申请人:Joshi Shriram Narendra
公开号:US20070032661A1
公开(公告)日:2007-02-08
A process for the preparation of (2S, 3aS, 7aS)perhydroindole-2-carboxylic acid is provided comprising (a) esterifying a cis-perhydroindole-2-carboxylic acid with a first alcohol of the formula ROH and a suitable free acid to provide the acid salt (AS) of Formula V:
(b) reacting the acid salt of Formula V with a first base to provide a compound of Formula VI:
(c) treating the product of step (b) with an L-tartaric containing acid in a second alcohol of the formula ROH to precipitate a compound of Formula VII:
(d) reacting the compound of Formula VII with a second base to provide a compound of Formula II
(e) hydrolyzing the compound of Formula II to provide the (2S, 3aS, 7aS)perhydroindole-2-carboxylic acid.
提供一种制备(2S, 3aS, 7aS)环己烷基吲哚-2-羧酸的方法,包括(a)用式为ROH的第一醇和适当的游离酸酯化顺式环己基吲哚-2-羧酸,以得到化合物V的酸盐(AS):(b)用第一碱处理化合物V的酸盐,得到化合物VI:(c)用含有L-酒石酸的酸处理步骤(b)的产物,使其在式为ROH的第二醇中沉淀出化合物VII:(d)用第二碱处理化合物VII,得到化合物II:(e)水解化合物II,得到(2S, 3aS, 7aS)环己烷基吲哚-2-羧酸。