizing agent (e.g., trifluoroperacetic acid, permaleic acid, perbenzoic acid, peracetic acid, meta-chloroperoxybenzoic acid, or the like) in a suitable inert organic solvent (e.g., a halogenated hydrocarbon such as dichloromethane) at approximately 0° C. Alternatively, the N-oxides of the compounds of Formula I can be prepared from the N-oxide of an appropriate starting material.
  • Compounds of Formula I in unoxidized form can be prepared from N-oxides of compounds of Formula I by treating with a reducing agent (e.g., sulfur, sulfur dioxide, triphenyl phosphine, lithium borohydride, sodium borohydride, phosphorus trichloride, tribromide, or the like) in an suitable inert organic solvent (e.g., acetonitrile, ethanol, aqueous dioxane, or the like) at 0 to 80° C.
  • Prodrug derivatives of the compounds of Formula I can be prepared by methods known to those of ordinary skill in the art (e.g., for further details see Saulnier et al. (1994), Bioorganic and Medicinal Chemistry Letters, Vol. 4, p. 1985). For example, appropriate prodrugs can be prepared by reacting a non-derivatized compound of Formula I with a suitable carbamylating agent (e.g., 1,1-acyloxyalkylcarbonochloridate, para-nitrophenyl carbonate, or the like).
  • Protected derivatives of the compounds of Formula I can be made by means known to those of ordinary skill in the art. A detailed description of the techniques applicable to the creation of protecting groups and their removal can be found in T. W. Greene, Protecting Groups in Organic Synthesis, 3rd edition, John Wiley & Sons, Inc. 1999. Compounds of the present invention may be conveniently prepared, or formed during the process of the invention, as solvates (e.g. hydrates). Hydrates of compounds of the present invention may be conveniently prepared by recrystallisation from an aqueous/organic solvent mixture, using organic solvents such as dioxin, tetrahydrofuran or methanol. Compounds of Formula I can be prepared as their individual stereoisomers by reacting a racemic mixture of the compound with an optically active resolving agent to form a pair of diastereoisomeric compounds, separating the diastereomers and recovering the optically pure enantiomer. While resolution of enantiomers can be carried out using covalent diasteromeric derivatives of compounds of Formula I, dissociable complexes are preferred (e.g., crystalline diastereoisomeric salts). Diastereomers have distinct physical properties (e.g., melting points, boiling points, solubilities, reactivity, etc.) and can be readily separated by taking advantage of these dissimilarities. The diastereomers can be separated by chromatography or, preferably, by separation/resolution techniques based upon differences in solubility. The optically pure enantiomer is then recovered, along with the resolving agent, by any practical means that would not result in racemization. A more detailed description of the techniques applicable to the resolution of stereoisomers of compounds from their racemic mixture can be found in Jean Jacques Andre Collet, Samuel H. Wilen, Enantiomers, Racemates and Resolutions, John Wiley & Sons, Inc. (1981).
  • In summary, the compounds of Formula I are made by a process which comprises:
    • (A) reacting a compound of Formula 2:
      Figure US20070135386A1-20070614-C00198
      with a compound of the formula (a):
      Figure US20070135386A1-20070614-C00199
      • in which X1, X2, R3, R4, R20 and R21 are as defined in the Summary of the Invention for Formula I; or
    • (B) reacting a compound of Formula 2 with a compound of the formula (b):
      Figure US20070135386A1-20070614-C00200
      in which R20, R23 and R25 are as defined in the Summary of the Invention for Formula I; or
    • (C) reacting a compound of Formula 2 with a compound of the formula (c):
      Figure US20070135386A1-20070614-C00201
      • in which R20, R23 and R25 are as defined in the Summary of the Invention for Formula I; and
    • (D) optionally converting a compound of Formula I into a pharmaceutically acceptable salt;
    • (E) optionally converting a salt form of a compound of Formula I to non-salt form;
    • (F) optionally converting an unoxidized form of a compound of Formula I into a pharmaceutically acceptable N-oxide;
    • (G) optionally converting an N-oxide form of a compound of Formula I its unoxidized form;
    • (H) optionally resolving an individual isomer of a compound of Formula I from a mixture of isomers;
    • (I) optionally converting a non-derivatized compound of Formula I into a pharmaceutically prodrug derivative; and
    • (J) optionally converting a prodrug derivative of a compound of Formula I to its non-derivatized form.
    EXAMPLES
  • The present invention is further exemplified, but not limited by, the following examples that illustrate the preparation of compounds of Formula I (Examples) and intermediates (References) according to the invention.
    • Reference 1 3-amino-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester
  • 6-Oxa-3-aza-bicyclo[3.1.0]hexane-3-carboxylic acid tert-butyl ester (12.1 g, 65.3 mmol) was dissolved in a 8:1 methanol/water mixture (108 mL). Ammonium chloride (15 g) and sodium azide (21.4 g, 329 mmol) was added and the mixture was heated at 60° C. overnight. After dilution with ether (500 mL), the mixture was washed with saturated aqueous NaHCO3 (200 mL) and brine (200 mL), dried with MgSO4 and evaporated under vacuum. The crude product was dissolved in methanol (200 mL). 10% Palladium on activated carbon (1.5 g) was added and the mixture was stirred at ambient temperature under a hydrogen atmosphere until TLC analysis showed the disappearance of the starting material. The mixture was filtered through a pad of Celite and evaporated to dryness under vacuum. The product was purified by flash chromatography on silica gel. Eluent: 5% methanol in ethyl acetate to 20% methanol, 3% triethylamine in ethyl acetate. Yield: 4.3 g 3-amino-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester as yellowish solid.
    • Reference 2 4-Amino-3-hydroxy-azepane-1-carboxylic acid benzyl ester
  • Sodium hydride (60% in mineral oil, 10 g, 250 mmol) was suspended in dry DMF. Allyl-carbamic acid benzyl ester (19.1 g, 100 mmol) was added drop wise at ambient temperature. After stirring for 5 minutes, 5-bromo-1-pentene (25 g, 168 mmol) was added drop wise. Stirring was continued at 50° C. for 1 hour. The reaction was quenched with water and then partitioned between diethyl ether and water. The ether layer was washed with water and brine, dried with MgSO4 and evaporated under vacuum. Flash chromatography (ethyl acetatelhexane 1:9) gave allyl-pent-4-enyl-carbamic acid benzyl ester (15.5 g).
  • Allyl-pent-4-enyl-carbamic acid benzyl ester (15.5 g, 59.8 mmol) was dissolved in dichloromethane and bis(tricyclohexylphosphine)benzylidene ruthenium(IV) dichloride (Ig) was added. The mixture was refluxed under a nitrogen atmosphere until TLC analysis showed complete reaction. The solvent was evaporated under vacuum and the residue was purified by flash chromatography (ethyl acetate/hexane 1:9) to give 2,3,4,7-Tetrahydro-azepine-1-carboxylic acid benzyl ester (7.8 g).
  • To a solution of 2,3,4,7-tetrahydro-azepine-1-carboxylic acid benzyl ester (4.5 g, 19.45 mmol) in dichloromethane (50 mL) was added m-chloroperbenzoic acid (60 mmol). The mixture was stirred at ambient temperature for 16 hours. Saturated aqueous K2CO3 solution was added and the mixture was extracted with dichloromethane. The combined organic layers were washed with saturated aqueous NaHCO3 and brine, dried with MgSO4 and evaporated under vacuum. The crude epoxide was dissolved in an 8:1 methanol/water mixture (100 mL). Ammonium chloride (3.2 g, 60 mmol) and sodium azide (3.9 g, 60 mmol) were added and the mixture was heated at 60° C. for 48 hours. Most of the solvent was removed under vacuum. The residue was extracted with ethyl acetate. The combined organic layers were washed with saturated aqueous NaHCO3 (200 mL) and brine (200 mL), dried with MgSO4 and evaporated under vacuum. Flash chromatography of the residue (hexane/ethyl acetate 3:1) gave 4-azido-3-hydroxy-azepane-1-carboxylic acid benzyl ester (3.3 g).
  • To a solution of 4-azido-3-hydroxy-azepane-1-carboxylic acid benzyl ester (3.3 g, 11.37 mmol) in methanol (50 mL) was added triethylamine (5 mL) and 1,3-propanedithiol (3.42 mL, 35 mmol). The mixture was stirred at ambient temperature until TLC analysis showed complete consumption of the starting material. A white precipitate was removed by filtration and the filtrate was evaporated to dryness. The residue was triturated with a 1:1 hexane/diethyl ether mixture to remove excess dithiol and dried under vacuum to yield 4-amino-3-hydroxy-azepane-1-carboxylic acid benzyl ester.
    • Reference 3 2S-Amino-N-(4-methoxyphenyl)-4-phenylbutane-1-sulfonamide hydrochloride
  • A solution comprised of crude tert-butyl 1-(4-methoxyphenylsulfamoylmethyl)-3-phenylpropylcarbamate (1.92 g, 4.42 mmol), prepared as in Reference Example 2, in DCM (10 mL) was treated with a 4M solution of hydrogen chloride in dioxane (11 mL). The mixture was stirred for 16 hours at room temperature and diluted with diethyl ether. A resulting precipitate was collected by filtration, washed several times with diethyl ether and hexane and pumped dry to provide 2S-amino-N-4-methoxyphenyl-4-phenylbutane-1-sulfonamide hydrochloride with quantitative mass recovery. 1H NMR (DMSO): 2.05 (2H, m); 2.6-2.7 (2H, m); 3.4 (3H, m*); 3.72 (3H, s); 6.9 (2H, d, J=7 Hz); 7.25 (5H, m); 7.3 (2H, d, J=7 Hz); 8.5 (br. s); 10.0 (1H, s).
    • Example 1 Morpholine-4-carboxylic acid [1-(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide Compound 1
  • Figure US20070135386A1-20070614-C00202
  • 2-[(Morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid (1 g, 2.8 mmol), 3-amino-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester (700 mg, 3.46 mmol) prepared as in Reference 1, EDC (1.5 g, 7.8 mmol), and HOBt (1.5 g, 9.6 mmol) were combined. Dichloromethane (10 mL) was added and then 4-methylmorpholine (1.5 mL). The mixture was stirred at ambient temperature for 2 hours. After dilution with ethyl acetate (200 mL) the solution was washed with saturated aqueous NaHCO3 (100 mL) and brine (100 mL), dried with MgSO4 and evaporated under vacuum. 3-Hydroxy-4-{2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionylamino}-pyrrolidine-1-carboxylic acid tert-butyl ester (1.05 g, 1.94 mmol) was obtained as yellowish foam and was dissolved in dichloromethane (6 mL). Trifluoroacetic acid (6 mL) was added and the mixture was stirred at ambient temperature for 1 hour. Evaporation under vacuum gave crude morpholine-4-carboxylic acid [1-(4-hydroxy-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide as TFA salt, which was used without further purification.
  • Morpholine-4-carboxylic acid [1-(4-hydroxy-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide TFA salt (215 mg, 0.39 mmol) was dissolved in 1,4-dioxane (20 mL). Saturated aqueous NaHCO3 solution (10 mL) was added followed by benzoyl chloride (0.2 mL, 1.72 mmol). The mixture was stirred at ambient temperature for 1 hour and then extracted with ethyl acetate. The combined organic layers were washed with saturated aqueous NaHCO3 and brine, dried with MgSO4 and evaporated under vacuum. The residue was purified by flash chromatography on silica gel (Eluent: 5% methanol in ethyl acetate to 20% methanol in ethyl acetate) to yield morpholine-4-carboxylic acid [1-(1-benzoyl-4-hydroxy-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide (92 mg).
  • Morpholine-4-carboxylic acid [1-(1-benzoyl-4-hydroxy-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide (92 mg, 0.169 mmol) was dissolved in DMSO (5 mL). Triethylamine (0.5 mL) and then SO3 pyridine complex (150 mg) were added and the mixture was stirred at ambient temperature for 3 hours. After dilution with ethyl acetate (100 mL), the solution was washed with water (50 mL) and brine, dried with MgSO4 and evaporated under vacuum. The residue was purified by flash chromatography on silica gel (Eluent: 5% methanol in ethyl acetate) to yield morpholine-4-carboxylic acid [1-(1-benzoyl-4-oxo-pyrrolidin-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide as a mixture of diastereomers (Yellowish solid; 38 mg); 1H NMR: (DMSO) 8.50-8.35 (m, 1H), 7.55-7.34 (m, 10H), 7.16-6.95 (m, 1H), 4.80-4.65 (m, 1H), 4.54-4.22 (m, 3H), 3.98-3.25 (m, 14H); MS: (M+H)+ 543.
    • Example 2 Morpholine-4-carboxylic acid [1-(1-benzenesulfonyl-4-oxo-pyrrolidin-3-ylcarbamoyl) 2-phenylmethanesulfonyl-ethyl]-amide Compound 2
  • Figure US20070135386A1-20070614-C00203
  • Morpholine-4-carboxylic acid [1-(1-benzenesulfonyl-4-oxo-pyrrolidin-3-ylcarbamoyl) 2-phenylmethanesulfonyl-ethyl]-amide was prepared following the procedure detailed in Example 1, substituting benzenesulfonyl chloride for benzoyl chloride; 1H NMR: (DMSO) [8.35 (d, J=7.4 Hz), 8.28 (d, J=7.6 Hz), 1H], 7.87-7.62 (m, 5H), 7.41-7.32 (m, 5H), 7.06-6.98 (m, 1H), 4.72-4.60 (m, 1H), 4.45 (s, 2H), 4.42-4.23 (m, 1H), 3.92-3.79 (m, 2H), 3.55-3.20 (m, 11H), 3.06-2.97 (m, 1H). MS: (M+H)+ 579.
    • Example 3 4-2-[(Morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionylamino}-3-oxo-azepane-1-carboxylic acid benzyl ester Compound 3
  • Figure US20070135386A1-20070614-C00204
  • Crude 4-amino-3-hydroxy-azepane-1-carboxylic acid benzyl ester (150 mg, 0.57 mmol) prepared as in Reference 2, 2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid (400 mg, 1.12 mmol), EDC (400 mg, 2.1 mmol), and HOBt (400 mg, 2.5 mmol) were combined. Dichloromethane (10 mL) was added followed by 4-methylmorpholine (0.5 mL). The mixture was stirred at ambient temperature for 2 hours. After dilution with ethyl acetate (100 mL) the solution was washed with 1N HCl, saturated aqueous NaHCO3 and brine, dried with MgSO4 and evaporated under vacuum. The residue was purified by flash chromatography (ethyl acetate/methanol 9:1) to yield 3-hydroxy-4-{2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionyl-amino}-azepane-1-carboxylic acid benzyl ester (320 mg).
  • 3-Hydroxy-4-{2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionylamino}-azepane-1-carboxylic acid benzyl ester (100 mg, 0.167 mmol) was dissolved in DMSO (5 mL). Triethylamine (0.3 mL) and then SO3 pyridine complex (150 mg) were added and the mixture was stirred at ambient temperature for 3 hours. After dilution with ethyl acetate (100 mL), the solution was washed with water (50 mL) and brine, dried with MgSO4 and evaporated under vacuum. The residue was purified by flash chromatography on silica gel (Eluent: 5% methanol in ethyl acetate) to yield 4-{2-[(morpholine-4-carbonyl)-amino]-3-Dhenylmethanesulfonyl-propionylamino}-3-oxo-azepane-1-carboxylic acid benzyl ester (75 mg); 1H NMR: (DMSO) 8.23-8.08 (m, 1H), 7.40-7.29 (m, 10H), 7.06-6.98 (m, 1H), 5.20-5.09 (m, 2H), 4.79-4.65 (m, 1H), 4.52-4.31 (m, 3H), 4.02-3.80 (m, 2H), 3.62-3.23 (m, 11H), 3.00-2.78 (m, 1H), 1.88-1.55 (m, 4H); MS: (M+H)+ 601.
    • Example 4 Morpholine-4-carboxylic acid [1-(3-benzenesulfonylamino-2-oxo-prolylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide Compound 4
  • Figure US20070135386A1-20070614-C00205
  • N-(3-Amino-2-hydroxy-propyl)-benzenesulfonamide TFA salt was prepared as outlined in Renee L. DesJarlais et al. J. Am. Chem. Soc. 1998, 120, 9114-9115.
  • 2-[(Morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid (50 mg, 0.14 mmol), N-(3-amino-2-hydroxy-propyl)-benzenesulfonamide TFA salt (60 mg, 0.17 mmol), EDC (100 mg, 0.52 mmol), and HOBt (100 mg, 0.64 mmol) were combined. DMF (3 mL) was added and then 4-methylmorpholine (0.3 mL). The mixture was stirred at ambient temperature for 3 hours. After dilution with ethyl acetate (100 mL) the solution was washed with 1N HCl, saturated aqueous NaHCO3 and brine, dried with MgSO4 and evaporated under vacuum. The residue was dissolved in acetone (5 mL). Jones reagent was added until the orange color persisted. The mixture was stirred for 2 hours, quenched with isopropanol, and diluted with ethyl acetate (100 mL). The solution was washed with water, saturated aqueous NaHCO3 and brine, dried with MgSO4 and evaporated under vacuum. The crude product was recrystallized from ethyl acetate/diethyl ether to give morpholine-4-carboxylic acid [1-(3-benzenesulfonylamino-2-oxo-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide as white solid (19 mg); 1H NMR: (DMSO) 8.17 (t, J=5.7 Hz, 1H), 7.93 (t, J=5.9 Hz, 1H), 7.76-7.48 (m, 5H), 7.36-7.29 (m, 5H), 7.05 (d, J=8.1 Hz, 1H), 4.68-4.59 (m, 1H), 4.45 (s, 2H), 3.89 (d, J=5.7 Hz, 2H), 3.79-3.75 (m, 2H), 3.56-3.22 (m, 10H); MS: (M+H)+ 567.
    • Example 5 N-{1S-[1S-(4-Methoxyphenylsulfamoylmethyl)-3-phenylpropylcarbamoyl]2-benzylsulfonylethyl}-morpholine-4-carboxamide Compound 7
  • Figure US20070135386A1-20070614-C00206
  • A mixture comprised of 2S-morpholin-4-ylcarbonylamino-3-benzylsulfonyl-propionic acid (0.194 g, 0.599 mmol), 2S-amino-N-(4-methoxyphenyl)-4-phenylbutane-1-sulfonamide hydrochloride (0.222 g, 0.599 mmol), prepared as in Reference 3, and HATU (0.228 g, 0.599 mmol) in DMF (5 mL) was treated with 4-methylmorpholine (0.198 g, 1.80 mmol). The mixture was stirred at room temperature for approximately 12 hours and then partitioned among a 4:1:2:3 mixture (100 mL total) of ethyl acetate, THF, water, and brine, respectively. The organic phase was separated and washed with saturated aqueous sodium bicarbonate (30 mL), brine (30 mL), dried (MgSO4), filtered and concentrated. The residue was triturated with of 5:1 ether/ethyl acetate (100 mL), collected by filtration, washed with ether (30 mL), hexane (30 mL), and pumped dry to provide N-{1S-[1S-(4-methoxyphenylsulfamoylmethyl)-3-phenylpropylcarbamoyl]-2-benzylsulfonylethyl}-morpholine-4-carboxamide. TLC Rf (ethyl acetate): 0.65; 1H NMR (DMSO): 1.74 (1H, m); 1.92 (1H, m); 2.39-2.61 (2H, m); 3.1-3.35 (2H, 2×dd*); 3.34 (4H, m); 3.42-3.65 (6H, m*); 3.72 (3H, s); 4.24 (1H, m); 4.51 (2H, s); 4.61 (1H, m); 6.88 (2H, d, J=9 Hz); 7.1-7.34 (8H, m); 7.4 (5H, s); 8.12 (1H, d, J=8.7 Hz); MS (M+1): 673.
  • Proceeding as in Example 5 the following compounds of Formula I were prepared:
  • N-{1S-[5-amino-1S-(4-methoxyphenylsulfamoyl-methyl)pentylcarbamoyl}-2-benzylsulfonylethyl-morpholine-4-carboxamide hydrobromide (Compound 5); 1H NMR (DMSO): 1.15-1.73 (6H, m*); 2.71 (2H, m); 3.05-3.25 (2H, 2×dd); 3.37 (4H, m); 3.45-3.6 (6H, m*); 3.72 (3H, s); 4.21 (1H, m); 4.49 (2H, dd); 4.5 (1H, m*); 6.89 (2H, d, J=8.9 Hz); 7.09 (1H, m*); 7.15 (2H, d, J=8.9 Hz); 7.39 (5H, s); 7.73 (3H, br. s); 8.03 (1H, d, J=8.6 Hz); 9.47 (1H, s); MS (M+1): 640, free base); and
  • Benzyl 6-(4-methoxyphenylsulfamoyl)-5S-(2S-morpholin-4-ylcarbonylamino-3-benzylsulfonyl-propionylamino)hexylcarbamate (Compound 6); TLC Rf (ethyl acetate): 0.3; 1H NMR (DMSO): 1.1-1.65 (6H, m); 2.94 (2H, q, J=6 Hz); 3.05-3.22 (2H, 2×dd); 3.34 (4H, m*); 3.35-3.59 (2H, m*); 3.53 (4H, br s); 3.71 (3H, s); 4.19 (1H, m*); 4.53 (2H, dd, J=15 Hz); 4.57 (1H, m*); 5.00 (2H, s); 6.89 (2H, d, J=8.4 Hz); 7.05 (1H, d, J=8 Hz); 7.15 (2H, d, J=8.4 Hz); 7.24 (1H, t); 7.3-7.45 (10H, 2×s); 7.99 (1H, J=8 Hz); MS (M+): 774.
    • Example 6 Morpholine-4-carboxylic acid [(R)-1-(6-oxo-cyclohex-1-enylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide Compound 8
  • Figure US20070135386A1-20070614-C00207
  • A solution of 2-amino-cyclohexane-1,3-diol (0.55 g) in dimethylformamide (30 ml) was treated with diisopropylethylamine (1.6 ml, 9.2 mmol). After stirring at room temperature for 5 minutes the mixture was treated with (R)-2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid (1.73 g, 4.86 mmol) followed by HATU (1.68 g, 4.42 mmol). This mixture was stirred at room temperature overnight and then evaporated. The residue was subjected to flash chromatography on silica eluting with ethyl acetate and then a mixture of ethyl acetate and methanol to give morpholine-4-carboxylic acid [(R)-1-(2,6-dihydroxy-cyclohexylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide as a white solid (210 mg). MS: 470 (MH+).
  • A solution of morpholine-4-carboxylic acid [(R)-1-(2,6-dihydroxy-cyclohexylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide (90 mg, 0.19 mmol) in methylene chloride (6 ml) was treated with Dess-Martin periodinane (162 mg, 0.38 mmol). After stirring at room temperature for 2 hours the reaction mixture was washed with a solution of Na2S2O3 in water (0.26M), then with saturated aqueous bicarbonate solution then with water, then dried over Na2SO4 and then evaporated under reduced pressure. The residue was subjected to flash chromatography on silica eluting with a mixture of ethyl acetate and heptane to give morpholine-4-carboxylic acid [(R)-1-(6-oxo-cyclohex-1-enylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide (8 mg). 1H NMR (CDCl3): 9.00 (s, 1H), 7.82 (t, J=5 Hz, 1H), 7.53-7.38 (m, 5H), 6.06 (d, J=6 Hz, 1H), 5.00 (m, 1H), 4.47-4.27 (m, 2H), 3.85 (m, 1H), 3.77-3.62 (m, 4H), 3.48-3.36 (m, 4H), 3.27 (m, 1H), 2.58-2.46 (m, 4H), 2.08-1.97 (m, 2H). MS: 450 (MH+).
    • Example 7 Morpholine-4-carboxylic acid [(R)-2-cyclopropylmethanesulfonyl-1-(6-oxo-cyclohex-1-enylcarbamoyl)-ethyl]-amide Compound 9
  • Figure US20070135386A1-20070614-C00208
  • A mixture of (R)-3-cyclopropylmethanesulfonyl-2-[(morpholine-4-carbonyl)-amino]-propionic acid (0.352 g, 1.1 mmol) and N-cyclohexylcarbodiimide N′-methylpolystyrene (1.93 mmol/g, 1.03 g) in DCM (10 mL) was treated with hydroxybenzotriazole (0.27 g, 2 mmol). After stirring at room temperature for 5 minutes the mixture was treated with 2-amino-cyclohexane-1,3-diol (0.0.131 g, 1 mmol) and stirring was continued for a further 2 days. The reaction mixture was treated with PS Trisamine (3.75 mmol/g, 1.3 g) and after stirring at room temperature for 2 hours the resin was filtered off and washed with DCM. The combined filtrate plus washings were evaporated under reduced pressure to give morpholine-4-carboxylic acid [(R)-2-cyclopropylmethanesulfonyl-1-(2,6-dihydroxy-cyclohexylcarbamoyl)-ethyl]-amide (0.32 g) as pale yellow thick oil. MS: 434 (MH+).
  • Dess Martin Periodinane (0.688 g, 1.62 mmol) was added to a solution of the [(R)-2-cyclopropylmethanesulfonyl-1-(2,6-dihydroxy-cyclohexylcarbamoyl)-ethyl]-amide (0.32 g) in DCM (10 mL) and the mixture was stirred at room temperature for 3 hours then treated with resin bound Na2S2O3 (1.5 mmol/g, 1.9 g) and stirred at room temperature for a further 24 hours. The reaction mixture was diluted with DCM (20 mL), then filtered. The filtrate was washed with a solution of 0.25 M Na2S2O3, then with saturated NaHCO3, then dried (MgSO4), and then evaporated under reduced pressure. The residue was subjected to column chromatography elufing with a mixture of ethyl acetate and heptane to give morpholine-4-carboxylic acid [(R)-2-cyclopropylmethanesulfonyl-1-(6-oxo-cyclohex-1-enylcarbamoyl)-ethyl]-amide. 1H NMR (CDCl3): 9.00 (s, 1H), 7.78 (t, 1H), 6.18 (d, 1H), 4.9 (m, 1H), 3.85 (m, 1H), 3.77-3.62 (m, 4H), 3.58-3.45 (dd, 1H), 3.48-3.36 (m, 4H), 3.0 (d, 2H), 2.55-2.42 (m, 4H), 2.08-1.97 (m, 2H), 1.2 (m, 1H), 0.8-0.7 (m, 2H), 0.6-0.4 (m, 2H). MS: 414 (MH+).
    • Example 8 Morpholine-4-carboxylic acid [(R)-1-(3,4-dioxo-cyclopentylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide Compound 10
  • Figure US20070135386A1-20070614-C00209
  • A solution of 4-amino-cyclopentane-1,2-diol; compound with trifluoroacetic acid (745 mg, 3.23 mmol) in DMF (15 ml) was treated with DIPEA (1.12 ml, 6.4 mmol) and the mixture was stirred for 5 minutes at room temperature. Then (R)-2-[(Morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid (1.15 g, 3.23 mmol) was added followed by HATU (1.23 g, 3.24 mmol). This mixture was stirred at room temperature overnight and then evaporated. The residue was subjected to flash chromatography on silica eluting with ethyl acetate and then with a mixture of ethyl acetate and methanol to give morpholine-4-carboxylic acid [(R)-1-(3,4-dihydroxy-cyclopentylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide as a brown solid (680 mg). LC/MS: RT=2.64 min. (215 and 254 nM), MH+=456.
  • A solution of morpholine-4-carboxylic acid [(R)-1-(3,4-dihydroxy-cyclopentylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide (670 mg, 1.47 mmol) in methylene chloride (40 ml) was treated with Dess-Martin periodinane (624 mg, 1.47 mmol) and the reaction stirred at room temperature overnight. More Dess-Martin periodinane (642 mg, 1.51 mmol) was added and the reaction stirred at room temperature for 6 hours and then overnight. The reaction mixture was washed with a solution of Na2S2O3 in water (0.26M), then with saturated aqueous bicarbonate solution, then with water, then dried over Na2SO4 and then evaporated under reduced pressure. The residue was subjected to flash chromatography on silica eluting with a mixture of ethyl acetate and heptane, then with ethyl acetate to give morpholine-4-carboxylic acid [(R)-1-(3,4-dioxo-cyclopentylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide as an off white solid (45 mg). 1H NMR (CDCl3): 7.50-7.38 (m, 5H), 6.62 (m, 1H), 5.91 (d, J=5 Hz, 1H), 4.81 (m, 1H), 4.58-4.35 (m, 3H), 3.73-3.61 (m, 5H), 3.44-3.32 (m, 4H), 3.22 (m, 1H), 2.72-2.12 (m, 4H). MS: 452 (MH+).
    • Example 9 Morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phenylmethanesulfonyl)-1-(2-oxo-cyclohexylcarbamoyl)-ethyl]-amide Compound 11
  • Figure US20070135386A1-20070614-C00210
  • 3-(2-Difluoromethoxy-phenylmethanesulfonyl)-2-[(morpholine-4-carbonyl)-amino]-propionic acid (100 mg, 0.237 mmol), 2-aminocyclohexanol (58 mg, 0.5 mmol), EDC (100 mg, 0.52 mmol), and HOBt (100 mg, 0.64 mmol) were combined. Dichloromethane (2 mL) was added and then 4-methylmorpholine (0.2 mL). The mixture was stirred at ambient temperature for 2 h. After dilution with ethyl acetate (100 mL) the solution was washed with 1N aqu. HCl (30 mL), sat. aqu. NaHCO3 (30 mL) and brine (30 mL), dried with MgSO4 and evaporated under vacuum. The crude product was dissolved in dichloromethane (10 mL). Dess-Martin periodinane (300 mg, 0.71 mmol) was added, and the reaction mixture was stirred at ambient temperature for 1 h. After dilution with ethyl acetate (100 mL), the solution was washed with 0.26M Na2S2O3 in sat. aqu. NaHCO3 (30 mL), sat. aqu. NaHCO3 and brine, dried with MgSO4, and evaporated under vacuum. Purification by flash-chromatography on silica gel (ethyl acetate/hexane) gave morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phenylmethanesulfonyl)-1-(2-oxo-cyclohexylcarbamoyl)-ethyl]-amide (78 mg, 0.151 mmol) as a white solid. Mixture of diastereomers: 1H NMR: (DMSO) [8.03 (d, J=7.2 Hz), 7.96 (d, J=7.2 Hz), 1H], 7.50-7.42 (m, 2H), 7.30-7.21 (m, 2H), 7.10 (t, JH,F=74 Hz, 1H), 7.03 (d, J=8.4 Hz, 1H), 4.78-4.69 (m, 1H), 4.54 (s, 2H), 4.41-4.33 (m, 1H), 3.62-3.25 (m, 10H), 2.55-1.40 (m, 8H). MS: (M+H)+ 518.
  • By proceeding in similar manner to Example 9 but using 2-aminocyclopentanol there was prepared morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phenylmethanesulfonyl)-1-(2-oxo-cyclopentylcarbamoyl)-ethyl]-amide (Compound 12) as a mixture of diastereomers: 1H NMR: (DMSO) [8.19 (d, J=8 Hz), 7.15 (d, J=8 Hz), 1H], 7.49-7.42 (m, 2H), 7.30-7.21 (m, 2H), 7.10 (t, JH,F=74 Hz, 1H), [7.02 (d, J=8.4 Hz), 7.00 (d, J=8.4 Hz), 1H], 4.77-4.70 (m, 1H), [4.53 (s), 4.52 (s), 2H], 4.10-3.91 (m, 1H), 3.60-3.23 (m, 10H), 2.28-1.70 (m, 6H). MS: (M+H)+ 504.
  • By proceeding in similar manner to Example 9 but using 2-aminocyclobutanol there was prepared morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phenylmethanesulfonyl)-1-(2-oxo-cyclobutylcarbamoyl)-ethyl]-amide (Compound 13) as a mixture of diastereomers: 1H NMR: (DMSO) 8.49 (d, J=7.6 Hz, 1H), 7.48-7.42 (m, 2H), 7.30-7.21 (m, 2H), 7.11 (t, JH,F=74 Hz, 1H), 7.02 (d, J=8.8 Hz, 1H), 4.88-4.67 (m, 2H), 4.53 (s, 2H), 3.64-3.23 (m, 10H), 2.93-2.70 (m, 2H), 2.23-1.99 (m, 2H). MS: (M+H)+
    • Example 10 Morpholine-4-carboxylic acid [1-(2-benzylcarbamoyl-2-oxo-ethylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide Compound 14
  • Figure US20070135386A1-20070614-C00211
  • Isoserine (3.11 g, 29.6 mmol) was dissolved in 1,4-dioxane/H2O 3:1 (40 mL). K2CO3 (0.5 g) and NaHCO3 (0.5 g) was added. Di-tert-butyl dicarbonate (6.45 g, 29.6 mmol) was added and the mixture was stirred at ambient temperature over night. The reaction mixture was extracted with dichloromethane (3×100 mL). The combined organic phases were washed with brine, dried with MgSO4, and evaporated under vacuum. The crude 3-tert-butoxycarbonylamino-2-hydroxy-propionic acid (4.76 g, 23.2 mmol) was obtained as a colorless oil, which solidified on standing, and was used without further purification.
  • 3-tert-butoxycarbonylamino-2-hydroxy-propionic acid (1.5 g, 7.31 mmol), benzylamine (1.1 mL, 100 mmol), EDC (2.5 g, 13.1 mmol), and HOBt (2.0 g, 12.8 mmol) were combined. Dichloromethane (15 mL) was added and then 4-methylmorpholine (2 mL). The mixture was stirred at ambient temperature for 2 h. After dilution with ethyl acetate (300 mL) the solution was washed with 1N aqu. HCl (100 mL), sat. aqu. NaHCO3 (100 mL) and brine (100 mL), dried with MgSO4 and evaporated under vacuum. Yield: 1.83 g, 6.22 mmol (2-Benzylcarbamoyl-2-hydroxy-ethyl)-carbamic acid tert-butyl ester.
  • (2-Benzylcarbamoyl-2-hydroxy-ethyl)-carbamic acid tert-butyl ester (0.2 g, 0.68 mmol) was dissolved in dichloromethane (2 mL) and trifluoroacetic acid (2 mL). After stirring for 2 h at ambient temperature, the solution was evaporated under vacuum and the residue was dried under high vacuum. To this residue were added EDC (200 mg, 1.05 mmol), HOBt (200 mg, 1.28 mmol), 2-[(Morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid (200 mg, 0.56 mmol), dichloromethane (5 mL) and 4-methylmorpholine (0.5 mL). The mixture was stirred at ambient temperature for 2 h. After dilution with ethyl acetate (100 mL) the solution was washed with 1N aqu. HCl (30 mL), sat. aqu. NaHCO3 (30 mL) and brine (30 mL), dried with MgSO4 and evaporated under vacuum. The crude product was dissolved in dichloromethane (10 mL). Dess-Martin periodinane (500 mg, 1.18 mmol) was added, and the reaction mixture was stirred at ambient temperature for 1 h. After dilution with ethyl acetate (100 mL), the solution was washed with 0.26M Na2S2O3 in sat. aqu. NaHCO3 (30 mL), sat. aqu. NaHCO3 and brine, dried with MgSO4, and evaporated under vacuum. The product (morpholine-4-carboxylic acid [1-(2-benzlcarbamoyl-2-oxo-ethylcarbamoy)-2-phenylmethanesulfonyl-ethyl]-amide) was crystallized from ethyl acetate/diethylether and was obtained as a white solid (153 mg, 0.29 mmol). 1H NMR: (DMSO) 9.24 (t, J=6.4 Hz, 1H), 8.19 (t, J=5.6 Hz, 1H), 7.39-7.19 (m, 10H), 7.08 (d, J=8 Hz, 1H), 4.83-4.76 (m, 1H), 4.49 (s, 2H), 4.48-4.33 (m, 2H), 4.31 (d, J=6.8 Hz, 2H), 3.68-3.25 (m, 10H). MS: (M+H)+ 531.
    • Example 11 Acetic acid 3-{2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionylamino}-4-oxo-azetidin-2-yl ester Compound 15
  • Figure US20070135386A1-20070614-C00212
  • Acetic acid 3-benzyloxycarbonylamino-4-oxo-azetidin-2-yl ester was prepared as outlined in J. C. Arnould et al. Eur. J. Med. Chem 1992, 27, 131-140.
  • Acetic acid 3-benzyloxycarbonylamino-4-oxo-azetidin-2-yl ester (100 mg, 0.36 mmol) was hydrogenated on a Parr shaker over 10% palladium on carbon (100 mg) in ethyl acetate (20 mL) at 50 psi for 5 h. The mixture was filtered through Celite and evaporated. Acetic acid 3-amino-4-oxo-azetidin-2-yl ester was obtained in quantitative yield.
  • 2-[(Morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid (100 mg, 0.28 mmol), acetic acid 3-amino-4-oxo-azetidin-2-yl ester (52 mg, 0.36 mmol), EDC (100 mg, 0.52 mmol), and HOBt (100 mg, 0.64 mmol) were combined. Dichloromethane (2 mL) was added and then 4-methylmorpholine (0.2 mL). The mixture was stirred at ambient temperature for 2 h. After dilution with ethyl acetate (100 mL) the solution was washed with 1N aqu. HCl (30 mL), sat. aqu. NaHCO3 (30 mL) and brine (30 mL), dried with MgSO4 and evaporated under vacuum. The residue was subjected to flash chromatography on silica gel (ethyl acetate) to give acetic acid 3-{2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionylamino}-4-oxo-azetidin-2-yl ester (17 mg, 0.035 mmol). 1H NMR: (DMSO) 9.18 (s, 1H), 8.72 (d, J=6.4 Hz, 1H), 7.41-7.30 (m, 5H), 7.08 (m, 1H), 5.76 (s, 1H), 4.80-4.61 (m, 2H), 4.49 (s, 2H), 3.63-3.22 (m, 10H), 2.08 (s, 3H). MS: (M+H)+ 483.
    • Example 12 Morpholine-4-carboxylic acid [1-(4-oxo-tetrahydro-furan-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide Compound 16
  • Figure US20070135386A1-20070614-C00213
  • 4-Amino-tetrahydro-furan-3-ol was prepared as outlined in Marquis, Robert W. et al. J. Med. Chem 2001. 44, 725-736.
  • 2-[(Morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid (100 mg, 0.28 mmol), 4-aminotetrahydrofuran-3-ol (100 mg, 0.96 mmol), EDC (200 mg, 1.04 mmol), and HOBt (200 mg, 1.28 mmol) were combined. DMF (2 mL) was added and then 4-methylmorpholine (0.2 mL). The mixture was stirred at ambient temperature for 2 h. After dilution with ethyl acetate (100 mL) the solution was washed with 1N aqu. HCl (30 mL), sat. aqu. NaHCO3 (30 mL) and brine (30 mL), dried with MgSO4 and evaporated under vacuum. The crude product was dissolved in dichloromethane (10 mL). Dess-Martin periodinane (300 mg, 0.71 mmol) was added, and the reaction mixture was stirred at ambient temperature for 1 h. After dilution with ethyl acetate (100 mL), the solution was washed with 0.26M Na2S2O3 in sat. aqu. NaHCO3 (30 mL), sat. aqu. NaHCO3 and brine, dried with MgSO4, and evaporated under vacuum. Purification by flash-chromatography on silica gel (ethyl acetate) gave mornholine-4-carboxylic acid [1-(4-oxo-tetrahydro-furan-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide (8.6 mg, 0.020 mmol) as a colorless glass. Mixture of diastereomers: 1H NMR: (DMSO) [8.42 (d, J=6.8 Hz), 7.15 (d, J=7.2 Hz), 1H], 7.40-7.32 (m, 5H), [7.06 (d, J=8 Hz), 7.05 (d, J=8 Hz), 1H], 4.78-4.68 (m, 1H), [4.49 (s), 4.48 (s), 2H], 4.32-3.75 (m, 5H), 3.60-3.23 (m, 10H). MS: (M+H)+ 440.
    • Example 13 Morpholine-4-carboxylic acid [1-(2-hydroxy-1,1-dimethyl-3-oxo-3-phenyl-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide Compound 17
  • Figure US20070135386A1-20070614-C00214
    Step 1 To a flask fitted with a septum and stirbar under a nitrogen atmosphere containing 4.1 g (20 mmol) of 2-phenyl-1,3-dithiane (Aldrich) was added dry distilled THF (20 mL). The solution was cooled to −30° C. and n-butyl lithium (1.6M in pentane, 16.8 mmol, 10.5 mL) was added slowly by syringe. The reaction mixture was warmed to −20° C. and held at that temperature for 30 minutes, and then held at −10° C. for 15 minutes. The yellow solution was cooled to −78° C. and (1,1-dimethyl-2-oxo-ethyl)-carbamic acid tert-butyl ester (1.5 g, 8 mmol, in 5 ml THF) was added rapidly (over 30 seconds) and 60 seconds later a solution of 2 mL acetic acid and 5 mL THF was added rapidly. The cooling bath was removed and 4 minutes later water was added and the mixture was extracted with ethyl acetate. The solvent was removed under reduced pressure and then recrystallized from 10 ml of ethyl acetate. The white crystals were washed three times with ethyl acetate and dried under reduced pressure to afford [2-hydroxy-1,1-dimethyl-2-(2-phenyl-[1,3]dithian-2-yl)-ethyl]-carbamic acid tert-butyl ester (1.6 g, 52%).
    Step 2 To [2-hydroxy-1,1-dimethyl-2-(2-phenyl-[1,3]dithian-2-yl)-ethyl]-carbamic acid tert-butyl ester (1 g, 2.6 mmol) in 4.8 mL dioxane at 10° C. was added hydrochloric acid (4.8 mL, 4M in dioxane). The solution was warmed to 23° C. After 2 hours the solution was concentrated to 4 ml and diluted with ether to afford a white precipitate that was collected by filtration. The mother liquor was concentrated to a paste and triturated with ether. The solids were combined to afford 726 mg of 2-amino-2-methyl-1-(2-phenyl-[1,3]dithian-2-yl)-propan-1-ol (98% yield).
    Step 3 2-Amino-2-methyl-1-(2-phenyl-[1,3]dithian-2-yl)-propan-1-ol and 2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionic acid were coupled using the standard peptide coupling conditions hereinbefore described to afford morpholine-4-carboxylic acid {1-[2-hydroxy-1,1-dimethyl-2-(2-phenyl-[1,3]dithian-2-yl)-ethylcarbamoyl]-2-phenylmethanesulfonyl-ethyl}-amide (270 mg, 78%).
    Step 4 To morpholine-4-carboxylic acid {1-[2-hydroxy-1,1-dimethyl-2-(2-phenyl-[1,3]dithian-2-yl)-ethylcarbamoyl]-2-phenylmethanesulfonyl-ethyl}-amide (200 mg, 0.32 mmol) in 5.25 ml of 4:1 acetonitrile:water at 23° C. was simultaneously added finely ground HgCl2 (192 mg, 0.7 mmol) and finely ground calcium carbonate (80 mg, 0.8 mmol) with stirring. The mixture was stirred for 10 minutes and then diluted with ethyl acetate. Methylene chloride was added and the organics were washed with water. After separation the organic layer concentrated to a gum that solidified upon addition of ether. The ether was removed under reduced pressure to afford a white solid. The solid was dissolved in a minimum of hot methylene chloride and filtered to remove insoluble material. The solution was concentrated to afford morpholine-4-carboxylic acid [1-(2-hydroxy-1,1-dimethyl-3-oxo-3-phenyl-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide (165 mg, 100% yield).
    Step 5 [1-(2-hydroxy-1,1-dimethyl-3-oxo-3-phenyl-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide was oxidized in the usual manner to afford morpholine-4-carboxylic acid [1-(2-hydroxy-1,1-dimethyl-3-oxo-3-phenyl-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide. 1HNMR: (CDCl3) [8.0 (d, J=8 Hz) 1H], 7.7-7.2 (m, 10H), [5.9 (d, J=6 Hz) 1H], [4.8 (d, J=6 Hz) 1H], [4.3 (d, J=14, Hz) 1H], [4.1 (d, J=14 Hz) 1H], 3.7 (m, 4H), 3.36 (m, 4H), [3.3 (d, J=2 Hz) 1H], [3.29 (d, J=2 Hz) 1H], 1.7(s, 6H). LCMS: elution time=3.71 min. 527.6(M−1), 529.6(M+1). (MS: API 150EX. LC: HP Agilent 1100 Series. Column: Phenomenex, 5 u ODS3 100A 100×3 mm.; Flow Rate: 2 ml/min. Two solvent gradient: Solvent A, 99% water, 1% acetonitrile, 0.1% AcOH. Solvent B, 99% actonitrile, 1% water, 0.1% AcOH. Gradient from 100% A, 0% B to 0% A, 100% B from t=0 to t=6 min. Then gradient back to 100% A, 0% B from t=7 to t=15 min.).
  • By proceeding in a similar manner to Example 13 but using 3-(2-difluoromethoxy-phenylmethanesulfonyl)-2-[(morpholine-4-carbonyl)-amino]-propionic acid in step 3 there was prepared morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phenylmethanesulfonyl)-1-(1,1-dimethyl-2,3-dioxo-3-phenyl-propylcarbamoyl)-ethyl]-amide. LC-MS: elution time=3.95 min. 593.4(M−1), 596.2(M+1). (MS: API 150EX. LC: HP Agilent 1100 Series. Column: Phenomenex, 5 u ODS3 100A 100×3 mm.; Flow Rate: 2 ml/min. Two solvent gradient: Solvent A, 99% water, 1% acetonitrile, 0.1% AcOH. Solvent B, 99% actonitrile, 1% water, 0.1% AcOH. Gradient from 100% A, 0% B to 0% A, 100% B from t=0 to t=6 min. Then gradient back to 100% A, 0% B from t=7 to t=15 min.)
    • Example 14 Cathepsin S Assay
  • Solutions of test compounds in varying concentrations were prepared in 10 μL of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 μL, comprising: MES, 50 mM (pH 6.5); EDTA, 2.5 mM; and NaCl, 100 mM). Human cathepsin S (0.158 pMoles in 25 μL of assay buffer) was added to the dilutions. The assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature. Z-Val-Val-Arg-AMC (9 nMoles in 25 μL of assay buffer) was added to the assay solutions and hydrolysis was followed spectrophotometrically at (λ 460 nm) for 5 minutes. Apparent inhibition constants (Ki) were calculated from the enzyme progress curves using standard mathematical models.
    • Example 15 Cathepsin B Assay
  • Solutions of test compounds in varying concentrations were prepared in 10 μL of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 μL, comprising: N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid (BES), 50 mM (pH 6); polyoxyethylenesorbitan monolaurate, 0.05%; and dithiothreitol (DTT), 2.5 mM). Human cathepsin B (0.025 pMoles in 25 μL of assay buffer) was added to the dilutions. The assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature. Z-FR-AMC (20 nMoles in 25 μL of assay buffer) was added to the assay solutions and hydrolysis was followed spectrophotometrically at (λ 460 nm) for 5 minutes. Apparent inhibition constants (Ki) were calculated from the enzyme progress curves using standard mathematical models.
    • Example 16 Cathepsin K Assay
  • Solutions of test compounds in varying concentrations were prepared in 10 μL of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 μL, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM). Human cathepsin K (0.0906 pMoles in 25 μL of assay buffer) was added to the dilutions. The assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature. Z-Phe-Arg-AMC (4 nMoles in 25 μL of assay buffer) was added to the assay solutions and hydrolysis was followed spectrophotometrically at (λ 460 nm) for 5 minutes. Apparent inhibition constants (Ki) were calculated from the enzyme progress curves using standard mathematical models.
    • Example 17 Cathepsin L Assay
  • Solutions of test compounds in varying concentrations were prepared in 10 μL of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 μL, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM). Human cathepsin L (0.05 pMoles in 25 μL of assay buffer) was added to the dilutions. The assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature. Z-Phe-Arg-AMC (1 nMoles in 25 μL of assay buffer) was added to the assay solutions and hydrolysis was followed spectrophotometrically at (λ 460 nm) for 5 minutes. Apparent inhibition constants (Ki) were calculated from the enzyme progress curves using standard mathematical models.
  • Some of the compounds of the invention tested according to the above-described assays for protease inhibition were observed to exhibit selective cathepsin S inhibitory activity. The apparent inhibition constants (Ki) for compounds of the invention, against Cathepsin S, were in the range from about 10−10M to about 10−7M.
    • Example 18
  • Representative Pharmaceutical Formulations Containing a Compound of Formula I
    • Oral Formulation
  • Compound of Formula I 10-100 mg
    Citric Acid Monohydrate 105 mg
    Sodium Hydroxide 18 mg
    Flavoring
    Water q.s. to 100 mL
    • Intravenous Formulation
  • Compound of Formula I 0.1-10 mg
    Dextrose Monohydrate q.s. to make isotonic
    Citric Acid Monohydrate 1.05 mg
    Sodium Hydroxide 0.18 mg
    Water for Injection q.s. to 1.0 mL
    • Tablet Formulation
  • Compound of Formula I  1%
    Microcrystalline Cellulose 73%
    Stearic Acid 25%
    Colloidal Silica  1%.

Claims (15)

1. A compound of Formula I:
Figure US20070135386A1-20070614-C00215
in which:
X1 and X2 are both methylene or X1 is ethylene and X2 is a bond;
R3 is —CR5═CHR6, —CR5(CR6 3)2 or —CR7═NR8, wherein R5 is hydrogen and R6 is hydrogen or (C1-4)alkyl or R5 and R6 together with the atoms to which R5 and R6 are attached form (C3-12)cycloalkenyl, hetero(C5-12)cycloalkenyl, (C6-12)aryl, hetero(C6-12)aryl, (C9-12)bicycloaryl or hetero(C8-12)bicycloaryl and R7 and R8 together with the atoms to which R7 and R8 are attached form hetero(C5-12)cycloalkenyl, hetero(C6-12)aryl or hetero(C8-12)bicycloaryl, wherein R3 optionally is substituted by 1 to 5 radicals independently selected from a group consisting of (C1-4)alkyl, cyano, halo, halo-substituted (C1-4)alkyl, nitro, —X4NR9R9, —X4OR9, —X4SR9, —X4C(O)NR9R9, —X4C(O)OR9, —X4S(O)R10, —X4S(O)2R10 and —X4C(O)R10, wherein X4 is a bond or (C1-2)alkylene, R9 at each occurrence independently is hydrogen, (C1-3)alkyl or halo-substituted (C1-3)alkyl and R10 is (C1-3)alkyl or halo-substituted (C1-3)alkyl; and
R4 is —C(O)X5R11 or —S(O)2X5R11, wherein X5 is a bond, —O— or —NR12—, wherein R12 is hydrogen or (C1-6)alkyl, and R11 is (i) (C1-6)alkyl optionally substituted by —OR13, —SR13, —S(O)R13, —S(O)2R13, —C(O)R13, —C(O)OR13, —C(O)NR13R14, —NR13R14, —NR14C(O)R13, —NR14C(O)OR13, —NR14C(O)NR13R14 or —NR14C(NR14)NR13R14, wherein R13 is (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl and R14 at each occurrence independently is hydrogen or (C1-6)alkyl, or (ii) (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl or (iii) (C3-6)cycloalkyl(C0-3)alkyl, hetero(C5-6)cycloalkyl(C0-3)alkyl, phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl substituted by —X6OR15, —X6SR15, —X6S(O)R15, —X6S(O)2R15, —X6C(O)R15, —X6C(O)OR15, —X6C(O)NR15R16, —X6NR15R16, —X6NR16C(O)R15, —X6NR16C(O)OR15, —X6NR16C(O)NR15R16, —X6NR16C(O)OR16, —X6NR16C(NR16)NR15R16, wherein X6 is a bond or methylene, R15 is (C3-6)cycloalkyl(C0-3)alkyl, hetero(C5-6)cycloalkyl(C0-3)alkyl, phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl and R16 is hydrogen or (C1-6)alkyl; wherein R4 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, (C1-6)alkylidene, cyano, halo, nitro, halo-substituted (C1-3)alkyl, —X6NR17R17, —X6NR17C(O)OR17, —X6NR17C(O)NR17R17, —X6NR17C(NR17)NR17R17, —X6OR17, —X6SR17, —6C(O)OR17, —X6C(O)NR17R17, —X6S(O)2NR17R17, —X6P(O)(OR18)OR17, —X6OP(O)(OR18)OR17, —X6NR17C(O)R18, —X6S(O)R18, —X6S(O)2R18 and —X6C(O)R18 and when occurring within an aliphatic moiety are radicals independently selected from a group consisting of cyano, halo, nitro, —NR17R17, —NR17C(O)OR17, —NRC17C(O)NR17R17, —NR17C(NR17)NR17R17, —OR17, —SR17, —C(O)OR17, —C(O)NR17R17, —S(O)2NR17R17, —P(O)(OR17)OR17, —OP(O)(OR17)OR17, —NR17C(O)R18, —S(O)R18, —S(O)2R18 and —C(O)R18, wherein X6 is a bond or (C1-6)alkylene, R17 at each occurrence independently is hydrogen, (C1-6)alkyl or halo-substituted (C1-3)alkyl and R18 is (C1-6)alkyl or halo-substituted (C1-3)alkyl;
X3 is a group of Formula (b) or (c):
Figure US20070135386A1-20070614-C00216
n is 0, 1 or 2;
R20 is selected from the group consisting of hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl and hetero(C5-12)aryl(C0-6)alcyl;
R23 is selected from (C1-6)alkyl, (C4-6)alkenyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl or hetero(C5-12)aryl(C0-6)alkyl optionally substituted with amino, —NHC(O)R15 or —R15 wherein R15 is as described above;
R25 is selected from hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-13)aryl(C0-6)alkyl, —X4NHR15, —X4S(O)2R26 or —X4C(O)R17NR17C(O)R17 wherein R15, R17 and X4 are as described above;
R26 is selected from the group consisting of hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-12)aryl(C0-6)allyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)-bicycloaryl(C0-3)alkyl;
R27 is hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl or hetero(C5-12)aryl(C0-6)alkyl;
wherein X3 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, (C1-6)alkylidene, cyano, halo, nitro, halo-substituted (C1-3)alkyl, —X6NR17R17, —X6NR17C(O)OR17, —X6NR17C(O)NR17R17, —X6NR17C(NR17)NR17R17, —X6OR17, —X6C(O)R17, —X6OR15, —X6SR17, —X6C(O)OR17, —X6C(O)NR17R17, —X6S(O)2NR17R17, —X6P(O)(OR8)OR17, —X6OP(O)(OR8)OR17, —X6NR17C(O)R18, —X6S(O)R18, —X6S(O)2R18 and —X6C(O)R18 and when occurring within an aliphatic moiety are radicals independently selected from a group consisting of cyano, halo, nitro, —NR17R17, —NR17C(O)OR17, —NR17C(O)NR17R17, —NR17C(NR17)NR17R17, —OR17, —SR17, —C(O)OR17, —C(O)NR17R17, —S(O)2NR17R17, —P(O)(OR17)OR17, —OP(O)(OR17)OR17, —NR17C(O)R18, —S(O)R18, —S(O)2R18 and —C(O)R18, wherein R15, R17, R18 and X6 are as described above; and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof; and the pharmaceutically acceptable salts and solvates of such compounds and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof.
2. The compound of claim 1 in which X1 and X2 are both methylene or X1 is ethylene and X2 is a bond; R3 is —CR5═CHR6, —CR5(CR6 3)2 or —CR7═NR8, wherein R5 is hydrogen and R6 is hydrogen or (C1-4)alkyl or R5 and R6 together with the atoms to which R5 and R6 are attached form (C3-12)cycloalkenyl, (C6-12)aryl, hetero(C6-12)aryl or (C9-12)bicycloaryl and R7 and R8 together with the atoms to which R7 and R8 are attached form hetero(C5-12)cycloalkenyl or hetero(C6-12)aryl, wherein R3 optionally is substituted by 1 to 5 radicals independently selected from a group consisting of (C1-4)alkyl, cyano, halo, halo-substituted (C1-4)alkyl, —X4R9 and —X4C(O)OR9, wherein X4 is a bond or (C1-2)alkylene, R9 at each occurrence independently is (C1-3)alkyl or halo-substituted (C1-3)alkyl; and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof, and the pharmaceutically acceptable salts and solvates of such compounds and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof.
3. The compound of claim 2 in which R4 is —C(O)X5R11 or —S(O)2X5R11, wherein X5 is a bond, —O— or —NR12—, wherein R12 is hydrogen or (C1-6)alkyl, and R11 is (i) (C1-6)alkyl or (ii) hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl or (iii) hetero(C5-6)cycloalkyl(C0-3)alkyl or phenyl(C0-3)alkyl substituted by —X6OR15, —X6C(O)R15 or —X6NR16C(O)OR16, wherein X6 is a bond or methylene, R15 is phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl and R16 is hydrogen or (C1-6)alkyl; wherein R4 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, halo, —X6NR17R17, —X6OR17, —X6C(O)OR17, —X6NC(O)R16 and —X6C(O)R18, R17 at each occurrence independently is hydrogen, (C1-6)alkyl or halo-substituted (C1-3)alkyl and R18 is (C1-6)alkyl or halo-substituted (C1-3)alkyl; and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof; and the pharmaceutically acceptable salts and solvates of such compounds and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof.
4. The compound of claim 3 in which X3 is a group of Formula (b) or (c):
Figure US20070135386A1-20070614-C00217
n is 0, 1 or 2;
R20 is selected from the group consisting of hydrogen and (C1-6)alkyl;
R23 is selected from (C1-6)alkyl optionally substituted with amino, —NHC(O)R15 or —R15 wherein R15 is as described above;
R25 is selected from (C1-6)alkyl, (C6-12)aryl(C0-6)alkyl, —X4S(O)2R26 or —X4C(O)R17NR17C(O)R17 wherein R17 and X4 are as described above and R26 is as described below;
R26 is selected from the group consisting of (C1-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-12)aryl(C0-6)alkyl and (C9-12)bicycloaryl(C0-3)alkyl;
R27 is (C1-6)alkyl;
wherein X3 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, cyano, halo, —X6OR17, —X6C(O)R17 and —X6OR15; and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof; and the pharmaceutically acceptable salts and solvates of such compounds and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof.
5. The compound of claim 4 in which R3 is selected from the group consisting of phenyl, pyridin-2-yl, pyridin-3-yl, pyridin-4-yl, vinyl, 2-difluoromethoxyphenyl, 1-oxy-pyridin-2-yl, 4-methoxyphenyl, 4-methylphenyl, 2-methylphenyl, 4-chlorophenyl, 3,5-dimethylphenyl, 4-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 2-bromophenyl, naphthalen-2-yl, 3,4-dichlorophenyl, 3-methylphenyl, 3-trifluoromethylphenyl, 3-trifluoromethoxyphenyl, 2,3,4,5,6-pentafluoro-phenyl, 2-fluorophenyl, 2-chlorophenyl, 2-cyano-phenyl, 2-trifluoromethylphenyl, 4-tert-butyl-phenyl, 3-chlorophenyl, 4-bromophenyl, 2-fluoro-3-chloro-phenyl, 2-fluoro-3-methyl-phenyl, 3-fluorophenyl, 2,5-difluorophenyl, 3-bromophenyl, 2,5-dichlorophenyl, 2,6-difluorophenyl, 3-cyano-phenyl, 4-cyano-phenyl, 2-trifluoromethoxyphenyl, 2,3-difluorophenyl, biphenyl, 2-bromo-5-fluoro-phenyl, 4-fluorophenyl, 3,4-difluorophenyl, 2,4-difluorophenyl, 2,4,6-trifluorophenyl, 2,4,5-trifluorophenyl, 2,3,4-trifluorophenyl, 2-chloro-5-trifluoromethylphenyl, 2,4-bis-trifluoromethylphenyl, 2,5,6-trifluorophenyl, 2-fluoro-3-trifluoromethylphenyl, 2-fluoro-4-trifluoromethylphenyl, 2-fluoro-5-trifluoromethylphenyl, 2,3,5-trifluorophenyl, 2-fluoro-5-trifluoromethylphenyl, 5-fluoro-2-trifluoromethylphenyl, 4-fluoro-3-trifluoromethylphenyl, 2-methoxyphenyl, 3,5-bis-trifluoromethylphenyl, 4-difluoromethoxyphenyl, 3-difluoromethoxyphenyl, 2,6-dichlorophenyl, 4-carboxyphenyl, cyclohexyl, cyclopropyl, isopropyl, thiophen-2-yl, 5-chloro-thiophen-2-yl and 3,5-dimethyl-isoxazol-4-yl.
6. The compound of claim 5 in which R4 is benzoyl, morpholine-4-carbonyl, acetyl, furan-3-carbonyl, 2-methoxy-benzoyl, 3-methoxy-benzoyl, naphthalene-2-carbonyl, benzo[1,3]dioxole-5-carbonyl, 3-pyridin-3-yl-acryloyl, benzofuran-2-carbonyl, furan-2-carbonyl, tert-butoxy-carbonyl, biphenyl-4-carbonyl, quinoline-2-carbonyl, quinoline-3-carbonyl, 3-acetyl-benzoyl, 4-phenoxy-benzoyl, 3-hydroxy-benzoyl, 4-hydroxy-benzoyl, pyridine-3-carbonyl, 3-(tert-butoxycarbonylamino-methyl)-benzoyl, 4-carbonyl-piperazine-1-carboxylic acid tert-butyl ester, 4-carbonyl-piperazine-1-carboxylic acid ethyl ester, 4-(furan-2-carbonyl)-piperazine-1-carbonyl, pyridine-4-carbonyl, 1-oxy-pyridine-4-carbonyl, 1-oxy-pyridine-3-carbonyl, thiophene-2-carbonyl, thiophene-3-carbonyl, 4-benzoyl-benzoyl, 5-methyl-thiophene-2-carbonyl, 3-chloro-thiophene-2-carbonyl, 3-bromo-thiophene-2-carbonyl, 4-chloro-benzoyl, 3-flouro-4-methoxy-benzoyl, 4-methoxy-benzoyl, 4-triflouromethoxy-benzoyl, 3,4-diflouro-benzoyl, 4-fluoro-benzoyl, 3,4-dimethoxy-benzoyl, 3-methyl-benzoyl, 4-bromo-benzoyl, 4-triflouromethyl-benzoyl, 3-benzoyl-benzoyl, cyclopentane-carbonyl, benzo[b]thiophene-2-carbonyl, 3-chloro-benzo[b]thiophene-2-carbonyl, benzenesulfonyl, naphthalene-2-sulfonyl, 5-methyl-thiophene-2-sulfonyl, thiophene-2-sulfonyl, formamyl-methyl ester, 4-methyl-pentanoyl, formamyl-isobutyl ester, formamyl-monoallyl ester, formamyl-isopropyl ester, N,N-dimethyl-formamyl, N-isopropyl-formamyl, N-pyridin-4-yl-formamyl, N-pyridin-3-yl-formamyl, 3-phenyl-acryloyl, 1H-indole-5-carbonyl, pyridine-2-carbonyl, pyrazine-2-carbonyl, 3-hydroxy-pyridine-2-carbonyl, 2-amino-pyridine-3-carbonyl, 2-hydroxy-pyridine-3-carbonyl, 6-amino-pyridine-3-carbonyl, 6-hydroxy-pyridine-3-carbonyl, pyridazine-4-carbonyl, 3-phenoxy-benzoyl and 1-oxo-1,3-dihydro-isoindole-2-carbonyl.
7. The compound of claim 6 in which X3 is selected from a group consisting of 1-ethyl-2-oxo-3-(toluene-4-sulfonylamino)-butylamino, 1-ethyl-2-oxo-3-(4-phenoxy-benzenesulfonylamino)-propylamino, 1-ethyl-2-oxo-3-[4-(pyridin-3-yloxy)-benzenesulfonylamino]-propylamino, 3-(dibenzofuran-2-sulfonylamino)-1-ethyl-2-oxo-butylamino, 1-ethyl-3-[4-methyl-2-(4-methyl-pentanoylamino)-pentanoylamino]-2-oxo-propylamino, 5-amino-1-[(4-methoxy-phenylsulfamoyl)-methyl]-pentylamino, 5-benzyloxycarbonylamino-1-[(4-methoxy-phenylsulfamoyl)-methyl]-pentylamino, 1-[(4-methoxy-phenylsulfamoyl)-methyl]-3-phenyl-propylamino, 1-{[4-(1-hydroxy-ethyl)-phenylsulfamoyl]-methyl}-3-phenyl-propylamino, 1-[(4-acetyl-phenylsulfamoyl)-methyl]-3-phenyl-propylamino, 1-[(4-hydroxy-phenylsulfamoyl)-methyl]-3-phenyl-propylamino and 3-phenyl-1-[(2-phenylamino-ethylsulfamoyl)-methyl]-propylamino.
8. The compound of claim 7 selected from the group consisting of morpholine-4-carboxylic acid (1-{5-amino-1-[(4-methoxy-phenylsulfamoyl)-methyl]-pentylcarbamoyl}-2-phenylmethanesulfonyl-ethyl)-amide, (6-(4-methoxy-phenylsulfamoyl)-5-{2-[(morpholine-4-carbonyl)-amino]-3-phenylmethane-sulfonyl-propionylamino}-hexyl)-carbamic acid benzyl ester, morpholine-4-carboxylic acid (1-{1-[(4-methoxy-phenylsulfamoyl)-methyl]-3-phenyl-propylcarbamoyl}-2-phenylmethanesulfonyl-ethyl)-amide and morpholine-4-carboxylic acid [1-(3-benzenesulfonylamino-2-oxo-propylcarbamoyl)-2-phenyhethanesulfonyl-ethyl]-amide.
9. A pharmaceutical composition comprising a therapeutically effective amount of a compound of claim 1 in combination with a pharmaceutically acceptable excipient.
10. A method for treating a disease in an animal in which inhibition of Cathepsin S can prevent, inhibit or ameliorate the pathology and/or symptomology of the disease, which method comprises administering to the animal a therapeutically effective amount of compound of claim 1 or a N-oxide derivative or individual isomer or mixture of isomers thereof; or a pharmaceutically acceptable salt or solvate of such compounds and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers thereof.
11. A process for preparing a compound of Formula I:
Figure US20070135386A1-20070614-C00218
in which:
X1 and X2 are both methylene or X1 is ethylene and X2 is a bond;
R3 is —CR5═CHR6, —CR5(CR6 3)2 or —CR7═NR8, wherein R5 is hydrogen and R6 is hydrogen or (C1-4)alkyl or R5 and R6 together with the atoms to which R5 and R6 are attached form (C3-12)cycloalkenyl, hetero(C5-12)cycloalkenyl, (C6-12)aryl, hetero(C6-12)aryl, (C9-12)bicycloaryl or hetero(C8-12)bicycloaryl and R7 and R8 together with the atoms to which R7 and R8 are attached form hetero(C5-12)cycloalkenyl, hetero(C6-12)aryl or hetero(C8-12)bicycloaryl, wherein R3 optionally is substituted by 1 to 5 radicals independently selected from a group consisting of (C1-4)alkyl, cyano, halo, halo-substituted (C1-4)alkyl, nitro, —X4NR9R9, —X4OR9, —X4SR9, —X4C(O)NR9R9, —X4C(O)OR9, —X4S(O)R10, —X4S(O)2R10 and —X4C(O)R10, wherein X4 is a bond or (C1-2)alkylene, R9 at each occurrence independently is hydrogen, (C1-3)alkyl or halo-substituted (C1-3)alkyl and R10 is (C1-3)alkyl or halo-substituted (C1-3)alkyl; and
R4 is —C(O)X5 R11 or —S(O)2X5R11, wherein X5 is a bond, —O— or —NR12—, wherein R12 is hydrogen or (C1-6)alkyl, and R11 is (i) (C1-6)alkyl optionally substituted by —OR17, —SR13, —S(O)R13, —S(O)2R13, —C(O)R13, —C(O)OR13, —C(O)NR13R14, —NR13R14, —NR14C(O)R13, —NR14C(O)OR13, —NR14C(O)NR13R14 or —NR14C(NR14)NR13R14, wherein R13 is (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alklyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl and R14 at each occurrence independently is hydrogen or (C1-6)alkyl, or (ii) (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl or (iii) (C3-6)cycloalkyl(C0-3)alkyl, hetero(C5-6)cycloalkyl(C0-3)alkyl, phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl substituted by —X6OR15, —X6SR15, —X6S(O)R15, —X6S(O)2R15, —X6C(O)R15, —X6C(O)OR15, —X6C(O)NR15R16, —X6NR15R16, —X6NR16C(O)R15, —X6NR16C(O)OR15, —X6NR16C(O)NR15R16, —X6NR16C(O)OR16, —X6NR16C(NR16)NR15R17, wherein X6 is a bond or methylene, R15 is (C3-6)cycloalkyl(C0-3)alkyl, hetero(C5-6)cycloalkyl(C0-3)alkyl, phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl and R16 is hydrogen or (C1-6)alkyl; wherein R4 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, (C1-6)alkylidene, cyano, halo, nitro, halo-substituted (C1-3)alkyl, —X6NR17R17, —X6NR17C(O)OR17, —X6NR17C(O)NR17R17, —X6NR17C(NR17)NR17R17, —X6OR17, —X6SR17, —X6C(O)OR17, —X6C(O)NR17R17, —X6S(O)2NR17R17, —X6P(O)(OR18)OR17, —X6OP(O)(OR18)OR17, —X6NR17C(O)R18, —X6S(O)R18, —X6S(O)2R18 and —X6C(O)R18 and when occurring within an aliphatic moiety are radicals independently selected from a group consisting of cyano, halo, nitro, —NR17R17, —NR17C(O)OR17, —NR17C(O)NR17R17, —NR17C(NR17)NR17R17, —OR17, —SR17, —C(O)OR17, —C(O)NR17R17, —S(O)2NR17R17, —P(O)(OR17)OR17, —OP(O)(OR17)OR17, —NR17C(O)R18, —S(O)R18, —S(O)2R18 and —C(O)R18, wherein X6 is a bond or (C1-6)alkylene, R17 at each occurrence independently is hydrogen, (C1-6)alkyl or halo-substituted (C1-3)alkyl and R18 is (C1-6)alkyl or halo-substituted (C1-3)alkyl;
X3 is a group of Formula (b) or (c):
Figure US20070135386A1-20070614-C00219
n is 0, 1 or 2;
R20 is selected from the group consisting of hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alklyl, (C6-12)aryl(C0-6)alkyl and hetero(C5-12)aryl(C0-6)alkyl;
R23 is selected from (C1-6)alkyl, (C4-6)alkenyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl or hetero(C5-12)aryl(C0-6)alkyl optionally substituted with amino, —NHC(O)R15 or —R15 wherein R15 is as described above;
R25 is selected from hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-13)aryl(C0-6)alkyl, —X4NHR15, —X4S(O)2R26 or —X4C(O)R17NR17C(O)R17 wherein R15, R17 and X4 are as described above;
R26 is selected from the group consisting of hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-12)aryl(C0-6)alkyl, (C9-12)bicycloaryl(C0-3)alkyl and hetero(C8-12)-bicycloaryl(C0-3)alkyl;
R27 is hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl or hetero(C5-12)aryl(C0-6)alkyl;
wherein X3 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, (C1-6)alkylidene, cyano, halo, nitro, halo-substituted (C1-3)alkyl, —X6NR17R17, —X6NR17C(O)OR17, —X6NR17C(O)NR17R17, —X6NR17C(NR17)NR17R17, —X6OR17, —X6C(O)R17, —X6OR15, —X6SR17, —X6C(O)OR17, —X6C(O)NR17R17, —X6S(O)2NR17R17, —X6P(O)(OR8)OR17, —X6OP(O)(OR8)OR17, —X6NR17C(O)R18, —X6S(O)R18, —X6S(O)2R18 and —X6C(O)R18 and when occurring within an aliphatic moiety are radicals independently selected from a group consisting of cyano, halo, nitro, —NR17R17, —NR17C(O)OR17, —NR17C(O)NR17R17, —NR17C(NR17)NR17R17, —OR17, —SR17, —C(O)OR17, —C(O)NR17R17, —S(O)2NR17R17, —P(O)(OR17)OR17, —OP(O)(OR17)OR17, —NR17C(O)R18, —S(O)R18, —S(O)2R18 and —C(O)R18, wherein R15, R17, R18 and X6 are as described above; said process comprising:
(A) reacting a compound of Formula 2 with a compound of the formula (b):
Figure US20070135386A1-20070614-C00220
in which R20, R23 and R25 are the same as defined above for Formula I; or
(B) reacting a compound of Formula 2 with a compound of the formula (c):
Figure US20070135386A1-20070614-C00221
in which R20, R23 and R25 are the same as defined above for Formula I; and
(C) optionally converting a compound of Formula I into a pharmaceutically acceptable salt; or
(D) optionally converting a salt form of a compound of Formula I to non-salt form; or
(E) optionally converting an unoxidized form of a compound of Formula I into a pharmaceutically acceptable N-oxide; or
(F) optionally converting an N-oxide form of a compound of Formula I into an unoxidized form; or
(G) optionally resolving an individual isomer of a compound of Formula I from a mixture of isomers; or
(H) optionally converting a non-derivatized compound of Formula I into a pharmaceutically prodrug derivative; or
(I) optionally converting a prodrug derivative of a compound of Formula 1 to its non-derivatized form.
12. A compound of Formula Ix:
Figure US20070135386A1-20070614-C00222
in which:
X1 and X2 are both methylene or X1 is ethylene and X2 is a bond;
R3 is —CR5═CHR6, —CR5(CR6 3)2 or —CR7═NR8, wherein R5 is hydrogen and R6 is hydrogen or (C1-4)alkyl or R5 and R6 together with the atoms to which R5 and R6 are attached form (C3-12)cycloalkenyl, hetero(C5-12)cycloalkenyl, (C6-12)aryl, hetero(C6-12)aryl, (C9-12)bicycloaryl or hetero(C8-12)bicycloaryl and R7 and R8 together with the atoms to which R7 and R8 are attached form hetero(C5-12)cycloalkenyl, hetero(C6-12)aryl or hetero(C8-12)bicycloaryl, wherein R3 optionally is substituted by 1 to 5 radicals independently selected from a group consisting of (C1-4)alkyl, cyano, halo, halo-substituted (C1-4)alkyl, nitro, —X4NR9R9, —X4OR9, —X4SR9, —X4C(O)NR9R9, —X4C(O)OR9, —X4S(O)R10, —X4S(O)2R10 and —X4C(O)R10, wherein X4 is a bond or (C1-2)alkylene, R9 at each occurrence independently is hydrogen, (C1-3)alkyl or halo-substituted (C1-3)alkyl and R10 is (C1-3)alkyl or halo-substituted (C1-3)alkyl; and
R4 is —C(O)X5R11 or —S(O)2X5R11, wherein X5 is a bond, —O— or —NR12, wherein R12 is hydrogen or (C1-6)alkyl, and R11 is (i) (C1-6)alkyl optionally substituted by —OR13, —SR13, —S(O)R13, —S(O)2R13, —C(O)R13, —C(O)OR13, —C(O)NR13R14, —NR13R14, —NR14C(O)R13, —NR14C(O)OR13, —NR14C(O)NR13R14 or —NR14C(NR14)NR13R14, wherein R13 is (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl and R14 at each occurrence independently is hydrogen or (C1-6)alkyl, or (ii) (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl or (iii) (C3-6)cycloalkyl(C0-3)alkyl, hetero(C5-6)cycloalkyl(C0-3)alkyl, phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl substituted by —X6OR15, —X6SR15, —X6S(O)R15, —X6S(O)2R15, —X6C(O)R15, —X6C(O)OR15, —X6C(O)NR15R16, —X6NR15R16, —X6NR16C(O)R15, —X6NR16C(O)OR15, —X6NR16C(O)NR15R16, —X6NR16C(O)OR16, —X6NR16C(NR16)NR15R16, wherein X6 is a bond or methylene, R15 is (C3-6)cycloalkyl(C0-3)alkyl, hetero(C5-6)cycloalkyl(C0-3)alkyl, phenyl(C0-3)alkyl or hetero(C5-6)aryl(C0-3)alkyl and R16 is hydrogen or (C1-6)alkyl; wherein R4 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, (C1-6)alkylidene, cyano, halo, nitro, halo-substituted (C1-3)alkyl, —X6NR17R17, —X6NR17C(O)OR17, —X6NR17C(O)NR17R17, —X6NR17C(NR17)NR17R17, —X6OR17, —X6SR17, —X6C(O)OR17, —X6C(O)NR17R17, —X6S(O)2NR17R17, —X6P(O)(OR18)OR17, —X6OP(O)(OR18)OR17, —X6NR17C(O)R18, —X6S(O)R18, —X6S(O)2R18 and —X6C(O)R18 and when occurring with aliphatic moiety are radicals independently selected from a group consisting of cyano, halo, nitro, —NR17R17, —NR17C(O)OR17, —NR17C(O)NR17R17, —NR17C(NR17)NR17R17, —OR17, —SR17, —C(O)OR17, —C(O)NR17R17, —S(O)2NR17R17, —P(O)(OR17)OR17, —OP(O)(OR17)OR17, —NR17C(O)R18, —S(O)R18, —S(O)2R18 and —C(O)R18, wherein X6 is a bond or (C1-6)alkylene, R17 at each occurrence independently is hydrogen, (C1-6)alkyl or halo-substituted (C1-3)alkyl and R18 is (C1-6)alkyl or halo-substituted (C1-3)alkyl;
X3 is a group of Formula (b), (c), (d), (e), (f), (g) or (h):
Figure US20070135386A1-20070614-C00223
Figure US20070135386A1-20070614-P00001
represents a single bond, or a double bond;
X7 represents aryl, heteroaryl or NR20R25;
n is 0, 1 or 2;
R20 is selected from the group consisting of hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl and hetero(C5-12)aryl(C0-6)alkyl;
R23 is selected from —H, (C1-6)alkyl, (C4-6)alkenyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl or hetero(C5-12)aryl(C0-6)alkyl optionally substituted with amino, —NHC(O)R15 or —R15 wherein R15 is as described above;
R25 is selected from hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-13)aryl(C0-6)alkyl, —X4NHR15, —X4S(O)2R26 or —X4C(O)R17NR17C(O)R17 wherein R15, R17 and X4 are as described above;
R26 is selected from the group consisting of hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl, hetero(C5-12)aryl(C0-6)alkyl, (C9-12)bicycloaryl(C0-3)alkyl and hetero(C8-12)-bicycloaryl(C0-3)alkyl;
R27 is hydrogen, (C1-6)alkyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl or hetero(C5-12)aryl(C0-6)alkyl;
R28 is R20 or —O—C(═O)—R29;
R29 is (C1-6)alkyl, (C3-12)cycloalkyl(C0-3)alkyl, hetero(C5-12)cycloalkyl(C0-3)alkyl, (C6-12)aryl(C0-3)alkyl, hetero(C5-12)aryl(C0-3)alkyl, (C9-12)bicycloaryl(C0-3)alkyl or hetero(C8-12)bicycloaryl(C0-3)alkyl;
wherein X3 optionally further contains 1 to 5 substituents which when occurring within an alicyclic or aromatic ring system are radicals independently selected from a group consisting of (C1-6)alkyl, (C1-6)alkylidene, cyano, halo, nitro, halo-substituted (C1-3)alkyl, —X6NR17R17, —X6NR17C(O)OR17, —X6NR17C(O)NR17R17, —X6NR17C(NR17)NR17R17, —X6OR17, —X6C(O)R17, —X6OR15, —X6SR17, —X6C(O)OR17, —X6C(O)NR17R17, —X6S(O)2NR17R17, —X6P(O)(OR8)OR17, —X6OP(O)(OR8)OR17, —X6NR17C(O)R18, —X6S(O)R18, —X6S(O)2R18 and —X6C(O)R18 and when occurring within an aliphatic moiety are radicals independently selected from a group consisting of cyano, halo, nitro, —NR17R17, —NR17C(O)OR17, —NR17C(O)NR17R17, —NR17C(NR17)NR17R17, —OR17, —SR17, —C(O)OR17, —C(O)NR17R17, —S(O)2NR17R17, —P(O)(OR17)OR17, —OP(O)(OR17)OR17, —NR17C(O)R18, —S(O)2R18 and —C(O)R18, wherein R15, R17, R18 and X6 are as described above; or one of N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers of compounds of formula Ix; or one of pharmaceutically acceptable salts and solvates of such compounds and the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixtures of isomers formula Ix.
13. A compound of claim 13, wherein R13 is selected from (C1-6)alkyl, (C4-6)alkenyl, (C3-12)cycloalkyl(C0-6)alkyl, hetero(C5-12)cycloalkyl(C0-6)alkyl, (C6-12)aryl(C0-6)alkyl or hetero(C5-12)aryl(C0-6)alkyl optionally substituted with amino, —NHC(O)R15 or —R15 wherein R15 is as described above.
14. A compound of claim 13, selected from the group consisting of:
Morpholine-4-carboxylic acid [1-(3-benzenesulfonylamino-2-oxo-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide; or
N-{1S-[1S-(4-Methoxyphenylsulfamoylmethyl)-3-phenylpropylcarbamoyl]2-benzylsulfonylethyl}-morpholine-4-carboxamide.
15. A compound of claim 13, selected from the group consisting of:
Morpholine-4-carboxylic acid [(R)-1-(6-oxo-cyclohex-1-enylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide;
Morpholine-4-carboxylic acid [(R)-2-cyclopropylmethanesulfonyl-1-(6-oxo-cyclohex-1-enylcarbamoyl)-ethyl]-amide;
Morpholine-4-carboxylic acid [(R)-1-(3,4-dioxo-cyclopentylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide;
Morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phenylmethanesulfonyl)-1-(2-oxo-cyclohexylcarba-moyl)-ethyl]-amide;
Morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phen-ylmethanesulfonyl)-1-(2-oxo-cyclopentylcarbamoyl)-ethyl]-amide;
Morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phenylmethanesulfonyl)-1-(2-oxo-cyclobutylcarbamoyl)-ethyl]-amide;
(Morpholine-4-carboxylic acid[1-(2-benzylcarbamoyl-2-oxo-ethylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide);
Acetic acid 3-{2-[(morpholine-4-carbonyl)-amino]-3-phenylmethanesulfonyl-propionylamino}-4-oxo-azetidin-2-yl ester;
Morpholine-4-carboxylic acid [1-(2-hydroxy-1,1-dimethyl-3-oxo-3-phenyl-propylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide;
Morpholine-4-carboxylic acid [1-(4-oxo-tetrahydro-furan-3-ylcarbamoyl)-2-phenylmethanesulfonyl-ethyl]-amide; or
Morpholine-4-carboxylic acid [2-(2-difluoromethoxy-phenylmethanesulfonyl)-1-(1,1-dimethyl-2,3-diox-o-3-phenyl-propylcarbamoyl)-ethyl]-amide.
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US7196099B2 (en) 2007-03-27
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