申请人:Guntoori Reddy Bhaskar
公开号:US20050203302A1
公开(公告)日:2005-09-15
A process for preparing (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-
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H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, tert-butylester comprising:
(a) reduction of 5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-
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H-pyrrol-1-yl]-3-oxo-1-pentanoic acid, (R)-2-hydroxy-1,2,2-triphenylethyl ester;
(b) hydrolysis of (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-
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H-pyrrol-1-yl]-3-hydroxy-1-pentanoic acid, (R)-2-hydroxy-1,2,2-triphenylethyl ester using an alkali base in a solvent to form the acid;
(c) alkylation of the acid forming (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-
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H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, tert-butylester.
制备(R)-5-[2-(4-氟苯基)-5-(1-甲基乙基)-3-苯基-4-[(苯氨基)羰基]-1H-吡咯-1-基]-5-羟基-3-氧代-1-庚酸叔丁酯的过程包括:(a)还原5-[2-(4-氟苯基)-5-(1-甲基乙基)-3-苯基-4-[(苯氨基)羰基]-1H-吡咯-1-基]-3-氧代-1-戊酸(R)-2-羟基-1,2,2-三苯基乙酯;(b)使用碱性溶剂水解(R)-5-[2-(4-氟苯基)-5-(1-甲基乙基)-3-苯基-4-[(苯氨基)羰基]-1H-吡咯-1-基]-3-羟基-1-戊酸(R)-2-羟基-1,2,2-三苯基乙酯,形成酸;(c)烷基化酸,形成(R)-5-[2-(4-氟苯基)-5-(1-甲基乙基)-3-苯基-4-[(苯氨基)羰基]-1H-吡咯-1-基]-5-羟基-3-氧代-1-庚酸叔丁酯。