申请人:Kim Jae-Sun
公开号:US20080306277A1
公开(公告)日:2008-12-11
The present invention relates to a process for the preparation of optically pure amlodipine gentisate, more particularly to a continuous process for the preparation of optically pure amlodipine gentisate with good yield and high optical purity. The processes can be preformed by first reacting racemic (R,S)-amlodipine and optically pure O,O′-dibenzoyltartaric acid in the presence of a solvent including isopropanol to prepare (R)- or (S)-amlodipine dibenzoyltartarate diastereomer or a solvate thereof, treating the prepared amlodipine diastereomeric salt or a solvate thereof with a base and then finally adding gentisic acid.
本发明涉及一种制备光学纯氨氯地平吉替酸盐的方法,更具体地说,涉及一种制备光学纯氨氯地平吉替酸盐的连续工艺,其收率高,光学纯度高。该工艺可通过首先在异丙醇溶剂的存在下反应外消旋(R,S)-氨氯地平和光学纯O,O'-二苯乙酰酒石酸,以制备(R)-或(S)-氨氯地平二苯乙酰酒石酸二对映体或其溶剂化物,处理制备好的氨氯地平二对映体盐或其溶剂化物,加入碱,最后再加入吉替酸。