申请人:G. D. Searle & Co.
公开号:US05536869A1
公开(公告)日:1996-07-16
The present invention relates to a novel process for the preparation of ethyl 3S-[[4-[[4-(aminoiminomethyl)phenyl]amino]-1,4-dioxobutyl]amino]-4-pentyno ate and pharmaceutically acceptable acid addition salt thereof which comprises treating (trimethylsilyl)acetylene sequentially with n-butyllithium and 4-formylmorpholine followed by acid hydrolysis to give 3-(trimethylsilyl)-2-propynal; treating 3-(trimethylsilyl)-2-propynal with lithium bis(trimethylsilyl)amide to give in situ N,3-bis(trimethylsilyl)-2-propyn-1-imine; condensation of N,3-bis(trimethylsilyl)-2-propyn-1-imine with lithium t-butyl acetate to give (.+-.)1,1-dimethylethyl 3-amino-5-(trimethylsilyl)-4-pentynoate; treating (.+-.)1,1-dimethylethyl 3-amino-5-(trimethylsilyl)-4-pentynoate- with p-toluenesulfonic acid to give (.+-.)1,1-dimethylethyl 3-amino-5-(trimethylsilyl)-4-pentynoate, mono p-toluenesulfonic acid salt, treatment of resulting salt with ethanol in the presence of p-toluenesulfonic acid to give (.+-.)ethyl 3-amino-5-(trimethylsilyl)-4-pentynoate; desilylation of (.+-.)ethyl 3-amino-5-(trimethylsilyl)-4-pentynoate to give in situ (.+-.)ethyl 3-amino-4-pentynoate; resolution of (.+-.)ethyl 3-amino-4-pentynoate using (R)-(-)-mandelic acid and treatment of the resolved product with gaseous hydrochloric acid to give ethyl 3S-amino-4-pentynoate, monohydrochloride; coupling the ethyl 3S-amino-4-pentynoate, monohydrochloride to 4-[[4-(aminoiminomethyl)phenyl]amino]-4-oxobutanoic acid, monohydrochloride in the presence of isobutyl chloroformate and N-methylmorpholine to give ethyl 3S-[[4-[[4-(aminoiminomethyl)phenyl]amino]-1,4-dioxobutyl]amino]-4-pentyno ate, monohydrochloride.
本发明涉及一种新型制备乙基3S-[[4-[[4-(氨基亚甲基)苯基]氨基]-1,4-二氧戊基]氨基]-4-戊炔酸乙酯及其药学上可接受的酸加成盐的方法,该方法包括以下步骤:将(三甲基硅基)乙炔依次与正丁基锂和4-甲酰吗啉处理,然后进行酸水解以得到3-(三甲基硅基)-2-丙炔醛;将3-(三甲基硅基)-2-丙炔醛与双(三甲基硅基)胺锂处理以在位生成N,3-双(三甲基硅基)-2-丙炔-1-亚胺;将N,3-双(三甲基硅基)-2-丙炔-1-亚胺与叔丁基乙酸锂缩合以得到(.+-.)1,1-二甲基乙基3-氨基-5-(三甲基硅基)-4-戊炔酸乙酯;将(.+-.)1,1-二甲基乙基3-氨基-5-(三甲基硅基)-4-戊炔酸乙酯与对甲苯磺酸处理以得到(.+-.)1,1-二甲基乙基3-氨基-5-(三甲基硅基)-4-戊炔酸乙酯单对甲苯磺酸盐,将所得盐在对甲苯磺酸存在下与乙醇处理以得到(.+-.)乙基3-氨基-5-(三甲基硅基)-4-戊炔酸乙酯;去硅化(.+-.)乙基3-氨基-5-(三甲基硅基)-4-戊炔酸乙酯以在位生成(.+-.)乙基3-氨基-4-戊炔酸乙酯;使用(R)-(-)-苯基乙酸对(.+-.)乙基3-氨基-4-戊炔酸乙酯进行拆分,然后在气态盐酸存在下处理拆分产物以得到乙基3S-氨基-4-戊炔酸乙酯单盐酸盐;将乙基3S-氨基-4-戊炔酸乙酯单盐酸盐与4-[[4-(氨基亚甲基)苯基]氨基]-4-氧代丁酸单盐酸盐在异丙基氯甲酸酯和N-甲基吗啡存在下偶联以得到乙基3S-[[4-[[4-(氨基亚甲基)苯基]氨基]-1,4-二氧戊基]氨基]-4-戊炔酸乙酯单盐酸盐。