Chiral resolution method for producing compounds useful in the synthesis of taxanes
申请人:——
公开号:US20030045743A1
公开(公告)日:2003-03-06
A method is provided for processing a solution having optical isomers to obtain a (2R,3S) target isomer:
1
wherein P
1
is H or a hydroxyl protecting group, R
1
is H, an alkyl group, an olefinic group or an aromatic group, and R
2
is H or R
3
CO, where R
3
is an alkyl group, an olefinic group, an aromatic group, an O-alkyl group, an O-olefinic group or an O-aromatic group, provided that R
1
is not H when R
3
is Ph and P
1
is H. The method includes passing the solution through a chromatographic stationary phase, such as S,S Whelk-O, that has a greater affinity for one of the target isomer and an optical isomer thereof. A portion of the solution with the target isomer is then collected. The solution may be a racemic mixture of (±)-N-CBZ-3-phenylisoserine ethyl ester.
提供了一种处理具有光学异构体的溶液以获得(2R,3S)目标异构体的方法:其中P1为H或羟基保护基,R1为H,烷基,烯丙基或芳基,R2为H或R3CO,其中R3为烷基,烯丙基,芳基,O-烷基,O-烯丙基或O-芳基,前提是当R3为Ph且P1为H时,R1不是H。该方法包括通过具有更大亲和力的色谱固定相(例如S,S Whelk-O)通过溶液,其中具有目标异构体和其光学异构体之一的亲和力更大。然后收集具有目标异构体的溶液的一部分。溶液可以是(±)-N-CBZ-3-苯基异丝氨酸乙酯的混合物。