申请人:Dr. Reddy's Laboratories Ltd.
公开号:US20140243412A1
公开(公告)日:2014-08-28
Aspects of the present invention relate to improved process for preparation of (R)(−)-3-(carbamoylmethyl)-5-methylhexanoic acid (R-CMHA) of the formula (II) or its pharmaceutically acceptable salts in the presence of a lewis acid, process for preparation of pregabalin using R-CMHA of the formula (II) or its pharmaceutically acceptable salts prepared according to the present invention and process for preparation of pregabalin with low amount of undesired impurity.
本发明涉及改进的制备(R)(−)-3-(carbamoylmethyl)-5-methylhexanoic acid (R-CMHA) (II式)或其药学上可接受的盐的工艺,其中存在一种路易斯酸,在制备过程中使用经本发明制备的公式(II)或其药学上可接受的盐的R-CMHA,以及制备低量不良杂质的pregabalin的工艺。