AN IMPROVED PROCESS FOR THE PREPARATION OF PAROXETINE AND ITS INTERMEDIATE
申请人:PIRAMAL ENTERPRISES LIMITED
公开号:US20190315691A1
公开(公告)日:2019-10-17
The present invention provides an improved process for the preparation of N-protected ((3S,4R)-4-(4-fluorophenyl)piperidin-3-yl)methanol (compound (A)) and further its transformation to Paroxetine and its pharmaceutically acceptable salts. The process comprises reaction of compound (II) with amido-malonate compound (C) in the presence of a chiral catalyst and optionally a dehydrating agent to obtain compound (B); followed by reduction of (B) in the presence of a reducing agent to provide compound (A).