申请人:Wang Fan
公开号:US20060194867A1
公开(公告)日:2006-08-31
A process is provided for preparing (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, R-substituted ester 9 comprising:
(a) reacting the aldehyde 1 with the enolate form of (S)-2-hydroxy-1,2,2-triphenylethyl acetate substituent in a chelating co-solvent;
(b) hydrolysis of (R,S)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3-hydroxy-1-pentanoic acid, (S)-2-hydroxy-1,2,2-triphenylethyl ester (2a and 2b) using a base, preferably an alkali metal base, preferably in a solvent to form the carboxylic acid 7;
(c) treating the acid 7 with a chiral base to form a salt and purifying the salt to obtain enantiomerically enriched (R)-7 chiral base salt;
(d) alkylation of the (R)-7 chiral base salt or the free base derived from (R)-7, forming (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, R-substituted ester 9 and atorvastatin calcium 6,
wherein R is a C1 to C6 alkyl, C6 to C9 aryl or C7 to C10 aralkyl.
提供了一种制备(R)-5-[2-(4-氟苯基)-5-(1-甲基乙基)-3-苯基-4-[(苯基氨基)羰基]-1H-吡咯-1-基]-5-羟基-3-氧代-1-庚酸,R-取代酯9的过程,包括:(a)将醛1与(S)-2-羟基-1,2,2-三苯乙基醋酸酯取代物的烯醇形式在螯合共溶剂中反应;(b)水解(R,S)-5-[2-(4-氟苯基)-5-(1-甲基乙基)-3-苯基-4-[(苯基氨基)羰基]-1H-吡咯-1-基]-3-羟基-1-戊酸,(S)-2-羟基-1,2,2-三苯乙基酯(2a和2b)使用碱,优选为碱金属碱,优选在溶剂中形成羧酸7;(c)用手性碱处理酸7以形成盐并纯化盐以获得对映富集的(R)-7手性碱盐;(d)烷基化(R)-7手性碱盐或由(R)-7衍生的游离碱,形成(R)-5-[2-(4-氟苯基)-5-(1-甲基乙基)-3-苯基-4-[(苯基氨基)羰基]-1H-吡咯-1-基]-5-羟基-3-氧代-1-庚酸,R-取代酯9和阿托伐他汀钙6,其中R是C1到C6烷基,C6到C9芳基或C7到C10芳基甲基。