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    • 9. 发明申请
    • Process for Preparation of Chiral Amlodipine Gentisate
    • 手性氨氯地平龙胆酸的制备方法
    • US20080306277A1
    • 2008-12-11
    • US12090264
    • 2006-10-17
    • Jae-Sun KimNam Ho KimNam Kyu Lee
    • Jae-Sun KimNam Ho KimNam Kyu Lee
    • C07D211/90
    • C07D211/90
    • 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龙胆酸盐的方法,更具体地说,涉及一种以高产率和高光学纯度制备光学纯氨氯地平龙胆酸盐的连续方法。 该方法可以通过在包含异丙醇的溶剂的存在下首先使外消旋(R,S) - 氨氯地平和光学纯的O,O-二苯甲酰基酒石酸反应来制备(R) - 或(S) - 氨氯地平二苯甲酰三酸盐非对映异构体或 溶剂合物,用碱处理制备的氨氯地平非对映体盐或其溶剂合物,然后最后加入龙胆酸。