申请人:Kankan Rajendra Narayanrao
公开号:US20130165686A1
公开(公告)日:2013-06-27
The present invention relates to a process for the preparation of substantially pure nateglinide of formula (I), substantially free from the cis-isomer and L-enantiomer and preparation of enantiomerically pure nateglinide form B, directly from the hydrolysis of a (−)-N-(trans-4-isopropylcyclohexyl-1-carbonyl)-D-phenylalanine alkyl ester in a ketonic solvent or water or mixture thereof.
本发明涉及一种制备基本纯的nateglinide(I)的方法,基本上不含顺式异构体和L-对映体,并且直接从(-)-N-(反-4-异丙基环己基-1-羰基)-D-苯丙氨酸烷基酯在酮溶剂或水或其混合物中水解制备对映纯的nateglinide B的方法。