TW201605481A - 連接子及其針對adc的應用 - Google Patents
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- TW201605481A TW201605481A TW104122978A TW104122978A TW201605481A TW 201605481 A TW201605481 A TW 201605481A TW 104122978 A TW104122978 A TW 104122978A TW 104122978 A TW104122978 A TW 104122978A TW 201605481 A TW201605481 A TW 201605481A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/32—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against translation products of oncogenes
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Abstract
本發明涉及一類連接細胞毒素藥物與抗體,包含可被常規或新型可被溶酶體酶溶解的二肽結構單元取代的醯胺的連接體。本發明也公開了這類氨基取代的連接體的衍生物ADCs(抗體-藥物偶聯物)在治療癌症中的應用。
Description
本發明涉及一類連接細胞毒素藥物與抗體,包含可被常規或新型可被溶酶體酶溶解的二肽結構單元取代的醯胺的連接體。本發明也公開了這類氨基取代的連接體的衍生物ADCs(抗體-藥物偶聯物)在治療癌症中的應用。
抗體藥物偶聯物(ADC)有希望作為靶向特異性和有效治療一些疾病,例如細菌感染和癌症,同時也能降低藥物的毒副作用。
目標特異性抗體結合細胞毒性化合物的概念是非常簡單而有效。眾所周知,抗體能夠以特定的方式識別抗原,但因為免疫應答的細胞殺傷活性往往不夠充分,從而限制了它的治療潛力。另一方面,細胞毒素化合物被廣泛用於癌症的治療,但相關的非特異性全身不良事件阻礙了這類化合物高劑量的使用從而降低使用效用。因此抗體帶細胞毒素化合物的組合可以增強抗體藥物的療效和降低細胞毒性藥物的毒副作用,歸因於其抗體的靶向特異性遞送以及儘量減少藥物在正常組織暴露。
判斷抗體藥物偶聯物(ADC)成功的一個關鍵因素在於其所依賴的連接橋在血液迴圈中具備一定的穩定性,但到達靶細胞後能迅速裂解以釋放細胞毒性化合物。Adcertris是一個證明成功的連接物的例子,其連接橋中包含可被溶酶體酶切割的肽組分,進入靶細胞後連接橋C-末端的醯胺鍵可以由溶酶體酶容易地切割是必不可少的藥物釋放的機制。
另一方面連接橋上其他醯胺鍵如果經歷過早裂解將導致不希望的副作用(公式B-1)。
本申請描述了用醯胺替代物來替換容易被溶酶體酶裂解肽的N末端的醯胺鍵(公式B-2)。這種修飾可以進一步改善在血液循環體系中的ADC的穩定性。
本發明的目的在於提供式(I)所示連接藥物和抗體的連接體,
其中,R選自CF2H、CF3、CF2CF3、PhSO2Me;Q選自、;
L1選自-(CR1R2)m-(CR3R4)-(CR1R2)n-、-(CR1R2)m-(CR3R4)-O-(CR1R2)n-、-[(CR1R2)(CR1R2)X]p-(CR1R2)q-;m選自1、2、3或4;n選自1、2、3或4;P選自1、2、3、4、5或6;q選自1或2;R1選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;R2選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;R3選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;R4選自H、OH、NR5R6、CO2H、P(O)(OH)2、SO3H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;R5選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;R6選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;X選自NR7、O、S(O)r;r選自0、1或2;R7選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;
L2是一個二肽結構單元,選自;R8選自甲基、丙基、異丙基、
第二丁基、苄基、;R9選自(CH2)4NH2、(CH2)3NHCONH2、(CH2)3NHC
(=NHH)NH2、、、;s選自0、1、2、3或4;
L3為可自分解的結構單元,其選自:、
、、and;
R10選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;各個R11分別獨立地選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;連接在同一個C上的兩個R11可任選地連接在一起形成一個3~6元環;兩個鄰近的R11可任選地連接在一起形成一個5~7元環;R12選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基;R13選自H、或選自任選被1~3個鹵素、OH、NH2、NHMe或NMe2取代的C1-3烷基。
本發明的另一目的在於提供一種式(Ⅱ)所示藥物連接體共軛物,
其中,Q’選自、、;M是一種藥物;其他變數如上述所
定義。
本發明的另一目的在於提供一種式(Ⅲ)所示抗體-藥物偶聯物,
其中,Y是一種抗體;a為選自1~8的整數或小數;M是一種藥物;其他變數如上述所定義。
本發明的一些方案中,a選自1、2、3、3.4、3.5、4、4.2、5、6、7或8。
本發明的一些方案中,上述的抗體選自可優先結合到靶細胞的表面重塑的單克隆抗體、表面重塑的單鍵單克隆抗體、表面重塑的單克隆抗體片段。
本發明的一些方案中,上述抗體選自人源化單克隆抗體、人源化單鏈單克隆抗體、人源化單克隆抗體片段。
本發明的一些方案中,上述抗體選自嵌合抗體、嵌合抗體片段、域抗體或域抗體片段。
本發明的一些方案中,上述抗體選自MY9、anti-B4、EpCAM、CD2、CD3、CD4、CD5、CD6、CD11、CD19、CD20、CD22、CD26、CD30、CD33、CD37、CD38、CD40、CD44、CD56、CD79、CD105、CD138、EphA受體、EphB受體、EGFR、EGFRvIII、HER2、HER3、間皮素、cripto、alphavbeta3、alphavbeta5、alphavbeta6整合蛋白或C242。
本發明的一些方案中,上述抗體選自My9-6、B4、C242、N901、DS6、EphA2受體、CD38、IGF-IR、CNTO95、B-B4、曲妥單抗、Tertuzumab、貝伐珠單抗、西羅珠單抗、利妥昔單抗、阿達木單抗。
本發明的一些方案中,上述抗體選自赫賽汀和愛必妥。
本發明的一些方案中,上述抗體結合的靶細胞選自:腫瘤細胞、病毒感染細胞、微生物感染細胞、寄生蟲感染細胞、自身免疫細胞;或可表達一個或多個IGF-IR、CanAg、EGFR、MUC1、MUC16、VEGF、TF、MY9、anti-B4、EpCAM、CD2、CD3、CD4、CD5、CD6、CD11、CD11a、CD18、CD19、CD20、CD22、CD26、CD30、CD33、CD37、CD38、CD40、CD44、CD56、CD70、CD79、CD105、CD138、EphA受體、EphB受體、EGFRvIII、HER2/neu、HER3、間皮素、cripto、alphavbeta3整合蛋白、alphavbeta5整合蛋白、alphavbeta6整合蛋白、Apo2、或C242抗原的細胞;或可表達胰島素生長因數受體、表皮生長因數受體、葉酸受體的細胞。
本發明的一些方案中,上述腫瘤細胞選自乳腺癌細胞、前列腺癌細胞、卵巢癌細胞、直腸癌細胞、胃癌細胞、鱗狀細胞癌細胞、小細胞肺癌細胞、睾丸癌細胞。
本發明的一些方案中,上述藥物選自細胞毒性藥物。
本發明的一些方案中,上述藥物選自maytansinoid、DNA結合藥物及其類似物、卡裡奇黴素、阿黴素及其類似物、長春花生物鹼、念珠藻素、尾海兔素、阿裡他汀及其類似物、tubulysin、埃博黴素、紫杉烷、siRNA。
本發明的一些方案中,上述DNA結合藥物選自CC-1065。
本發明的一些方案中,上述M選自:
本發明的一些方案中,上述藥物是一種診斷或檢測試劑。
本發明的一些方案中,上述藥物選自放射性標記的化合物。
本發明的一些方案中,上述藥物通過3H、18F、11C、13N、15O、201Tl、32P、51Cr、67Ga、123I、125I、131I、132I、131Cs、113Xe、133Xe、169Yb、198Au、203Hg、99mTc、113mIn、133mIn、75Se、186Re、153Sm、89Sr標記。
本發明的一些方案中,上述L1選自:、
本發明的一些方案中,上述L2選自:、
本發明的一些方案中,上述L2選自:、
本發明的一些方案中,上述連接在同一個C上的兩個R11或相鄰的兩個R11連接在一起所形成的環選自環己基。
本發明的一些方案中,上述L3選自:
本發明的一些方案中,上述結構單元選自
本發明的一些方案中,上述結構單元選自
本發明的一些方案中,上述連接體選自:
本發明的一些方案中,上述連接體選自:
本發明的一些方案中,上述共軛物選自:
本發明的一些方案中,上述共軛物選自:
本發明的一些方案中,上述抗體-藥物偶聯物,其選自:
和;Y是
一個抗體,a是一個選自1~8的整數或小數,具體地,a選自1、2、3、3.4、3.5、4、4.2、5、6、7或8。
本發明的一些方案中,上述抗體-藥物偶聯物選自:
是一個抗體,a是一個選自1~8的整數或小數,具體地,a選自1、2、3、3.4、3.5、4、4.2、5、6、7或8。
本發明的一些方案中,上述抗體-藥物偶聯物選自:
為選自2~6的整數或小數,具體地,a選自2、3、3.4、3.5、4、4.2、5或6。
本發明的一些方案中,上述抗體-藥物偶聯物選自:
為選自2~6的整數或小數,具體地,a選自2、3、3.4、3.5、4、4.2、5或6。
本發明的另一目的在於提供用於合成製備式(Ⅱ)所示藥物連接體共軛物或式(Ⅲ)所示抗體-藥物偶聯物的中間體,包括:
本發明的另一目的在於提供一種藥物組合物,其包上述的治療有效量的抗體-藥物偶聯物或其藥學上可接受的載體、稀釋液或賦形劑。
本發明的另一目的在於提供上述連接體、共軛物、抗體-藥物偶聯物或組合物在製備治療癌症的藥物中的應用。
本發明的另一目的在於提供一種治療或診斷癌症的方法,包括實施使用上述抗體藥物偶聯物上述組合物的有效量。
本案提供名詞定義與說明如下。
C1-6選自C1、C2、C3、C4、C5和C6;C3-6選自C3、C4、C5和C6。
C1-6烷基或雜烷基、C3-6環基或雜環烴基、被C3-6環烴基或雜環烴基取代的C1-12烷基或雜烷基包括但不限於:甲基、乙基、正丙基、異丙基、-CH2C(CH3)(CH3)(OH)、環丙基、環丁基、丙基亞甲基、環丙醯基、苄氧基、三氟甲基、氨甲基、羥甲基、甲氧基、甲醯基、甲氧羰基、甲磺醯基、甲基亞磺醯基、乙氧基、乙醯基、乙磺醯基、乙氧羰基、二甲基氨基、二乙基氨基、二甲基氨基羰基、二乙基氨基羰基;N(CH3)2、NH(CH3)、-CH2CF3、
-CH2CH2CF3、-CH2CH2F、-CH2CH2S(=O)2CH3、-CH2CH2CN、、
、、、、、-CH2CH(OH)(CH3)2、
-CH2CH(F)(CH3)2、-CH2CH2F、-CH2CF3、-CH2CH2CF3、-CH2CH2NH2、-CH2CH2OH、-CH2CH2OCH3、-CH2CH2CH2OCH3、-CH2CH2N(CH3)2、
-S(=O)2CH3、-CH2CH2S(=O)2CH3、、、、、、
“被取代的”是指特定原子上的任意一個或多個氫原子被取代基取代,包括重氫和氫的變體,只要特定原子的價態是正常的並且取代後的化合物是穩定的。當取代基為酮基(即=O)時,意味著兩個氫原子被取代。酮取代不會發生在芳香基上。術語“任選被取代的”是指可以被取代,也可以不被取代,除非另有規定,取代基的種類和數目在化學上可以實現的基礎上可以是任意的。
當任何變數(例如R)在化合物的組成或結構中出現一次以上時,其在每一種情況下的定義都是獨立的。因此,例如,如果一個基團被0-2個R所取代,則所述基團可以任選地至多被兩個R所取代,並且每種情況下的R都有獨立的選項。此外,取代基和/或其變體的組合只有在這樣的組合會產生穩定的化合物的情況下才是被允許的。
當一個取代基的鍵可以交叉連接到一個環上的兩個原子時,這種取代基可以與這個環上的任意原子相鍵合。當所列舉的取代基中沒有指明其通過哪一個原子連接到化學結構通式中包括但未具體提及的化合物時,這種取代基可以通過其任何原子相鍵合。取代基和/或其變體的組合只有在這樣的組合會產生穩定的化合物的情況下才是被允許的。
烷基和雜烷基原子團的取代基一般被稱為“烷基取代基”,它們可以選自但不限於下列基團中的一個或多個:-R’、-OR’、=O、=NR’、=N-OR’、-NR’R”、-SR’、鹵素、-SiR’R”R'''、OC(O)R’、-C(O)R’、-CO2R’、-CONR’R”、-OC(O)NR’R”、-NR”C(O)R’、NR’C(O)NR”R'''、-NR”C(O)2R’、-NR'''''-C(NR’R”R''')=NR''''、NR''''C(NR’R”)=NR'''、-S(O)R’、-S(O)2R’、-S(O)2NR’R”、NR”SO2R’、-CN、-NO2、-N3、-CH(Ph)2和氟代(C1-C4)烷基,取代基的數目為0~(2m’+1),其中m’是這類原子團中碳原子的總數。R'、R”、R”'、R''''和R'''''各自獨立地優選氫、被取代或未被取代的雜烷基、被取代或未被取代的芳基(例如被1~3個鹵素取代芳基)、被取代或未被取代的烷基、烷氧基、硫代烷氧基基團或芳烷基。當本發明的化合物包括一個以上的R基團時,例如,每一個R基團是獨立地加以選擇的,如同當存在一個以上的R'、R”、R”'、R''''和R'''''基團時的每個這些基團。當R'和R”附著於同一個氮原子時,它們可與該氮原子結合形成5-,6-或7-元環。例如,-NR'R“意在包括但不僅限於1-吡咯烷基和4-嗎啉基。根據上述關於取代基的討論中,本領域技術人員可以理解,術語“烷基”意在包括碳原子鍵合於非氫基團所構成的基團,如鹵代烷基(例如-CF3、-CH2CF3)和醯基(例如-C(O)CH3、-C(O)CF3、-C(O)CH2OCH3等)。烷基和雜烷基原子團(包括通常被稱為亞烷基、鏈烯基、亞雜烷基、雜烯基、炔基、環烷基、雜環烷基、環烯基和雜環烯基的那些基團)的取代基一般被稱為“烷基取代基”,它們可以選自但不限於下列基團中的一個或多個:-R可、-OR可、=O、=NR可、=N-OR選、-NROR選、-SRO、鹵素、-SiRR選自但不限、OC(O)R自、-C(O)R自、-CO2R-、-CONR自但不、-OC(O)NR不
限於、-NRO)NR不限於、NRNRO)NR不限於下列基、-NRRO)NR2RN、-NRRO)NR不限於下列基團中的一個或多個:、NRRRO)NR不限於下列基團中的一、-S(O)RN、-S(O)2RS、-S(O)2NR(O)、NR(O)2RR、-CN、- -N2、-N3、-CH(Ph)2和氟代(C1-C4)烷基,取代基的數目為0~(2m基的數),其中m中是這類原子團中碳原子的總數。R'、R'、R'類、R'類原子和R'類原子團各自獨立地優選氫、被取代或未被取代的雜烷基、被取代或未被取代的芳基(例如被1~3個鹵素取代芳基)、被取代或未被取代的烷基、烷氧基、硫代烷氧基基團或芳烷基。當本發明的化合物包括一個以上的R基團時,例如,每一個R基團是獨立地加以選擇的,如同當存在一個以上的R'、R'、R'是、R'是獨立和R'是獨立地基團時的每個這些基團。當R'和R'附著於同一個氮原子時,它們可與該氮原子結合形成5-、6-或7-元環。例如,-NR'R,意在包括但不僅限於1-吡咯烷基和4-嗎啉基。根據上述關於取代基的討論中,本領域技術人員可以理解,術語“烷基”意在包括碳原子鍵合於非氫基團所構成的基團,如鹵代烷基(例如-CF3、-CH2CF3)和醯基(例如-C(O)CH3、-C(O)CF3、-C(O)CH2OCH3等)。
與烷基原子團所述取代基相似,芳基和雜芳基取代基一般統稱為“芳基取代基”,選自例如-R自、-OR例、-NR例如如、-SR例、-鹵素,-SiR,選自例如如、OC(O)R,、-C(O)R,、-CO2R-、-CONRR,選、-OC(O)NR自例如、-NRO)NR自例如、NRNRO)NR自例如如似,、-NRRO)NR2RN、-NRRO)NR自例如如似,芳基和雜芳基取代基、NRRRO)NR自例如如似,芳基和雜、-S(O)RN、-S(O)2RS、-S(O)2NR(O)、-NR(O)2RR、-CN、-N2、-N3、-CH(Ph)2、氟(C1-C4)烷氧基和氟(C1-C4)烷基等,取代基的數量為0到芳香環上開放化合價的總數之間;其中R芳、R芳、R芳香、R芳香環和R芳香環獨立地優選自氫、被取代或未被取代的烷基、被取代或未被取代的雜烷基、被取代或未被取代的芳基和被取代或未被取代的雜芳基。當本發明的化合物包括一個以上的R基團時,例如,每個R基團是獨立地加以選擇的,如同當存在一個以上R團、R團、R團是、R團是獨和R團是獨基團時的每個這些基團。
芳基或雜芳基環的相鄰原子上的兩個取代基可以任選地被通式為-基或雜芳基環的相鄰RR’)q-U-的取代基所取代,其中T和U獨立地選自-NR-、-O-、CRR'-或單鍵,q是0到3的整數。
可選地,芳基或雜芳基環上相鄰原子上的兩個取代基可以任意地被通式為-A(CH2)rB-的取代基取代,其中,A和B獨立地選自-CRR’-、-O-、-NR-、-S-、-S(O)-、S(O)2-、-S(O)2NR’-或單鍵,r為1到4的整數。新成環上的一個單鍵可任選地替換為雙鍵。可選地,芳基或雜芳基上相鄰原子上的兩個取代基可任意地被通式為-(CRR’)s-X-(CR”R''')d-的取代基取代,其中,s和d分別獨立地選自0到3的整數,X選自-O-、-NR’-、-S-、-S(O)-、-S(O)2-或-S(O)2NR’-。R、R’、R”或R'''分別獨立地優選自H、任選被取代的C1-6烷基。
“鹵代”或“鹵素”,作為其本身,或作為另一取代基的部分,除非特例條件下,意指氟,氯,溴,或碘原子。另外,“鹵代烷基”意為包括單鹵代烷基和多鹵代烷基。比如,“鹵代(C1-C4)烷基”意為包括而不受限於,三氟甲基,2,2,2-三氟乙酯基,4-氯化丁基,3-溴丙基,以及其他。
關於鹵代烷基的例子包括,而不受限於,三氟甲基,三氯甲基,五氟乙基,和五氯乙基。“烷氧基”意指以上被定義的,且伴有通過氧橋連接的碳原子特定數目的,任何烷基。C1-6烷氧基意為包括C1、C2、C3、C4、C5、和C6的烷氧基。烷氧基的相關例子包括,而不受限於,甲氧基,乙氧基,正丙氧基,異丙氧基,正丁氧基,第二丁氧基,第三丁氧基,正戊氧基,和第二戊氧基。“環烷基”意指飽和環,如,環丙基,環丁基,或環戊基。3-7環烷基意指包括了C3、C4、C5、C6、和C7的環烷基。“鏈烯基”意指直鏈或支鏈的烴鏈,同時,一個或一個以上的非飽和C-C鍵可能在鏈上任意一個穩定的位置出現,比如乙烯基和丙烯基。
此處使用的“鹵代”或“鹵素”意指氟代,氯代,溴代,碘代。
此處的“雜的”意為,除非有特例情況出現,“雜原子”或“雜自由基”(即,含有雜原子的自由基),包括除了碳原子和氫原子以外的所有原子,同
時包括具有上述雜原子的自由基。相關例子包括氧(O),氮(N),硫(S),硒(Si),鍺(Ge),鋁(Al)和硼(B),同時還包括被任意取代的-C(=O)N(H)-、-N(H)-、-C(=NH)-、-S(=O)2N(H)-、或-S(=O)N(H)-。
本文所用的“環”表示被取代或未被取代的環烷基、被取代或未被取代的雜環烷基、被取代或未被取代的芳基或被取代或未被取代的雜芳基。所謂的環包括稠環。環上原子的數目通常被定義為環的元數,例如,“5~7元環”是指環繞排列5~7個原子。除非另有規定,該環任選地包含1~3個雜原子。因此,“5~7元環”包括例如苯基吡啶和呱啶基;另一方面,術語“5~7元雜環烷基環”包括吡啶基和呱啶基,但不包括苯基。術語“環”還包括含有至少一個環的環系,其中的每一個“環”均獨立地符合上述定義。
如本文所用,術語“雜環”或“雜環基”意指穩定的含雜原子或雜原子團的單環、雙環或三環,它們可以是飽和的、部分不飽和的或不飽和的(芳族的),它們包含碳原子和1、2、3或4個獨立地選自N、O和S的環雜原子,其中上述任意雜環可以稠合到一個苯環上形成雙環。氮和硫雜原子可任選被氧化(即NO和S(O)p)。氮原子可以是被取代的或未取代的(即N或NR,其中R是H或本文已經定義過的其他取代基)。該雜環可以附著到任何雜原子或碳原子的側基上從而形成穩定的結構。如果產生的化合物是穩定的,本文所述的雜環可以發生碳位或氮位上的取代。雜環中的氮原子任選地被第四銨化。一個優選方案是,當雜環中S及O原子的總數超過1時,這些雜原子彼此不相鄰。另一個優選方案是,雜環中S及O原子的總數不超過1。如本文所用,術語“芳族雜環基團”或“雜芳基”意指穩定的5、6、7元單環或雙環或7、8、9或10元雙環雜環基的芳香環,它包含碳原子和1、2、3或4個獨立地選自N、O和S的環雜原子。氮原子可以是被取代的或未取代的(即N或NR,其中R是H或本文已經定義過的其他取代基)。氮和硫雜原子可任選被氧化(即NO和S(O)p)。值得注意的是,芳香雜環上S和O原子的總數不超過1。
橋環也包含在雜環的定義中。當一個或多個原子(即C、O、N或S)連接兩個不相鄰的碳原子或氮原子時形成橋環。優選的橋環包括但不限於:一個碳原子、兩個碳原子、一個氮原子、兩個氮原子和一個碳-氮基。值得注意的是,一個橋總是將單環轉換成三環。橋環中,環上的取代基也可以出現在橋上。
雜環化合物的實例包括但不限於:吖啶基、吖辛因基、苯並咪唑基、苯並呋喃基、苯並巰基呋喃基、苯並巰基苯基、苯並惡唑基、苯並惡唑啉基、苯並噻唑基、苯並三唑基、苯並四唑基、苯並異惡唑基、苯並異噻唑基、苯並咪唑啉基、哢唑基、4aH-哢唑基、哢啉基、苯並二氫吡喃基、色烯、噌啉基十氫喹啉基、2H,6H-1,5,2-二噻嗪基、二氫呋喃並[2,3-b]四氫呋喃基、呋喃基、呋咱基、咪唑烷基、咪唑啉基、咪唑基、1H-吲唑基、吲哚烯基、二氫吲哚基、中氮茚基、吲哚基、3H-吲哚基、isatino基、異苯並呋喃基、吡喃、異吲哚基、異二氫吲哚基、異吲哚基、吲哚基、異喹啉基、異噻唑基、異惡唑基、亞甲二氧基苯基、嗎啉基、萘啶基,八氫異喹啉基、惡二唑基、1,2,3-惡二唑基、1,2,4-惡二唑基、1,2,5-惡二唑基、1,3,4-惡二唑基、惡唑烷基、惡唑基、異惡唑基、羥吲哚基、嘧啶基、菲啶基、菲咯啉基、吩嗪、吩噻嗪、苯並黃嘌呤基、酚惡嗪基、酞嗪基、呱嗪基、呱啶基、呱啶酮基、4-呱啶酮基、胡椒基、蝶啶基、嘌呤基、吡喃基、吡嗪基、吡唑烷基、吡唑啉基、吡唑基、噠嗪基、吡啶並惡唑、吡啶並咪唑、吡啶並噻唑、吡啶基、嘧啶基、吡咯烷基、吡咯啉基、2H-吡咯基、吡咯基、吡唑基、喹唑啉基、喹啉基、4H-喹嗪基、喹喔啉基、奎寧環基、四氫呋喃基、四氫異喹啉基、四氫喹啉基、四唑基,6H-1,2,5-噻二嗪基、1,2,3-噻二唑基、1,2,4-噻二唑基、1,2,5-噻二唑基、1,3,4-噻二唑基、噻蒽基、噻唑基、異噻唑基噻吩基、噻吩基、噻吩並惡唑基、噻吩並噻唑基、噻吩並咪唑基、噻吩基、三嗪基、1,2,3-三唑基、1,2,4-三唑基、1,2,5-三唑基、1,3,4-三唑基和呫噸基。還包括稠環和螺環化合物。
術語“烴基”或者其下位概念(比如烷基、烯基、炔基、苯基等等)本身或者作為另一取代基的一部分表示直鏈的、支鏈的或環狀的烴原子團或其組合,可以是完全飽和的、單元或多元不飽和的,可以是單取代、二取代或多取代的,可以是一價(如甲基)、二價(如亞甲基)或者多價(如次甲基),可以包括二價或多價原子團,具有指定數量的碳原子(如C1-C10表示1至10個碳)。碳烴基”包括但不限於脂肪烴基和芳香烴基,所述脂肪烴基包括鏈狀和環狀,具體包括但不限於烷基、烯基、炔基,所述芳香烴基包括但不限於6-12元的芳香烴基,例如苯、萘等。在一些實施例中,術語“烷基”表示直鏈的或支鏈的原子團或它們的組合,可以是完全飽和的、單元或多元不飽和的,可以包括二價和多價原子團。飽和烴原子團的實例包括但不限於甲基、乙基、正丙基、異丙基、正丁基、第三丁基、異丁基、第二丁基、異丁基、環己基、(環己基)甲基、環丙基甲基,以及正戊基、正己基、正庚基、正辛基等原子團的同系物或異構體。不飽和烷基具有一個或多個雙鍵或三鍵,其實例包括但不限於乙烯基、2-丙烯基、丁烯基、巴豆基、2-異戊烯基、2-(丁二烯基)、2,4-戊二烯基、3-(1,4-戊二烯基)、乙炔基、1-和3-丙炔基,3-丁炔基,以及更高級的同系物和異構體。
除非另有規定,術語“雜烴基”或者其下位概念(比如雜烷基、雜烯基、雜炔基、雜芳基等等)本身或者與另一術語聯合表示穩定的直鏈的、支鏈的或環狀的烴原子團或其組合,有一定數目的碳原子和至少一個雜原子組成。在一些實施例中,術語“雜烷基”本身或者與另一術語聯合表示穩定的直鏈的、支鏈的烴原子團或其組合物,有一定數目的碳原子和至少一個雜原子組成。在一個典型實施例中,雜原子選自B、O、N和S,其中氮和硫原子任選地被氧化,氮雜原子任選地被第四銨化。雜原子B、O、N和S可以位於雜烴基的任何內部位置(包括該烴基附著于分子其餘部分的位置)。實例包括但不限於-CH2-CH2-O-CH3、-CH2-CH2-NH-CH3、-CH2-CH2-N(CH3)-CH3、-CH2-S-CH2-CH3、-CH2-CH2、-S(O)-CH3、-CH2-CH2-S(O)2-CH3、-CH=CH-O-CH3、
-CH2-CH=N-OCH3和-CH2-CH=N-OCH3CH。至多兩個雜原子可以是連續的,例如-CH2-NH-OCH3。
術語“烷氧基”、“烷氨基”和“烷硫基”(或硫代烷氧基)屬於慣用表達,是指分別通過一個氧原子、氨基或硫原子連接到分子的其餘部分的那些烷基基團。
術語“環烴基”、“雜環烴基”或者其下位概念(比如芳基、雜芳基、環烷基、雜環烷基、環烯基、雜環烯基、環炔基、雜環炔基等等)本身或與其他術語聯合分別表示環化的“烴基”、“雜烴基”。此外,就雜烴基或雜環烴基(比如雜烷基、雜環烷基)而言,雜原子可以佔據該雜環附著于分子其餘部分的位置。環烷基的實例包括但不限於環戊基、環己基、1-環己烯基、3-環己烯基、環庚基等。雜環基的非限制性實例包括1-(1,2,5,6-四氫吡啶基)、1-呱啶基、2-呱啶基,3-呱啶基、4-嗎啉基、3-嗎啉基、四氫呋喃-2-基、四氫呋喃吲哚-3-基、四氫噻吩-2-基、四氫噻吩-3-基,1-呱嗪基和2-呱嗪基。
術語“芳基”表示多不飽和的芳族烴取代基,可以是單取代、二取代或多取代的,可以是一價、二價或者多價,它可以是單環或多環(優選1至3個環),它們稠合在一起或共價連接。術語“雜芳基”是指含有一至四個雜原子的芳基(或環)。在一個示範性實例中,雜原子選自B、N、O和S,其中氮和硫原子任選地被氧化,氮原子任選地被第四銨化。雜芳基可通過雜原子連接到分子的其餘部分。芳基或雜芳基的非限制性實施例包括苯基、1-萘基、2-萘基、4-聯苯基、1-吡咯基、2-吡咯基、3-吡咯基、3-吡唑基、2-咪唑基、4-咪唑基、吡嗪基、2-惡唑基、4-惡唑基、2-苯基-4-惡唑基、5-惡唑基、3-異惡唑基、4-異惡唑基、5-異惡唑基、2-噻唑基、4-噻唑基、5-噻唑基、2-呋喃基、3-呋喃基、2-噻吩基、3-噻吩基、2-吡啶基、3-吡啶基、4-吡啶基、2-嘧啶基、4-嘧啶基、5-苯並噻唑基、嘌呤基、2-苯並咪唑基、5-吲哚基、1-異喹啉基、5-異喹啉基、2-喹喔啉基、5-喹喔啉基、3-喹啉基和6-喹啉基。上述任意一個芳基和雜芳基環系的取代基選自下文所述的可接受的取代基。
為簡便起見,芳基在與其他術語聯合使用時(例如芳氧基、芳硫基、芳烷基)包括如上定義的芳基和雜芳基環。因此,術語“芳烷基”意在包括芳基附著於烷基的那些原子團(例如苄基、苯乙基、吡啶基甲基等),包括其中碳原子(如亞甲基)已經被例如氧原子代替的那些烷基,例如苯氧基甲基、2-吡啶氧甲基3-(1-萘氧基)丙基等。
術語“離去基團”是指可以被另一種官能團或原子通過取代反應(例如親和取代反應)所取代的官能團或原子。例如,代表性的離去基團包括三氟甲磺酸酯;氯、溴、碘;磺酸酯基,如甲磺酸酯、甲苯磺酸酯、對溴苯磺酸酯、對甲苯磺酸酯等;醯氧基,如乙醯氧基、三氟乙醯氧基等等。
術語“保護基”包括但不限於“氨基保護基”、“羥基保護基”或“巰基保護基”。術語“氨基保護基”是指適合用於阻止氨基氮位上副反應的保護基團。代表性的氨基保護基包括但不限於:甲醯基;醯基,例如鏈烷醯基(如乙醯基、三氯乙醯基或三氟乙醯基);烷氧基羰基,如第三丁氧基羰基(Boc);芳基甲氧羰基,如苄氧羰基(Cbz)和9-芴甲氧羰基(Fmoc);芳基甲基,如苄基(Bn)、三苯甲基(Tr)、1,1-二-(4'-甲氧基苯基)甲基;甲矽烷基,如三甲基甲矽烷基(TMS)和第三丁基二甲基甲矽烷基(TBS)等等。術語“羥基保護基”是指適合用於阻止羥基副反應的保護基。代表性羥基保護基包括但不限於:烷基,如甲基、乙基和第三丁基;醯基,例如鏈烷醯基(如乙醯基);芳基甲基,如苄基(Bn),對甲氧基苄基(PMB)、9-芴基甲基(Fm)和二苯基甲基(二苯甲基,DPM);甲矽烷基,如三甲基甲矽烷基(TMS)和第三丁基二甲基甲矽烷基(TBS)等等。
細胞結合劑是抗體時,其與是多肽並且可能是跨膜分子(例如受體)或配體(如生長因數)的抗原結合。
示例性抗原包括分子(如腎素);生長激素(包括人生長激素和牛生長激素);生長激素釋放因數;甲狀旁腺激素;促甲狀腺激素;脂蛋白;α-1-抗胰蛋白酶;胰島素A鏈;胰島素B鏈;胰島素原;促卵泡激素;降鈣素;促黃
體素;胰高血糖素;凝血因數(如因數vmc、因數IX、組織因數(TF)和血管性血友病因數(von Willebrands factor));抗凝血因數,如蛋白質C;心房利鈉因數;肺表面活性劑;纖溶酶原啟動物(如尿激酶或人尿或組織型纖溶酶原啟動物(t-PA));蛙皮素;凝血酶;造血生長因數;腫瘤壞死因數-α和-β;腦啡肽酶;RANTES(對通常T細胞表達和分泌活化的調節);人巨噬細胞炎性蛋白(MIP-I-α);血清白蛋白(如人血清白蛋白);苗勒抑制物質(Muellerian-inhibiting substance);鬆弛素A鏈;鬆弛素B鏈;前鬆弛素;鼠促性腺激素相關肽;微生物蛋白質(如β內醯胺酶);DNase;IgE;細胞毒性T淋巴細胞相關抗原(CTLA),如CTLA-4;抑制素;啟動蛋白;血管內皮生長因數(VEGF);激素或生長因數受體;蛋白質A或D;類風濕因數;神經營養因數(如骨衍生的神經營養因數(BDNF)、神經營養蛋白-3、-4、-5或-6(NT-3、NT4、NT-5或NT-6)),或神經生長因數(如NGF-β);血小板衍生生長因數(PDGF);成纖維細胞生長因數(如aFGF和bFGF);表皮生長因數(EGF);轉化生長因數(TGF),如TGF-α和TGF-β,包括TGF-β1、TGF-β2、TGF-β3、TGF-β4或TGF-β5;胰島素樣生長因數-I和-II(IGF-I和IGF-II);des(1-3)-IGF-I(腦IGF-I)、胰島素樣生長因數結合蛋白、EpCAM、GD3、FLT3、PSMA、PSCA、MUC1、MUC16、STEAP、CEA、TENB2、EphA受體、EphB受體、葉酸受體、FOLR1、間皮素、cripto、αvβ6、整聯蛋白、VEGF、VEGFR、運鐵蛋白受體、IRTA1、IRTA2、IRTA3、IRTA4、IRTA5;CD蛋白,如CD2、CD3、CD4、CD5、CD6、CD8、CD11、CD14、CD19、CD20、CD21、CD22、CD23、CD25、CD26、CD28、CD30、CD33、CD36、CD37、CD38、CD40、CD44、CD52、CD55、CD56、CD59、CD70、CD79、CD80、CD81、CD103、CD105、CD134、CD137、CD138、CD152;促紅細胞生成素;骨誘導因數;免疫毒素;骨形態發生蛋白(BMP);幹擾素,如幹擾素-α、-β和-γ;集落刺激因數(CSF)(例如M-CSF、GM-CSF和G-CSF);白細胞介素(IL),例如IL-1至IL-10;超氧化物歧化酶;T細胞受體;表面膜蛋白;衰變加速因數;病毒抗原,例如HIV包
膜的一部分;轉運蛋白;歸巢受體;地址素;調節蛋白;整聯蛋白,如CD1 Ia、CD1 Ib、CD1 Ic、CD18、ICAM、VLA-4和VCAM;腫瘤相關抗原,如HER2、HER3或HER4受體;以及任何以上列出的多肽的片段、抗體擬似物Adnectins(US申請20070082365),或公開於美國公佈第20080171040號或美國公佈第20080305044號的結合一種或多種腫瘤相關抗原或細胞表面受體的抗體,所述美國公佈以引用方式整體併入本文。
本發明包括的用於抗體的優選抗原包括CD蛋白,如CD2、CD3、CD4、CD5、CD6、CD8、CD11、CD14、CD18、CD19、CD20、CD21、CD22、CD25、CD26、CD27、CD28、CD30、CD33、CD36、CD37、CD38、CD40、CD44、CD52、CD55、CD56、CD70、CD79、CD80、CD81、CD103、CD105、CD134、CD137、CD138和CD152;ErbB受體家族的成員,如EGF受體、HER2、HER3或HER4受體;細胞粘附分子,如LFA-I、Macl、pi50.95、VLA-4、ICAM-I、VCAM、EpCAM、α4/β7整聯蛋白和αv/β3整聯蛋白,包括其α或β亞類(例如抗CD1 Ia、抗CD18或抗CD1 Ib抗體);生長因數,如VEGF;組織因數(TF);TGF-β;α幹擾素(α-IFN);白細胞介素,如IL-8;IgE;血型抗原Apo2、死亡受體;flk2/flt3受體;肥胖(OB)受體;mpl受體;CTLA-4;蛋白質C等。
本文中最優選的靶標是IGF-IR、CanAg、EphA2、MUC1、MUC16、VEGF、TF、CD19、CD20、CD22、CD27、CD33、CD37、CD38、CD40、CD44、CD56、CD138、CA6、Her2/neu、EpCAM、CRIPTO(在大部分人乳腺癌細胞中高水準產生的蛋白質)、darpins、α v/β3整聯蛋白、αv/β5整聯蛋白、αv/β6整聯蛋白、TGF-β、CD1 Ia、CD18、Apo2和C242或公開於美國公佈第20080171040號或美國公佈第20080305044號的與一種或多種腫瘤相關抗原或細胞表面受體結合的抗體,所述美國公佈以引用方式整體併入本文。
本發明包括的用於抗體的優選抗原還包括CD蛋白,如CD3、CD4、CD8、CD19、CD20、CD27、CD34、CD37、CD38、CD46、CD56、CD70和CD138;ErbB受體家族的成員,如EGF受體、HER2、HER3或HER4受體;
細胞粘附分子如LFA-I、Macl、p150.95、VLA-4、ICAM-I、VCAM、EpCAM、α4/β7整聯蛋白和αv/β3整聯蛋白,包括其α或β亞類(例如抗CD1Ia、抗CD18或抗CD1Ib抗體);生長因數,如VEGF;組織因數(TF);TGF-β;α幹擾素(α-IFN);白細胞介素,如IL-8;IgE;血型抗原Apo2、死亡受體;flk2/flt3受體;肥胖(OB)受體;mpl受體;CTLA-4;蛋白質C等。本文中最優選的靶標是IGF-IR、CanAg、EGF-R、EGF-RvIII、EphA2、MUC1、MUC16、VEGF、TF、CD19、CD20、CD22、CD27、CD33、CD37、CD38、CD40、CD44、CD56、CD70、CD138、CA6、Her2/neu、CRIPTO(在大部分人乳腺癌細胞中高水準產生的蛋白質)、αv/β3整聯蛋白、αv/β5整聯蛋白、TGF-β、CD1 Ia、CD18、Apo2、EpCAM和C242。
單克隆抗體技術允許以單克隆抗體形式生產特異性細胞結合劑。本領域特別熟知的是用於製造通過用研究中的抗原(如完整靶細胞、從靶細胞分離的抗原、全病毒、減毒全病毒和病毒蛋白質(如病毒外殼蛋白))免疫小鼠、大鼠、倉鼠或任何其它哺乳動物生產單克隆抗體的技術。也可使用敏化人細胞。另一種製造單克隆抗體的方法是使用sFv(單鏈可變區),特別是人sFv的噬菌體庫(參見,例如Griffiths等人,美國專利第5,885,793號;McCafferty等人,WO 92/01047;Liming等人,WO 99/06587)。
適當的細胞結合劑的選擇是取決於要靶向的特定細胞群體的選擇事項,但一般來講,單克隆抗體和其表位結合片段是優選的(如果有適當的可用)。
例如,單克隆抗體My9是鼠IgG2a抗體,其對急性骨髓性白血病(AML)細胞上發現的CD33抗原有特異性(Roy等人,Blood 77:2404-2412(1991))並且可用於治療AML患者。類似地,單克隆抗體抗B4是鼠IgGi,其與B細胞上的CD19抗原結合(Nadler等人,J Immunol.131:244-250(1983)),並且如果靶細胞是B細胞或在諸如非霍奇金淋巴瘤或慢性淋巴母細胞白血病中表達該抗原的患病細胞,則可以使用所述抗體。抗體N901是鼠單克隆IgGi抗體,其與在小細胞肺癌細胞和其它神經內分泌起源的腫瘤細胞上發現的CD56結合(Roy
等人,J Nat.Cancer Inst.88:1136-1145(1996));huC242是與CanAg抗原結合的抗體;曲妥珠單抗是與HER2/neu結合的抗體;以及抗EGF受體抗體與EGF受體結合。
藥物單元(D)可為任何細胞毒性藥物、細胞生長抑制劑藥物或免疫抑制劑藥物,在本文中亦稱為細胞毒性劑、細胞生長抑制劑或免疫抑制劑。藥物單元具有可與結合劑單元形成一個鍵的的原子。在一些實例中,藥物單元D具有可與結合劑單元形成一個鍵的氮原子。在其他實例中,藥物單元D具有可與結合劑單元形成一個鍵的羧酸。在其他實例中,藥物單元D具有可以喝結合劑單元形成一個鍵的巰基。在其他實例中,藥物單元D具有可與結合劑單元形成一個鍵的羥基或酮。
適用於此類的細胞毒性劑或免疫抑制劑包括例如微管蛋白劑、奧瑞他汀、DNA小溝結合劑、DNA複製抑制劑、烷基化試劑(例如鉑複合物,諸如順鉑、單價鉑、雙價鉑及三價鉑複合物以及卡鉑)、蒽環黴素、抗生素、抗葉酸劑、抗代謝物、化學療法增感劑、達卡黴素類、依託泊苷(etoposide)、氟化嘧啶、離子載體、lexitropsin、亞硝基脲、順氯胺鉑(platinol)、預成型化合物、嘌呤抗代謝物、嘌呤黴素(puromycine)、輻射增感劑、類固醇、紫衫烷、topoisornerase inhibitors、長春花生物鹼或其類似物。特別是細胞毒性劑有用的此類實例包括例如DNA小溝結合劑、DNA烷化劑及微管蛋白抑制劑。細胞毒性劑的例子還包括如奧瑞塔汀、喜樹堿、倍癌黴素、依託泊苷、美登素(maytansine)及類美登素(例如DM1及DM4)、紫杉烷、苯並二氮平(例如吡咯並[1,4]苯並二氮平(PBD)、吲哚林並苯並二氮平及惡唑並苯並二氮平)及長春花生物鹼。含有藥物之所選苯並二氮平描述與WO 2010/091 150,WO 2012/1 12708,WO 2007/085930,和WO 201 1/023883。
個別細胞毒性劑或免疫抑制劑,包括例如雄性激素、安麯黴素(anthramycin)(AMC)、天冬硫胺酶、5-氮雜細胞嘧啶核苷、硫唑嘌呤、第一萊黴素(bleomycin)、白消安(busulfan)、丁硫酸亞碸亞胺、刺孢黴素、
喜樹鹼、卡鉑、卡莫斯汀(carmustine)(BSNU)、CC-1065、苯丁酸氮芥、順鉑、秋水仙鹼、環磷醯胺、阿糖胞苷、報嘧啶核苷阿拉第一糖苷、細胞細胞鬆弛素B、達卡巴嗪(dacarbazine)、放線菌素(先前為放射菌素)、到諾黴素(daunorubicin)、多西他賽(docetaxel)、小紅莓、依託泊苷、雌性激素、5-氟去氧尿苷、5-氟尿嘧啶、吉他西濱(gemcitabine)、短桿菌素D、羥基脲、伊達比星(idarubicin)、異環磷醯胺、伊立替康(irinotecan)、洛莫司汀(lomustine)(CCNU)、美登素、氮芥、美法侖(melphalan)、6-巰基嘌呤、塞替派(thioTEPA)、拓撲替康(topotecan)、長春鹼、長春新鹼、長春瑞濱(vinorelbine)、VP-16及VM-26。
在一些典型實施例中,適合細胞毒性劑包括例如DNA小溝結合劑(例如烯二炔及萊克希托普森、CBI化合物;亦參見美國專利US6130237)、倍癌黴素(參見美國專利,公開號20060024317)、紫杉烷(例如太平洋紫杉醇及多烯紫杉醇)、嘌呤黴素、長春花生物鹼、CC-1065、SN-38、拓撲替康、(N-嗎啉基)-小紅莓、根黴素、氰基(N-嗎啉基)-小紅莓、棘黴素、考布他汀(combretastatin)、紡錘菌素、埃坡黴素(epothilone)A及B、雌莫司汀(estramustine)、克瑞普托非森(cryptophysin)、西馬多丁(cemadotin)、類美登素、迪斯德莫來(discodermolide)、艾榴素(eleutherobin)及米托蒽醌(mitoxantrone)。
在一些實施例中,藥物單元為抗-微管蛋白劑。抗-微管蛋白劑的實例包括(但不限於)紫杉烷(例如Taxol®(太平洋紫杉醇)、Taxoterc®(多西紫杉醇))、T67(Tularik)及長春花生物鹼(例如長春新堿、長春堿、長春地辛(vindesine)及長春瑞濱)。其他抗微管蛋白劑包括例如漿果赤黴素衍生物、紫杉烷類似物(例如埃坡黴素A及B)、諾考達唑(nocodazole)、秋水仙堿及秋水醯胺(colcimid)、雌莫司汀、克瑞普托非森、西馬多丁、類美登素、考布他汀、迪斯德莫來及艾榴素。
在一些實施例中,細胞毒性劑為美登素或類美登素(另一組抗-微管蛋白劑)。(ImmuoGen,Inc.;亦參見Chai等人,1992,Cancer Res.52:127-131及美國專利US 8163888。
在一些實施例中,藥物單元為奧瑞他汀。奧瑞他汀包括(但不限於)AE、AFP、AEB、AEVB、MMAF及MMAE。奧瑞他汀的合成及結構描述於美國專利申請公開案號第200-0083263號、第2005-0238649號、第2005-0009751號、第2009-0111756號及第2011-0020343號;國際專利WO 04/010957、WO02/088172及美國專利US7659241及US8343928中;其各自以全文引用的方式且出於所有目的併入本文中。本發明的例示性奧瑞他汀結合微管蛋白且對所需細胞株發揮細胞毒性或細胞生長抑制作用。
例示性奧瑞他汀藥物單元具有下式或其藥學上可接受的鹽,其中波形線指示結合劑單元連接的位元點:
在一些實施例中,藥物為苯並二氮平(包括含有藥物的苯並二氮平,例如吡咯並[1,4]苯並二氮平(PBD)、吲哚林並苯並二氮平及惡唑啶並苯並二
氮平)。PBD具有以下通式結構:。
取代基的數目、類型及位置:其芳族A環及吡咯並C環基C環的飽和度可不同。在B環中,在N10-C11位置處存在亞胺(N=C)、甲醇胺(NC-CH(OH))或甲醇胺甲醚(NH-CN(OMe)),其為負責烷化DNA的親電子中心。所有已知天然產物在對手性C11a位置處均具有(S)構型,當由C環朝向A環查看時,該(S)構型能為其提供右旋扭轉。此為其提供與B型DNA
小溝的等螺旋性的適當三維結構,從而在結合位元點處緊密貼合。PBD在小溝中形成加合物的能力使其能夠幹擾DNA的合成,因此其用作抗腫瘤劑。此等分子的生物活性可通過例如使兩個PBD單元經由其C8/C’-羥基經一個靈活的烷基連接而增強。認為PBD二聚體形成序列選擇性DNA損傷,諸如被認為主要負責其生物活性的倒序5'-Pu-GATC-Py-3'股間交聯。
連接體、藥物連接共軛物和抗體-藥物偶聯物的通式製備方法如下。
方法1如下所示:
羥基烷胺1和半縮醛例如三氟乙醛甲基半縮醛在甲苯等溶劑中回流溫度下反應同時除水,生成惡唑烷中間體2。然後惡唑烷2與格式試劑或類似強鹼反應生成羥基烷胺中間體3。3經適當氧化劑如鐘斯試劑或過碘酸在三氧化鉻的催化下氧化,然後經酯化生成酯中間體4。對中間體4的官能團進行適當轉換或操作得到含可進一步轉化的合適位點的中間體5。
方法2如下所示:
方法1中的羥基烷胺3同樣可以根據Gosselin,F.,et.al.,Org.Lett.2004,6,641 and Roy,A.,et.al.,J.Org.Chem.2006,71,4320非對映選擇方法製備,得到3a,具有很高的非對映選擇性。
方法3如下所示:
胺基酸7經適合的保護基保護其氨基,再與4-氨基苄醇反應得中間體8。然後除去氨基上的保護基得到中間體9。
方法4如下所示:
方法1中的中間體5與方法3中的中間體8反應得中間體10。中間體10再經反應得到4-硝基苄基碳酸酯為中間體11。
方法5如下所示:
方法4中的中間體11在適當條件下與DMEA反應得到藥物連接體中間體12。
方法6如下所示:
中間體12在如相應實驗部分描述的適當條件下與目標抗體結合。
赫賽汀藥物連接共軛體中間體的一般製備方法如下。
步驟1:抗體二硫鍵的還原與純化。將8.955ml赫賽汀(26.8mg/ml,約30mg.ml)與8.95μL0.5MTCEP(反應液中TCEP的最終濃度為0.5mM)混合,然後室溫反應2小時。然後將反應液轉入一個1ml蛋白質A親和柱除去殘留TCEP和其它非單抗雜質。純化後,用1MTris將洗脫液PH調至6.0左右,使用分光光度計測量單抗的濃度。溶液的最終體積約為20ml,單抗的濃度約為11.6mg/ml。
步驟2:藥物連接體與抗體結合。將溶液平均分配到兩支試管中(每支10ml),向每支試管中加入藥物連接體中間體的DMSO溶液1ml(25mg/ml)。
藥物連接體與當克隆抗體的比例為5:1。室溫反應約12小時。反應結束後,將兩支試管中的溶液合併,然後在5000轉/分鐘的條件下離心5分鐘,離心液經蛋白質A親和柱純化除去為反應的藥物連接體中間體。用1M Tris緩衝液將洗脫液PH調至6.0。
本發明將通過實施例進一步說明,一下實施例僅對本發明做進一步解釋說明,而不對本發明做任何限制。本發明的化合物可以通過本領域技術人員所熟知的多種合成方法來製備,包括下面列舉的具體實施方式、其與其他化學合成方法的結合所形成的實施方式以及本領域技術上人員所熟知的等同替換方式,優選的實施方式包括但不限於本發明的實施例。
本發明所使用的所有溶劑是市售的,無需進一步純化即可使用。反應一般是在惰性氮氣下、無水溶劑中進行的。質子核磁共振資料記錄在Bruker Avance III 400(400MHz)分光儀上,化學位移以四甲基矽烷低場處的(ppm)表示。質譜是在安捷倫1200系列加6110(&1956A)上測定。LC/MS或Shimadzu MS包含一個DAD:SPD-M20A(LC)和Shimadzu Micromass 2020檢測器。質譜儀配備有一個正或負模式下操作的電噴霧離子源(ESI)。
本發明採用下述縮略詞:ADC代表antibody-drug conjugate;aq代表水;mAb代表單克隆抗體;MTMH代表1-馬來醯亞胺基-6-三氟甲基己基-6-
基,其結構為;(S)-MTMH代表;(R)-MTMH代
表;PABO(CO)代表;ABA代表;
MMAE代表;Fmoc-Cl代表9-芴甲基氯甲
酸酯;DIAD代表偶氮二異丁腈;Z-Glu-OMe代表(S)-4-(((苄基)羰基)氨基)-5-甲氧基-5-oxopentanic acid;HATU is 1-[Bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium 3-oxid
hexafluorophosphate;EDCI is 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide;DMSO is Dimethyl sulfoxide;HOBT is Hydroxybenzotriazole;DCM is dichloromethane;PE is petroleum ether;DMF is N,N-dimethylformamide;DMSO is dimethylsulfoxide;EtOAc is ethyl acetate;EtOH is ethanol;MeOH is methanol;Cbz is benzyloxycarbonyl,a amine protecting group;BOC is tert-butylcarbonyl,amine protecting group;HOAc is acetic acid;NaBH(OAc)3 is sodium triacetoxyborohydride;r.t.is room temperature;THF is tetrahydrofuran; Boc2O is di-tert-butyl dicarbonate;TFA is trifluoroacetic acid;DIPEA is diisopropylethylamine;Pd(dppf)Cl2 is [1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium(II);POCl3 is phosphorus oxychloride;NaH is sodium hydride;LAH is Lithium Aluminium Hydride;Pd(OAc)2 is Palladium(II)acetate;Pd2(dba)3 is tris(dibenzylideneacetone)dipalladium;Pd(PPh3)4 is tetrakis(triphenylphosphine)palladium;Et3SiH is triethylsilane;PPh3 is triphenyl phosphine;Xantphos is 4,5-Bis(diphenylphosphino)-9,9-dimethylxanthene;MeSO3H is methanesulfonic acid;Xphos is 2-Dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl;Lawesson’s reagent is 2,4-Bis(4-methoxylphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide;NBS is N-bromosuccinimide;t-BuOK is potassium tert-butylate。
化合物我經手工或ChemDraw®命名,市售化合物採用供應商目錄名稱。
為讓本發明之上述和其他目的、特徵和優點能更明顯易懂,下文特舉數個較佳實施例,並配合所附圖式,作詳細說明如下:圖1展示了Herceptin和不同ADCs的抗癌細胞增殖的特性。結果顯示,ADC001(實例9)及對照ADC-HA具有相當的抑制乳腺癌細胞系HCC1954在體外增殖的活性,本實驗中單獨使用Herceptin是無效的;圖2所示為各組的腫瘤生長曲線。結果顯示ADC001(實例9)及對照ADC-HA表現出了相似的HCC1954移植瘤模型的腫瘤生長抑制活性;圖3圖4展示了Herceptin和ADCs(ADC002-ADC006,實例10-14)的抗癌細胞增殖的特性。結果顯示,所研究的ADCs及對照ADC-HA具有相似的抑制乳腺癌細胞系HCC1954在體外增殖的活性,本實驗中單獨使用Herceptin是無效的;圖5-圖10所示為對照ADC-HA及ADCs(ADC002-ADC006,實例10-14)作用下的腫瘤生長曲線;圖11所示為對照ADC-HA和ADCs(ADC002-ADC006)作用下的試驗終點時的腫瘤體積比較;圖12所示為Erbitux,對照ADC-EA,ADC007(實例15)和ADC008(實例16)的抗癌細胞增殖的特性;以及圖13所示為對照ADC-EA,ADC007(實例15)和ADC008(實例16)作用下的腫瘤生長曲線。
以下實施例用來更詳細地描述本發明,但本發明並不受限於此。
中間體1:(2S)-2,5-二氧代吡咯烷-1-基-2-{[7-(2,5-二氧代-2,5-二氫-1H-吡咯-1-基)-1,1,1-三氟庚-2-基]氨基}-3-甲基丁酯。
步驟1:(2S)-3-甲基-2-[(1,1,1-三氟辛-7-烯-2-基)氨基]丁-1-醇。
將6-溴-1-己烯(22.8g,140mmol)溶於40ml無水四氫呋喃溶液中。先向攪拌條件下的Mg(10.2g,420mmol)和少量催化劑碘的四氫呋喃懸濁液中加入一小部分6-溴-1-己烯的四氫呋喃溶液。反應引發後,將剩餘6-溴-1-己烯四氫呋喃溶液緩慢滴加到反應液中,並維持反應液緩慢回流。滴畢,反應液在70℃下回流反應1小時。所獲得的格式試劑(約120ml)直接用於下一步反應。
將上述格式試劑降溫至-78℃,其中滴加(4S)-4-異丙基-2-(三氟甲基)惡唑烷(17g,93.4mmol)的THF(40mL)溶液。滴畢,將反應液升溫至0℃並攪拌1.5小時。加入NH4Cl水溶液(50mL)淬滅反應,並用乙酸乙酯萃取(4x100mL)。有機層經Na2SO4乾燥後過濾,濾液濃縮。殘留物經快速柱層析純化,流動相石油醚/乙酸乙酯(0-4%),得標題化合物(11.5g,46%)為黃色油狀物。
步驟2:(2S)-3-甲基-2-[(1,1,1-三氟辛-7-烯-2-基)氨基]丁酸。
將CrO3(486mg,4.86mmol)加入到H5IO6(33.2g,145.8mmol)的無水CH3CN(100.0mL)中,室溫攪拌1小時。將反應液降至0℃,緩慢滴加(2S)-3-甲基-2-[(1,1,1-三氟辛-7-烯-2-基)氨基]-丁-1-醇(6.5g,24.3mmol,溶於20ml CH3CN),維持0℃攪拌1.5小時,然後加入K2HPO4(16.3g溶於50mL水)淬滅反應,反應液用EtOAc(3x100mL)萃取。合併有機相,有機相經食鹽水洗滌、Na2SO4乾燥後濃縮。殘留物經快速色譜柱洗脫純化,洗脫劑為石油醚/乙酸乙酯(0-4%-10%EtOAc),得標題化合物(1.04g,12.7%)為黃色油狀物。
步驟3:(2S)-3-甲基2-[(1,1,1-三氟辛-7-烯-2-基)氨基]第三丁酯。
0℃條件下,向(2S)-3-甲基-2-[(1,1,1-三氟辛-7-烯-2-基)氨基]丁酸(650mg,2.3mmol)的乙酸第三丁酯(10.0mL)溶液中,滴加70% HClO4(398mg,2.8mmol)溶液,滴畢繼續在此溫度下攪拌1小時。將反應液溫度升至室溫,並攪拌16小時,將反應液倒入EtOAc(50mL)中,相繼用水(30mL)、NaHCO3水溶液(30ml)和食鹽水洗滌,然後再經Na2SO4乾燥、過濾、濾液濃縮。殘留物經快速色譜柱洗脫純化,洗脫劑為石油醚/乙酸乙酯(0~2%~5%~10% EtOAc),得標題化合物(0.56g,72%)為無色油狀物。
步驟4:(2S)-3-甲基-2-[(1,1,1-三氟-7-羥代庚-2-基)氨基]第三丁酯。
將(2S)-3-甲基-2-[(1,1,1-三氟辛-7-烯-2-基)氨基]-第三丁酯(1.4g,4.2mmol)的無水DCM(6mL)和MeOH(6mL)溶液降至-78℃,向溶液中通O3 2分鐘。將反應液升至0℃,並加入NaBH4(481mg,12.7mmol)。反應液在此溫度下攪拌2小時。然後加入NH4Cl水溶液(4mL),淬滅反應,反應液經Na2SO4乾燥後過濾,濾液濃縮。殘留物經快速色譜柱洗脫純化,洗脫劑為石油醚/乙酸乙酯(4%~10% EA),得標題化合物(1.05g,72%)為無色油狀物。
1H NMR(CDCl3)δ 3.63(t,J=6.5Hz,2H),3.06(d,J=6.0Hz,1H),3.01(d,J=4.6Hz,1H),2.90-2.79(m,1H),1.92-1.80(m,1H),1.67-1.55(m,5H),1.44(s,8H),1.42-1.31(m,3H),0.95-0.83(m,6H)。
步驟5:(2S)-2-((7-(2,5-二氧代-2,5-二氫-1H-吡咯烷-1-基)-1,1,1-三氟庚-2-基)氨基)-3-甲基第三丁酯。
-78℃和N2保護條件下,向三苯基膦(845mg,3.2mmol)的THF(35mL)溶液中緩慢滴加DIAD(651mg,3.2mmol)。所得黃色混合液在-78℃下攪拌5分鐘,然後加入(2S)-3-甲基-2-[(1,1,1-三氟-7-羥基庚-2-基)氨基]第三丁酯(1.1g,3.22mmol)的THF(5mL)溶液。再攪拌5分鐘後,向反應液中加入新戊醇(142mg,1.61mmol)和1H-吡咯-2,5-二酮(313mg,3.22mmol)固體。反應液室溫攪拌過夜後濃縮。殘留物經快速色譜柱洗脫純化,洗脫劑為石油醚/乙酸乙酯(0~15% EtOAc),得標題化合物(550mg,40.7%)為無色油狀物。
1H NMR(CDCl3)δ 6.69(s,2 H),3.52(t,J=7.2Hz,2 H),3.06-3.01(m,1 H),2.84-2.82(m,1 H),1.89-1.87(m,1 H),1.66-1.52(m,8 H),1.50-1.25(m,9 H),0.95-0.86(m,6 H)。
步驟6:(2S)-2,5-二氧代吡咯烷-1-基-2-{[7-(2,5-二氧代-2,5-二氫-1H-吡咯-1-基)-1,1,1-三氟-庚-2-基]氨基}-3-甲基第三丁酯。
在0℃和N2保護下向2-((7-(2,5-二氧代-2,5-二氫-1H-吡咯-1-基)-1,1,1-三氟庚-2-基)氨基)-3-甲基第三丁酯(350mg,0.84mmol)的無水DCM(6mL)溶液中滴加TFA(6mL)。所得混合液在室溫條件下攪拌2小時,然後濃縮,並用甲苯(2 x 10mL)帶除TFA。在0℃和N2保護下將殘留物溶解到無水THF(5mL)中,依次加入DCC(171mg,0.83mmol)和三乙胺(251mg,2.492mmol)。室溫攪拌5分鐘後,加入N-羥基琥珀醯亞胺(96mg,0.83mmol)。將反應液在室溫條件下攪拌16小時,過濾後濃縮的標題化合物粗品(260mg),不經純化直接用於下一步反應。
中間體2和中間體3:(S)-2-(((R)-7-(2,5-二氧代-2,5-二氫-1氫-吡咯-1-基)-1,1,1-三氟庚烷-2-基)氨基)-3-甲基-丁酸,(R)-MTMH-纈氨酸和
(S)-2-(((S)-7-(2,5-二氧代-2,5-二氫-1氫-吡咯-1-基)-1,1,1-三氟庚烷-2-基)氨基)-3-甲基-丁酸,(S)-MTMH-纈氨酸。
步驟1:(4S)-4-異丙基2-(三氟甲基)惡唑烷。
室溫氮氣保護下,一次性地往(S)-2-胺-3-異戊烷-1-醇(85克,824毫莫耳,1.0當量)和2,2,2-三氟-1-甲氧基-乙醇(75克,577毫莫耳,0.7當量)的甲苯溶液(1.5升)中加入對甲苯磺酸吡啶(10.4克,41.2毫莫耳,0.05當量)。混合物回流3小時,用分水器分出甲醇和水。薄層色譜檢測反應完成,反應物冷卻到室溫,過濾,濾液濃縮得到86克黃色油狀標題粗產物。
步驟2:(2S)-3-甲基-2-[(1,1,1-三氟甲基-7-烯-2-基)氨基]正丁醇。
20℃氮氣保護下,往含有鎂粉(18.2克,450毫莫耳,1.5當量)和催化量碘的四氫呋喃(500毫升)混合物中,緩慢滴加6-溴-1-己烯(81.5克,499.8毫莫耳,1.0當量)的四氫呋喃(500毫升)溶液,滴加時間超過30分鐘。滴加過程中,反應溫度升高至60℃。繼續在60℃攪拌反應1.5小時後,反應液冷卻至室溫,不經過純化直接用作下一步反應。
在-78℃氮氣保護下,往上述格式試劑5-己烯溴化鎂(0.5莫耳每升,500毫升,1.25當量)中滴加(4S)-4-異丙基-2-三氟甲基惡唑烷(36.6克,200毫莫耳,1.00當量)的四氫呋喃(300毫升)溶液。反應液在零下78℃攪拌30分鐘後,升溫至20℃,繼續攪拌4.5小時。薄層色譜檢測(石油醚:乙酸
乙酯=5:1)檢測反應完成。混合物用飽和氯化銨溶液(500毫升)淬滅,乙酸乙酯(1000毫升x 3)萃取。合併的有機相用飽和食鹽水(500mL x 2)洗滌,無水硫酸鈉乾燥,過濾,濃縮。殘物用矽膠柱層析(石油醚:乙酸乙酯=20:1)純化得到黃色油狀標題產物19克(收率35.5%)。
步驟3:(2S)-3-甲基-2-[(1,1,1-三氟甲基-7-烯-2-基)]正丁酸。
0℃下,往(2S)-3-甲基-2-[(1,1,1-三氟甲基-7-烯-2-基)氨基]正丁醇(19克,71毫莫耳,1.0當量)的乙腈(515毫升)的混合物中依次加入高碘酸(48.6克213.2毫莫耳,3當量),三氧化鉻(142毫克,1.4毫莫耳,0.02當量)和水。混合物在0℃下攪拌4小時。薄層色譜檢測反應完成。混合物減壓濃縮至幹,殘餘物用矽膠柱層析(石油醚:乙酸乙酯=10:1)得到黃色油狀標題化合物(16克,收率80%)。
步驟4:(2S)-第三丁基3-甲基-2-[(1,1,1-三氟甲基-7-烯-2-y基)氨基]丁酸酯。
在30℃氮氣保護下,往(2S)-3-甲基-2-[(1,1,1-三氟甲基-7-烯-2-基)氨基]正丁酸(7克,24.9毫莫耳,1.0當量)的乙酸第三丁酯(200毫升)的溶液中一次性加入70%的高氯酸(7.5克,74.7毫莫耳,3當量)。混合物在30℃下攪拌3小時。薄層色譜檢測反應完畢。混合物用400毫升乙酸乙酯稀釋,400毫升水洗滌。有機相用無水硫酸鈉乾燥,濃縮。殘餘物用矽膠柱層析純化(石油醚:乙酸乙酯=60:1)得到黃色油狀標題化合物(7克,收率83.4%)。
步驟5:(2S)-第三丁基3-甲基-2-[(1,1,1-三氟甲基-7-羥基庚烷-2-基)氨基]丁酸酯。
零下78℃下,往(2S)-第三丁基3-甲基-2-[(1,1,1-三氟甲基-7-烯-2-y基)氨基]丁酸酯(14.0克,41.5毫莫耳,1當量)的二氯甲烷(100毫升)和甲醇(100毫升)混合溶液中通臭氧3分鐘。用氮氣把多餘的臭氧清除後,硼氫化鈉(4.7克,124.5毫莫耳,3當量)加入到上述反應液中。反應液在20℃攪拌3小時。薄層色譜顯色原料反應完畢。混合物在用飽和氯化銨溶液(50毫升)淬滅後,用乙酸乙酯(200毫升)萃取。有機相濃縮後得到粗品,粗品用矽膠柱層析純化(石油醚:乙酸乙酯=20:1)得到黃色油狀標題化合物(11克,收率:77.7%)。
步驟6:(2S)-第三丁基2-((7-(2,5-二氧代-2,5-二氫-1氫-吡咯烷-1-基)-1,1,1-三氟庚烷-2-基)氨基)-3-甲基丁酸酯。
零下78℃氮氣保護下,往三苯基膦(4.61克,17.57毫莫耳,1.50當量)的四氫呋喃(40毫升)溶液中滴加偶氮二甲酸二異丙酯(3.55克,17.57毫莫耳,1.50當量)。在零下78℃下攪拌5分鐘後,滴加(2S)-第三丁基3-甲基-2-[(1,1,1-三氟甲基-7-羥基庚烷-2-基)氨基]丁酸酯(4.0克,11.7毫莫耳,1當量)的四氫呋喃(5毫升)溶液到上述反應液中。攪拌5分鐘後,依次將特戊醇(774.6毫克,8.8毫莫耳,0.75當量)和1氫-吡咯烷-2,5-二酮(1.7克,17.6毫莫耳,1.5當量)加入到上述反應液中。反應液在30℃攪拌3小時。薄層色譜檢測反應完畢,把反應液濃縮至幹,殘餘物矽膠柱層析純化(石油醚:乙酸乙酯=10:1)得到白色固體標題化合物(4.0克,9.51毫莫耳,收率:81.17%)。
步驟7:(S)-2-(((R)-7-(2,5-二氧代-2,5-二氫-1氫-吡咯-1-基)-1,1,1-三氟庚烷-2-基)氨基)-3-甲基-丁酸,(R)-MTMH-纈氨酸和(S)-2-(((S)-7-(2,5-二氧
代-2,5-二氫-1氫-吡咯-1-基)-1,1,1-三氟庚烷-2-基)氨基)-3-甲基-丁酸,(S)-MTMH-纈氨酸。
30℃下,將(2S)-第三丁基2-((7-(2,5-二氧代-2,5-二氫-1氫-吡咯烷-1-基)-1,1,1-三氟庚烷-2-基)氨基)-3-甲基丁酸酯(6.0克,14.3毫莫耳,1當量)的二氯甲烷(40毫升)溶液和三氟乙酸(40毫升)的混合物攪拌12小時。反應液濃縮至幹,殘餘物用製備高效液相色譜純化(儀器:Shimadzu pump LC-20A;柱子:SYNERGI 200*50 10um;流動相:A for H2O(Add 0.75‰ TFA,v/v)and B for CH3CN梯度:B 30-60%;梯度時間:30min;保留時間:25-30min;流速:80mL/min)得到組分1:白色固體中間體2(3.20克,8.78毫莫耳,收率61.55%)和組分2:黃色油狀中間體3(1.10克,3.02毫莫耳,收率21.16%)。
中間體2,(R)-MTMH-纈氨酸:1H NMR(CDCl3)δ 6.72(s,2H),3.54(t,2H),3.30(d,1H),3.00(m,1H),2.13(m,1H),1.75-1.25(m,8H),1.03(d,3H),0.98(d,3H).LCMS:365.1(MH+)。
中間體3,(S)-MTMH-纈氨酸:1H NMR(CDCl3)δ 6.72(s,2H),3.54(t,2H),3.33(d,2H),2.97(m,1H),2.02(m,1H),1.75-1.25(m,8H),1.03(d,3H),0.99(d,3H).LCMS:365.1(MH+)。
中間體4:Cit-PAB-OH。
步驟1:Fmoc-Cit。
0℃氮氣保護下,將Fmoc-Cl(35.40克,136.84毫摩爾,1.20當量)的1,4-二氧六環(100毫升)溶液滴加到L-瓜氨酸(20.00克,114.16毫莫耳,1.00當量)的10%碳酸鈉(200毫升)溶液中。滴加時間至少需要5分鐘。反應液升溫至20℃,攪拌4小時。薄層色譜檢測反應完畢。反應液中加入水(50毫升),水相用2M的鹽酸(50毫升)調節pH值到2-3,然後水相用乙酸乙酯(150毫升X3)萃取,合併的有機相用飽和食鹽水洗滌(100毫升X2),用無水硫酸鈉乾燥,過濾,濃縮得到白色標題化合物固體(40.00克,100.65毫莫耳,收率88.17%).LCMS(ESI):398.1(MH+)。
步驟2:Fmoc-Cit-PAB-OH。
20℃氮氣保護下用30分鐘,將EEDQ(49.78克,201.30毫摩爾,2.0當量)的甲醇(500mL)溶液滴加到Fmoc-cit(40.00克,100.65毫莫耳,1.00當量)和4-氨基苄醇(14.87克,120.78毫摩爾,1.2當量)的二氯甲烷(1000毫升)溶液中,滴加時間至少需要30分鐘。反應液在20℃攪拌16小時。薄層色譜(甲醇:乙酸乙酯=1:10)顯示原料反應完全。反應液濃縮,殘餘物用第三丁基甲醚(200毫升X3)洗滌,過濾,收集固體乾燥得到白色標題化合物固體(45.00克,89.54毫莫耳,收率:88.96%)。
步驟3:Cit-PAB-OH。
20℃下,用10分鐘,將呱啶(21.93克,257.58毫莫耳,8.63當量)的N,N-二甲基甲醯胺(20毫升)溶液滴加到Fmoc-cit-PAB-OH(15.00克,29.85毫莫耳,1.00當量)的N,N-二甲基甲醯胺(124.5毫升)溶液中,滴加時間至少需要10分鐘。反應液在20℃攪拌3小時,薄層色譜(二氯甲烷:甲醇=5:1)檢測反應完畢。反應液用N,N-二甲基甲醯胺(30毫升X2)洗滌。反應液濃縮至幹,殘餘物用製備高效液相色譜(甲酸體系)純化得到白色標題化合物固體(7.50克,26.76毫莫耳,收率89.63%)。LCMS(ESI):218.1(MH+)。
中間體5:(S)-2-氨基-N-(4-(羥甲基)苯基)-5-嗎啡啉戊醯胺。
步驟1:(S)-甲基2-(((苄氧基)羰基)氨基)-5-嗎啡啉-5-氧代戊酸酯。
往Z-Glu-OMe(10克,33.87毫莫耳)的無水N,N-二甲基甲醯胺(100毫升)溶液中加入二異丙基乙基胺(13.13克,101.60毫莫耳),HATU(15.45克,40.64毫莫耳)和嗎啡啉(4.43克,50.8毫莫耳)。混合物在20℃攪拌16小時後,倒入200毫升水和500毫升乙酸乙酯的混合液中。有機相用水(100毫升X2),飽和食鹽水(100毫升)洗滌,用無水硫酸鈉乾燥,過濾,濃縮後得到油狀標題化合物(11克)粗品。MS:365(MH+)。
步驟2:(S)-甲基2-(((苄氧基)羰基)氨基)-5-嗎啡啉戊酸酯。
0℃下,往(S)-甲基-2-(((苄氧基)羰基)氨基)-5-嗎啡啉-5-氧代戊酸酯(3克,2毫莫耳)的無水四氫呋喃(40毫升)溶液中加入10莫耳每升的硼烷二甲硫醚的四氫呋喃溶液(4毫升),混合物升溫至16℃並攪拌16小時。反應依次用甲醇和40毫升1莫耳每升的鹽酸淬滅,混合物在90℃攪拌30分鐘後減壓蒸除溶劑,殘餘物溶在100毫升水中,用氫氧化鈉溶液調節pH值到10,乙酸乙酯(100mLX3)萃取,合併有機相用無水硫酸鈉乾燥,過濾,減壓濃縮。殘餘物用柱層析(二氯甲烷:甲醇=10:1)純化得到油狀標題化合物(5.5克,收率47.7%)。MS:351(MH+)。
步驟3:(S)-2-(((苄氧基)羰基)氨基)-5-嗎啡啉戊酸。
0℃下,一水合氫氧化鋰(1.32克,31.39毫莫耳)加入到(S)-甲基-(((苄氧基)羰基)氨基)-5-嗎啡啉戊酸酯(5.5克,15.70毫莫耳)的四氫呋喃(50毫升)溶液中。在0℃攪拌2小時後減壓蒸除溶劑得到標題化合物粗品(5克)。
步驟4:(S)-苄基(1-((4-(羥甲基)苯基)氨基)-5-嗎啡啉-1-戊烷-2-基)氨基甲酸酯。
往(S)-2-(((苄氧基)羰基)氨基)-5-嗎啡啉戊酸(3.0克,8.92毫莫耳)的無水N,N-二甲基甲醯胺(200毫升)溶液中依次加入HOBt(1.21克,8.92毫莫耳),EDCI(1.71克,8.92毫莫耳)和4-氨基苄醇(1.65克,13.38毫莫耳),混合物在0℃下攪拌6小時後,傾倒入100毫升水和150毫升乙酸乙酯的混合溶劑中。有機相依次用水(50毫升X2),飽和食鹽水(50毫升)洗滌,無水硫酸鈉乾燥,減壓濃縮。殘餘物用柱層析(二氯甲烷:甲醇=10:1)純化得到標題產物(1.2克,收率30.47)。MS:442(MH+)。
步驟5:(S)-2-氨基-N-(4-(羥甲基)苯基)-5-嗎啡啉戊醯胺。
氮氣保護下,往(S)-苄基(1-((4-(羥甲基)苯基)氨基)-5-嗎啡啉-1-戊烷-2-基)氨基甲酸酯(600毫克,1.36毫莫耳)的甲醇(50毫升)溶液中加入鈀碳(200毫克)。懸浮物用真空抽氣,氫氣置換3次。反應液在25℃,15psi的氫氣壓力下攪拌反應0.5小時。矽藻土過濾,濾液濃縮得到標題化合物粗品(350毫克)。MS:308(MH+)。
中間體6:第三-丁基((反式-4-(2-氨基-3-((4-(羥甲基)苯基)氨基)-3-丙醯基)環己基)甲基)氨基甲酸酯。
步驟1:反式-4-(((第三-第三丁基羰基)氨基)甲基)環己基羧酸。
15℃,往反式-4-(氨甲基)環己基羧酸(50克,318毫莫耳)和Boc2O(69.4克,318毫摩爾)混合物的水(500毫升)溶液中滴加入氫氧化鈉(12.7克,318毫摩爾)的水(500毫升)溶液。反應液在15℃攪拌16小時,薄層色譜檢測反應完畢。反應液用乙酸(40毫升)調節pH到3,乙酸乙酯萃取(400毫升X3)。合併的有機相用無水硫酸鈉乾燥,過濾,濃縮後得到白色標題化合物粗品固體(77克)。
1H NMR(CDCl3)δ 4.62(m,1H),2.98(m,2H),2.25(m,1H),2.04(d,2H),1.83(d,2H),1.438-1.37(m,12H),0.96(m,2H)。
步驟2:第三-丁基((反式-4-(羥甲基)環己基)甲基)氨基甲酸酯。
0℃氮氣保護下,往反式-4-(((第三-第三丁基羰基)氨基)甲基)環己基羧酸(37.0克,143.8毫莫耳)的四氫呋喃溶液(1升)中分批加入四氫鋁鋰(8.2克,215.7毫莫耳)。混合物15℃下攪拌16小時後,薄層色譜檢測反應完成。反應液依次用水(8.2毫升),15%氫氧化鈉水溶液(8.2毫升),水(24.6毫升)淬滅,過濾。濾液濃縮幹,殘餘用矽膠柱過柱(石油醚:乙酸乙酯=2:1)得到白色標題化合物固體(19.0克,收率:54.5%)。
1H NMR(CDCl3)δ 4.61(br s,1H),3.45(d,2H),2.98(t,2H),1.81(m,4H),1.44(m,11H),0.95(m,4H)。
步驟3:第三-丁基((反式-4-甲醯環己基)甲基)氨基甲酸酯。
零下65℃氮氣保護下,往草醯氯(11.9克,93.7毫莫耳)的二氯甲烷(375毫升)溶液中滴加入二甲亞碸(11.0克,140.5毫莫耳)的二氯甲
烷(675毫升)溶液。反應液在零下65度反應30分鐘後,緩慢加入第三-丁基((反式-4-(羥甲基)環己基)甲基)氨基甲酸酯(19.00克,78.08毫莫耳)的二氯甲烷(150毫升)溶液,混合物在零下65度下繼續攪拌30分鐘。薄層色譜檢測原料反應完畢,滴加入三乙胺(19.4克,191.3毫莫耳)的二氯甲烷(75毫升)溶液,繼續在零下65℃攪拌30分鐘。反應液升溫到20℃,用飽和氯化銨溶液(150毫升)淬滅,二氯甲烷(300毫升X3)萃取。合併有機相,無水硫酸鈉乾燥,過濾,濃縮得到黃色油狀標題化合物粗品(19克)。
步驟4:甲基2-(((苄氧基)羰基)氨基)-3-(反式-4-(((第三-丁氧羰基)氨基)甲基)環己基)丙烯酸酯。
20℃氮氣保護下,往第三-丁基((反式-4-甲醯環己基)甲基)氨基甲酸酯(19.0克,78.7毫莫耳)和甲基2-(((苄氧基)羰基)氨基)-2-(二甲基氧磷醯基)乙酸酯(28.7克,86.6毫摩爾)的二氯甲烷(600毫升)溶液中一次性加入DBU(18.0克,118.1毫摩爾),反應液在20℃攪拌2小時。薄層色譜檢測反應完畢。反應液用飽和碳酸氫鈉溶液(300毫升X2)洗滌。有機相濃縮,殘餘物用矽膠柱層析純化(石油醚:乙酸乙酯=3:1)得到無色透明油狀標題化合物(20克,收率:56.9%)。
1H NMR(CDCl3)δ 7.35(m,5H),6.45(d,1H),6.08(br s,1H),5.15(s,2H),4.60(br s,1H),3.74(s,3H),2.97(m,2H),2.32(m,1H),1.77(m,4H),1.45(s,9H),1.12(m,2H),0.95(m,3H)。
步驟5:2-(((苄氧基)羰基)氨基)-3-(反式-4-(((第三-丁氧羰基)氨基)甲基)環己基)丙烯酸。
25℃下,往甲基2-(((苄氧基)羰基)氨基)-3-(反式-4-(((第三-丁氧羰基)氨基)甲基)環己基)丙烯酸酯(20.0克,44.8毫莫耳)的甲醇(150毫升)溶液中加入一水合氫氧化鋰(5.6克,134.4毫莫耳)的水(50毫升)溶液。混合物在25℃攪拌16小時。薄層色譜檢測反應完成,用乙酸調節pH到3,濃縮蒸出溶劑甲醇。水相用乙酸乙酯(50毫升X3)萃取,合併的有機相用無水硫酸鈉乾燥,過濾,濃縮得到無色透明標題化合物(18.00克)。
步驟6:苄基(1-(反式-4-(((第三-丁氧羰基)氨基)甲基)環己基)-3-((4-(羥基甲基)苯基)氨基)-3-氧丙基-1-烯-2-基)氨基甲酸酯。
25℃氮氣保護下,2-(((苄氧基)羰基)氨基)-3-(反式-4-(((第三-丁氧羰基)氨基)甲基)環己基)丙烯酸(18克,41.6毫莫耳),4-氨基苄醇(7.7克,62.4毫莫耳),HATU(23.7克,62.4毫莫耳)和二異丙基乙基胺(16.1克,124.9毫克)的N,N-二甲基甲醯胺(600毫升)混合物攪拌16小時。薄層色譜檢測反應完成。反應液用乙酸乙酯(600毫升)稀釋,用飽和氯化銨溶液(600毫升X3)洗滌。有機相分離,用無水硫酸鈉乾燥,過濾,濃縮。殘餘物用矽膠柱層析(石油醚:乙酸乙酯=1:1)得到褐色標題化合物固體(14.00克,26.04毫莫耳,收率:62.56%)。MS:538(MH+)。
步驟7:第三-丁基((反式-4-(2-氨基-3-((4-(羥甲基)苯基)氨基)-3-氧丙基)環己基)甲基)氨基甲酸酯。
氮氣保護下,往苄基(1-(反式-4-(((第三-丁氧羰基)氨基)甲基)環己基)-3-((4-(羥基甲基)苯基)氨基)-3-氧丙基-1-烯-2-基)氨基甲酸酯(7.0克,13.0毫莫耳)的甲醇(100毫升)溶液中加入10%的鈀碳(1.0克)。懸浮液用真空抽氣,氫氣置換3次,混合物在25℃下攪拌氫化20分鐘(15psi)。薄層色譜檢測反應完畢,過濾,濾液濃縮。殘物用製備高效液相色譜純化得到白色標題化合物固體(1.4克,收率:26.3%)。MS:406(MH+)。
中間體7:Cit-ABA-PAB-OH。
步驟1:4-((((9H-芴-9-基)甲氧基)羰基)氨基)丁酸。
0℃氮氣保護下,往4-氨基丁酸(5.0克,48.5毫摩爾,1當量)的10%碳酸鈉(16.5克,155.7毫摩爾,3.2當量,150毫升水)水溶液中滴加芴甲氧羰醯氯(13.8克,53.3毫摩爾,1.1當量)的1,4-二氧六環(100毫升)溶液,滴加時間至少10分鐘。混合物在20℃攪拌4小時後,薄層色譜檢測反應完畢。反應液用2M的鹽酸溶液調節pH到2-3,用乙酸乙酯(250毫升x3)萃取,合併有機相,飽和食鹽水洗滌(150毫升X2),無水硫酸鈉乾燥,過濾真空濃縮得到白色標題化合物固體(16克)。LCMS:326.1(MH+)。
步驟2:(9H-芴-9-基)甲基(4-((4-(羥甲基)苯基)氨基)-4-氧丙基)氨基甲酸酯。
20℃下,往4-((((9H-芴-9-基)甲氧基)羰基)氨基)丁酸(16.0克,49毫莫耳,1當量)的N,N-二甲基甲醯胺(200毫升)溶液中依次加入HATU(20.
6克,51.1毫摩爾,1.1當量)和二異丙基乙基胺(19.1克,147.5毫摩爾,3當量),攪拌30分鐘後,4-氨基苄醇(7.3克,59.0毫摩爾,1.2當量)一次性地加入到該反應液中,混合物繼續在20℃下攪拌反應16小時。薄層色譜檢測反應結束。反應液真空濃縮至幹,殘餘物用第三丁基甲醚(600毫升X3)洗滌,過濾,濾液濃縮得黃色標題化合物粗品(15克)。LCMS:431.2(MH+)。
步驟3:4-氨基-N-(4-(羥甲基)苯基)丁醯胺。
20℃下,往(9H-芴-9-基)甲基(4-((4-(羥甲基)苯基)氨基)-4-氧丙基)氨基甲酸酯(5.0克,11.6毫莫耳,1當量)的N,N-二甲基甲醯胺(40毫升)溶液中一次性加入呱啶(7.9克,92.9毫莫耳,8當量)。混合物在20℃下攪拌3小時。薄層色譜(二氯甲烷:甲醇=5:1)檢測反應結束。反應液濃縮即得黃色標題化合物粗品固體(5克)。LCMS:209.1(MH+)。
步驟4:Fmoc-Cit-ABA-PAB-OH。
20℃下,往4-氨基-N-(4-(羥甲基)苯基)丁醯胺(600毫克,2.9毫摩爾,1當量)和Fmoc-cit(1.3克,3.2毫摩爾,1.1當量)的二氯甲烷(8毫升)溶液中緩慢滴加EEDQ(1.4克5.8毫摩爾,2當量)的甲醇(8毫升)溶液。反應液在20℃下攪拌16小時,薄層色譜(二氯甲烷:甲醇=5:1)檢測反應結束。反應液濃縮,殘餘物用製備薄層色譜(二氯甲烷:甲醇=5:1)純化得到白色標題化合物固體(440毫克,收率:26%)。LCMS:588.3(MH+)。
步驟5:Cit-ABA-PAB-OH。
20℃下,往Fmoc-Cit-ABA-PAB-OH(440毫克,745微莫耳,1當量)的N,N-二甲基甲醯胺(10毫升)溶液中一次性加入呱啶(510毫克,6毫莫耳,8當量)。反應物在20℃下攪拌3小時。薄層色譜(二氯甲烷:甲醇=5:1)檢測反應結束。反應液減壓濃縮,殘餘物用製備薄層色譜(二氯甲烷:甲醇=5:1)純化得到白色標題化合物粗品固體(320毫克)。LCMS:366.2(MH+)。
實施例1:MTMH-Val-Cit-PABO(CO)-MMAE。
步驟1:MTMH-Val-Cit-PAB-OH。
氮氣保護下,往(2S)-2,5-二氧代吡咯烷-1-基-2-{[7-(2,5-二氧代-2,5-二氫-1H-吡咯-1-基)-1,1,1-三氟庚-2-基]氨基}-3-甲基丁酯(中間體1)(0.56毫摩爾)的N,N-二甲基甲醯胺(5毫升)溶液中加入Cit-PAB-OH(中間體4)(0.56毫摩爾),混合物在室溫下攪拌16小時。反應完畢後減壓蒸除溶劑,粘稠的油狀殘物用第三丁基甲醚(10毫升X2)洗滌得到標題化合物粗品,不進行純化直接用作下一步反應。LCMS(ESI):627.3(MH+)。
步驟2:MTMH-纈氨酸-Cit-PAB(4-硝基苯基)碳酸酯。
往MTMH-Val-Cit-PAB-OH(260毫克粗品,0.56毫莫耳)的N,N-二甲基甲醯胺(3毫升)溶液中加入二(4-硝基苯基)碳酸酯(340毫克,1.12毫摩爾)和二異丙基乙基胺(108毫克,0.84毫摩爾)。反應液在室溫攪拌1小時後濃縮幹。殘餘物用第三丁基甲醚(10毫升X2)洗滌得到標題化合物,不經過純化直接用作下一步反應。LCMS(ESI):792.3(MH+)。
步驟3:MTMH-Val-Cit-PABO(CO)-MMAE。
往MMAE(0.28毫莫耳)和MTMH-纈氨酸-Cit-PAB(4-硝基苯基)碳酸酯(0.56毫摩爾)的無水N,N-二甲基甲醯胺(2.5毫升)溶液中加入HOBt(23毫克,0.17毫摩爾,混合物室溫攪拌2分鐘後,加入0.5毫升吡啶,繼續室溫攪拌反應16小時後,減壓蒸除溶劑。殘餘物用製備高效液相色譜純化得到白色標題化合物固體(40毫克,收率:10.4%)。LCMS(ESI):=685.9[(M/2)H+]。
實施例2:(S)-MTMH-Val-Cit-PABO(CO)-MMAE。
步驟1:(S)-MTMH-Val-Cit-PAB-OH。
30℃下,(S)-MTMH-纈氨酸(中間體3)(300毫克,823微摩爾,1當量),HOBt(133.5毫克,988微莫耳,1.20當量),EDCI(189毫克,988微莫耳,1.20當量),DIPEA(426毫克,3.3毫莫耳,4當量)和Cit-PAB-OH(INTERME DIATE 4)(277毫克,988微莫耳,1.20當量)的N,N-二甲基甲醯胺(10毫升)混合物攪拌6小時。薄層色譜檢測反應完成。減壓蒸除溶劑,殘餘物用製備薄層色譜(二氯甲烷:甲醇=10:1)純化得到白色標題化合物粗品固體(410毫克,收率52.3%)。LCMS(ESI):627.3(MH+)。
步驟2:(S)-MTMH-Val-Cit-PAB(4-nitrophenyl)carbonate。
25℃氮氣保護下,往(S)-MTMH-Val-Cit-PAB-OH(250毫克5,399微莫耳,1當量)的N,N-二甲基甲醯胺(10毫升)溶液中依次一次性加入二異丙基乙基胺(77毫克,598微摩爾,1.5當量)和二(4-硝基苯基)碳酸酯(243毫克,798微摩爾,2.0當量)。反應液在25℃攪拌15小時。LCMS檢測反應完畢後,真空濃縮反應液。殘餘物用製備薄層色譜(乙酸乙酯)純化得到白色標題化合物粗品固體(185毫克,收率58.6%)。LCMS(ESI):792.3(MH+)。
步驟3:(S)-MTMH-Val-Cit-PABO(CO)-MMAE。
25℃氮氣保護下,往MMAE(200毫克,279微莫耳,1當量)和(S)-MTMH-纈氨酸-Cit-PAB(4-硝基苯基)碳酸酯(250毫克,316微摩爾,1.13當量)的無水N,N-二甲基甲醯胺(10毫升)溶液中依次一次性加入HOBt(25毫克,185微摩爾,066當量)和吡啶(980毫克,12.4毫摩爾,44.5當量).反應液在25℃攪拌反應15小時後,LCMS檢測反應完畢。反應液用乙酸乙酯(200毫升)稀釋,水(150毫升X3)洗滌,濃縮有機相。殘餘物用製備高效液相色譜(甲酸體系)純化得到白色標題化合物固體(109毫,收率30%)。LCMS(ESI):686[(M/2)H+]。
實施3:(R)-MTMH-Val-Cit-PABO(CO)-MMAE。
標題化合物的製備方法相似於先前描述的(S)-MTMH-Val-Cit-PABO(CO)-MMAE(實施2),從(R)-MTMH-纈氨酸(中間體2)和Cit-PAB-OH(中間體4)經過3步反應制得。LCMS(ESI):686.1[(M/2)H+]。
實施4:(R)-MTMH-DP1-PABO(CO)-MMAE。
步驟1:(R)-MTMH-DP1-PAB-OH。
氮氣保護下,往(S)-MTMH-纈氨酸(中間體2)(350毫克,0.96毫莫耳)的N,N-二甲基甲醯胺(15毫升)溶液中依次加入HOBt(155.75毫克,1.15毫摩爾),EDCI(220.97毫克,1.15毫摩爾),二異丙基乙基胺(496.59毫克,3.84毫摩爾)和(S)-2-氨基-N-(4-(羥甲基)苯基)-5-嗎啡啉戊醯胺(中間體5)(390毫克,1.1毫莫耳).混合物25℃攪拌反應6小時後濃縮至幹。殘餘物用柱層析層析純化(乙酸乙酯:甲醇=10:1)得到標題化合物(400毫克,收率:63.7%)。MS:654(MH+)。
步驟2:(R)-MTMH-DP1-PAB(4-nitrophenyl)carbonate。
氮氣保護下,往(R)-MTMH-Val-Cit-PAB-OH的N,N-二甲基甲醯胺(10毫升)溶液中加入二異丙基乙基胺(77.1毫克,597微摩爾)和二(4-硝基苯基)碳酸酯(349毫克,1.15毫摩爾)。反應液在25℃攪拌16小時後濃縮至幹。殘餘物用製備薄層色譜(乙酸乙酯)純化得到標題化合物(300毫克,收率79.84%)。MS:819(MH+)。
步驟3:(R)-MTMH-DP1-PABO(CO)-MMAE。
氮氣保護下,往(R)-MTMH-DP1-PAB(4-硝基苯基)碳酸酯(200毫克,0.244毫莫耳)的N,N-二甲基甲醯胺(4毫升)溶液中依次一次性地加入MM
AE(200毫克,0.278毫莫耳)和HOBt(10毫克,0.074毫摩爾)和吡啶(0.8毫升)。反應液在25℃攪拌反應16小時後用乙酸乙酯(50毫升)稀釋,用水(20毫升X2),飽和食鹽水(20毫升)洗滌,濃縮有機相。殘餘物用製備高效液相色譜(甲酸體系)純化得到白色標題化合物固體(160毫克,收率46.87%)。LCMS(ESI):699.5[(M/2)H+]。
實施例5:(R)-MTMH-DP2-PABO(CO)-MMAE。
目標化合物的製備相似於(R)-MTMH-DP1-PAB(CO)-MMAE(實施4),但是用中間體5的嗎啡啉基團用呱啶來取代以得到相對應的中間體。LCMS(ESI):698.6[(M/2)H+]。
實施6:(R)-MTMH-DP3-PABO(CO)-MMAE。
步驟1:(R)-MTMH-Boc-DP3-PAB-OH。
25℃氮氣保護下,往(S)-MTMH-纈氨酸(中間體2)(225.0毫克,617.5微莫耳)的N,N-二甲基甲醯胺(12毫升)溶液中加入HOBt(108.5毫克,802.8微摩爾),EDCI(153.9毫克,802.8微摩爾)和二異丙基乙基胺(239.4毫克,1.9毫摩爾)。反應液攪拌反應5分鐘後,第三-丁基((反式-4-(2-氨基-3-((4-(羥甲基)苯基)氨基)-3-氧丙基)環己基)甲基)氨基甲酸酯(中間體6)(300.5毫克,741微摩爾)加入到上述反應液中,反應液繼續在25℃攪拌反應4小時。薄
層色譜檢測大部分原料反應完畢。反應液用乙酸乙酯(20毫升)稀釋,飽和氯化銨溶液(30毫升X3)洗滌,濃縮有機相。殘餘物用製備薄層色譜純化,再用手性色譜柱分離得到白色標題化合物固體(組分1:140毫克,收率30%)。
步驟2:(R)-MTMH-Boc-DP3-PABO(CO)-MMAE。
標題化合物的製備類似於先前描述的(S)-MTMH-Val-Cit-PABO(CO)-MMAE(實施2),從第二步到第三步用的是(R)-MTMH-Boc-DP3-PAB-OH.LCMS[((M-100)/2)H+]:698.5。
步驟3:(R)-MTMH-DP3-PAB-MMAE。
25℃下,往(R)-MTMH-Boc-DP3-PABO(CO)-MMAE(200.00毫克,133.70微莫耳)的乙腈(4.25mL)和水(0.25毫升)溶液中一次性地加入三氟乙酸(0.5毫升)。反應液在25-29℃攪拌反應16小時。LCMS檢測反應完成。反應液減壓濃縮幹,殘餘物用製備高效液相色譜純化,製備得到的的溶液不濃縮,直接凍幹得到白色標題化合物固體(105毫克,收率:56.3%)。LCMS:698.7[(M/2)H+]。
實施7:(S)-MTMH-Val-Cit-PABO(CO)-ABA-MMAE。
步驟1:(S)-MTMH-Val-Cit-PABO(CO)-ABA。
20℃氮氣保護下,往(S)-MTMH-Val-Cit-PAB(4-硝基苯基)碳酸酯(420毫克,531微莫耳,1當量)和4-氨基丁酸(109毫克,1.1毫莫耳,2當量)的N,N-二甲基甲醯胺(8毫升)溶液中一次性地加入二異丙基乙基胺(205毫克,1.6毫莫耳,3當量)。反應液在20℃攪拌反應12小時後,薄層色譜(二氯甲烷:甲醇=10:1)檢測反應完畢。反應液用乙酸乙酯(50毫升)稀釋後用水(50毫升)洗滌,有機相減壓濃縮至幹,殘餘物用製備薄層色譜純化(二氯甲烷:甲醇=10:1)得到白色標題化合物固體(236毫克,收率:46.47%,純度大約79%).MS:756.3(MH+)。
步驟2:(S)-MTMH-Val-Cit-PABO(CO)-ABA-MMAE。
10℃氮氣保護下,往(S)-MTMH-Val-Cit-PABO(CO)-ABA(50毫克,66微莫耳,1當量)和二異丙基乙基胺(26毫克,198微莫耳,3當量)的N,N-二甲基甲醯胺(3毫升)溶液中一次性地加入HATU(30毫克,79微莫耳,1.2當量)。反應液在10℃攪拌30分鐘後加入MMAE(47.5毫克,66微莫耳,1當量),繼續在25℃攪拌反應12小時。LCMS檢測反應完成,反應液濃縮幹。
殘餘物用製備高效液相色譜純化(柱子,PhenomenexSynergiC18150*25*10um;條件,0.225%FA-CAN;B相開始濃度,45;B相結束濃度,75;梯度時間(min),10;100%B保持時間(min),2;流速(毫升/分),25)得到白色標題化合物固體(25毫克,收率:26%)。LCMS:728.7[(M/2)H+]。
實施例8:(S)-MTMH-Val-Cit-ABA-PABO(CO)-MMAE。
步驟1:(S)-MTMH-Val-Cit-ABA-PAB-OH。
20℃氮氣保護下,往(S)-MTMH-纈氨酸(中間體3)(383毫克,1.05毫莫耳1.2當量)的N,N-二甲基甲醯胺(8毫升)溶液中依次一次性地加入二異丙基乙基胺(453毫克,3.50毫莫耳,4當量),HOBt(142毫克,1.05毫莫耳,1.2當量)和EDCI(202毫克,1.05毫莫耳,1.2當量)。反應混合物在20℃攪拌10分鐘後一次性地加入Cit-ABA-PAB-OH(中間體7)(320毫克,876微莫耳,1當量),反應液繼續在20℃攪拌反應16小時。薄層色譜檢測(二氯甲烷:甲醇=5:1)反應完畢。反應液濃縮,殘餘物用製備薄層色譜(二氧化矽,二氯甲烷:甲醇=10:1)純化,得到標題化合物粗品(370毫克)。LCMS:712.2(MH+)。
步驟2:(S)-MTMH-Val-Cit-ABA-PAB(4-硝基苯基)碳酸酯。
20℃氮氣保護下,往(S)-MTMH-Val-Cit-ABA-PAB-OH(370毫克,520微摩爾,1當量)的N,N-二甲基甲醯胺(10毫升)溶液中依次加入二異丙基乙基胺(80.6毫克,624微摩爾,1.2當量)和二(4-硝基苯基)碳酸酯(206毫克,676微摩爾,1.3當量)。反應液在20℃攪拌16小時。薄層色譜檢測(二氯甲烷:甲醇=10:1)原料反應完畢,濃縮反應液,殘餘物用製備薄層色譜(二氧化矽,二氯甲烷:甲醇=10:1)純化得到黃色油狀標題化合物(70毫克79.93微莫耳,收率15.36%)。LCMS:877.3(MH+)。
步驟3:(S)-MTMH-Val-Cit-ABA-PABO(CO)-MMAE。
20℃下,往(S)-MTMH-Val-Cit-ABA-PAB(4-硝基苯基)碳酸酯(70毫克,80微摩爾,1當量)和MMAE(57.3毫克,79.8微摩爾1當量)的N,N-二甲基甲醯胺(6毫升)溶液中依次加入HOBt(5.4毫克,39.9微摩爾,0.5當量)和吡啶(63.1毫克,798微摩爾10當量)。反應液在20℃攪拌16小時。薄層色譜檢測(二氯甲烷:甲醇=10:1)反應完成,反應液真空濃縮幹。殘餘物用製備高效液相色譜純化(甲酸體系,柱子,PhenomenexSynergiMax-RP250*8010u;條件,0.225%FA-CAN;B相開始濃度,40;B相結束濃度,70)得到白色標題化合物固體(40.8毫克,收率:48.6%)。LCMS:728.7[(M/2)H+]。
實施9。
赫賽汀(240mg)和藥物連接片段中間體MTMH-Val-Cit-PAB-OH(11.3mg)按照實施1的方法製備得到標題化合物ADC001(168mg,70%)。
其他赫賽汀類ADC的製備相似於實施9:
其他愛必妥類ADC的製備相似於實施9:
篩選合適的二肽單位作為藥物-連接橋中間體。
一個查明二肽單位是否適合在藥物-連接橋中間體中使用的方便方法如下。按照標準的肽化學製備方法如方案1所示:Cbz-保護的二肽經由對-氨基苄基羰基片段結合螢光標籤(7-氨基-4-methylcouramin,7-AMC)。按照Dubowchik(Biorg.Med.Chem.Lett.1998,8,3341-3346)文獻報導方法,在類似條件下將這些二肽底物用牛組織蛋白酶B孵育,其牛組織蛋白酶B水解率用的7-AMC(table1)的釋放來測量。新型二肽水解速率慢於底物A被拒絕。三個二肽單元中的FS-9,FS-10和FS-11被選作額外的二肽單元用於藥物-連接橋中間體的製備。
路線1:合成cbz-保護的二肽螢光材料底物。
體外細胞毒性試驗。
(a)乳腺癌細胞系HCC1954:乳腺癌細胞系HCC1954使用含10% FBS的RPMI 1640培養基,在37℃,5% CO2培養箱中進行培養。
加藥的前一天,收集細胞,在96孔板中按照2000細胞/孔的密度鋪板。第二天,將Herceptin和本專利中的ADCs稀釋至若干濃度(1,0.3333,0.1111,
0.037,0.0123,0.0041,0.0014,0.00046 and 0.00015μg/ml)加入細胞中。每個藥物濃度做三個複孔。
加藥72小時後,使用Cell Titer-Glo試劑盒(Promega)對細胞活性進行測定。
本研究所使用的對照ADC(ADC-HA),其結構中的正常醯胺鍵在其中心碳原子上帶有一個三氟喹酮基團。
(b)A-431細胞系:皮膚癌細胞系A-431使用含10% FBS的DMEM培養基,在37℃,5% CO2培養箱中進行培養。
加藥前一天,收集細胞,在96孔板中按照2000細胞/孔的密度鋪板。第二天,將Erbitux和本專利中的ADCs稀釋至若干濃度(10,3.33,1.11,0.37,0.123,0.041,0.014,0.0046 and 0.0015μg/ml)加入細胞中。每個藥物濃度做三個複孔。
加藥72小時後,使用Cell Titer-Glo kit(Promega)對細胞活性進行測定。
本研究中使用的對照ADC(ADC-EA)所含有的普通醯胺鍵在其中心碳原子上帶有一個三氟喹酮基團。
體內效力試驗。
(a)HCC1954異種移植瘤小鼠模型:將HCC1954細胞皮下接種7-8周齡雌性NOD-SCID小鼠。細胞注射7天后,瘤塊平均體積達到153mm3,即開始給藥。根據腫瘤的體積以及動物體重將小鼠進行隨機分組(每組8只)。使用本專利中的ADCs(15mpk)、Herceptin(15mpk)及溶媒對照在分組後第0天和第15天對小鼠進行給藥。第一次給藥28天后,當對照組小鼠瘤塊體積達到1092mm3後對小鼠實施安樂死。
(b)A431異種移植瘤小鼠模型:將A-431細胞皮下接種6-8周齡雌性Balb/c小鼠。細胞注射10天后,瘤塊平均體積達到172mm3,即開始給藥。根據腫瘤的體積以及動物體重將小鼠進行隨機分組(每組8只)。使用本專利中的ADCs(10mpk)、Erbitux(10mpk)及溶媒對照在分組後第0天和第15天對小鼠進行給藥。第一次給藥25天后,當對照組小鼠瘤塊體積達到2000mm3後對小鼠實施安樂死。
Claims (18)
- 一種如式(I)所示連接藥物和抗體的連接子,其中,
- 一種如式(II)所示藥物-連接子共軛物,其中,
- 一種如式(III)所示抗體-藥物偶聯物,其包含申請專利範圍第1項所述之連接子,其中,
- 如申請專利範圍第1項所述之連接體,或如申請專利範圍第3項所述之抗體-藥物偶聯物,其中,所述的抗體選自可優先結合到靶細胞的表面重塑的單克隆抗體、表面重塑的單鏈單克隆抗體、或表面重塑的單克隆抗體片段;或所述抗體選自人源化單克隆抗體、人源化單鏈單克隆抗體、或人源化單克隆抗體片段;或所述抗體選自嵌合抗體、嵌合抗體片段、域抗體或域抗體片段;或所述抗體選自MY9、anti-B4、EpCAM、CD2、CD3、CD4、CD5、CD6、CD11、CD19、CD20、CD22、CD26、CD30、CD33、CD37、CD38、CD40、CD44、CD56、CD79、CD105、CD138、EphA受體、EphB受體、EGFR、EGFRvIII、HER2、HER3、間皮素、cripto、alphavbeta3、alphavbeta5、alphavbeta6整合蛋白或C242;或所述抗體選自My9-6、B4、C242、N901、DS6、EphA2受體、CD38、IGF-IR、CNTO 95、B-B4、Trastuzumab、Tertuzumab、Bevatuzumab、Sibrotuzumab、Rituximab、和Adalimumab;或所述抗體選自Herceptin和Erbitux。
- 如申請專利範圍第1項所述之連接體或如申請專利範圍第3項所述之所述抗體-藥物偶聯物,其中,抗體結合的靶細胞選自:腫瘤細胞、病毒感染細胞、微生物感染細胞、寄生蟲感染細胞、自身免疫細胞;或可表達一個或多個IGF-IR、CanAg、EGFR、MUC1、MUC16、VEGF、TF、MY9、anti-B4、EpCAM、CD2、CD3、CD4、CD5、CD6、CD11、CD11a、CD18、CD19、CD20、CD22、CD26、CD30、CD33、CD37、CD38、CD40、CD44、 CD56、CD70、CD79、CD105、CD138、EphA受體、EphB受體、EGFRvIII、HER2/neu、HER3、mesothelin、cripto、alphavbeta3整合蛋白、alphavbeta5整合蛋白、alphavbeta6整合蛋白、Apo2、或C242抗原的細胞;或可表達胰島素生長因數受體、表皮生長因數受體、葉酸受體的細胞;具體地,腫瘤細胞選自乳腺癌細胞、前列腺癌細胞、卵巢癌細胞、直腸癌細胞、胃癌細胞、鱗狀細胞癌細胞、小細胞肺癌細胞、睾丸癌細胞。
- 如申請專利範圍第1項所述之連接體、如申請專利範圍第2項所述之藥物-連接子共軛物或如申請專利範圍第3項所述之抗體藥物偶聯物,其中所述藥物選自細胞毒性藥物;具體地,所述藥物選自maytansinoid、DNA結合藥物及其類似物、卡裡奇黴素、阿黴素及其類似物、長春花生物鹼、念珠藻素、尾海兔素、阿裡他汀及其類似物、tubulysin、埃博黴素、紫杉烷、siRNA;更具體地,DNA結合藥物選自CC-1065;更具體地,M選自:
- 如申請專利範圍第1項所述之連接子、如申請專利範圍第2項所述之藥物-連接子共軛物或如申請專利範圍第3項所述之抗體-藥物偶聯物,其中,L1選自:
- 如申請專利範圍第1項所述之連接子、如申請專利範圍第2項所述之藥物-連接子共軛物或如申請專利範圍第3項所述之抗體-藥物偶聯物,其中,L2選自:
- 如申請專利範圍第1項所述之的連接子、如申請專利範圍第2項之所述藥物-連接子共軛物或如申請專利範圍第3項之所述抗體-藥物偶聯物,其中所述連接在同一個C上的兩個R11或鄰位上的兩個R11連接在一起所形成的環選自環己基。
- 如申請專利範圍第1項所述之連接子、如申請專利範圍第2項所述之藥物-連接子共軛物、或如申請專利範圍第3項所述之抗體-藥物偶聯物,其中,L3選自:
- 如申請專利範圍第1項所述之連接子、如申請專利範圍第2項所述之藥物-連接子共軛物或如申請專利範圍第3項所述之抗體-藥物偶聯物,其中,結構單 元選自:
- 如申請專利範圍第1項所述之連接子或如申請專利範圍第3項所述之抗體-藥物偶聯物,其中所述連接子選自:
- 如申請專利範圍第2項所述之藥物-連接子共軛物,其選自:
- 如申請專利範圍第3項所述之抗體-藥物偶聯物,其選自:
- 一種藥物組合物,其包括申請專利範圍第2~14項中之任意一項所述的治療有效量的抗體-藥物偶聯物或其藥學上可接受的載體、稀釋劑或賦形劑。
- 如申請專利範圍第1~14中之任意一項所述連接子、藥物-連接子共軛物、抗體-藥物偶聯物或權利要求15所述組合物在製備治療癌症的藥物中的應用。
- 一種治療或診斷癌症的方法,包括給予患者有效量之申請專利範圍第2~14中之任意一項所述之抗體藥物偶聯物或申請專利範圍第15項所述之組合物。
- 一種作為製備式(Ⅱ)所示藥物-連接子共軛物或式(Ⅲ)所示抗體-藥物偶聯物的中間體,包括:
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CN108452319A (zh) * | 2017-02-20 | 2018-08-28 | 浙江特瑞思药业股份有限公司 | 靶向cd20的抗体偶联药物制剂 |
CN107488231B (zh) * | 2017-09-15 | 2020-10-30 | 四川大学 | 抗cd56抗体及其用途 |
CN107744592B (zh) * | 2017-09-15 | 2020-04-28 | 四川大学 | 抗cd56抗体与海兔毒素偶联复合物及其制备方法和用途 |
CN110090308B (zh) * | 2018-01-30 | 2023-03-24 | 四川科伦博泰生物医药股份有限公司 | 制备偶联物的方法 |
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Cited By (3)
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US10233212B2 (en) | 2015-11-03 | 2019-03-19 | Industrial Technology Research Institute | Compounds, linker-drugs and ligand-drug conjugates |
US10618935B2 (en) | 2015-11-03 | 2020-04-14 | Industrial Technology Research Institute | Antibody-drug conjugate (ADC) and method for forming the same |
US10683327B2 (en) | 2015-11-03 | 2020-06-16 | Industrial Technology Research Institute | Compounds, linker-drugs and ligand-drug conjugates |
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WO2016008112A1 (en) | 2016-01-21 |
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EP3169368B1 (en) | 2021-02-17 |
WO2016008392A1 (en) | 2016-01-21 |
CN107427591B (zh) | 2020-12-29 |
US10280229B2 (en) | 2019-05-07 |
JP7042291B2 (ja) | 2022-03-25 |
JP6688790B2 (ja) | 2020-05-20 |
JP2020079251A (ja) | 2020-05-28 |
US20170202974A1 (en) | 2017-07-20 |
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EP3169368A1 (en) | 2017-05-24 |
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