Process for the purification of carvedilol or its salts thereof
    3.
    发明申请
    Process for the purification of carvedilol or its salts thereof 审中-公开
    卡维地洛或其盐的净化方法

    公开(公告)号:US20080207726A1

    公开(公告)日:2008-08-28

    申请号:US11823910

    申请日:2007-06-28

    CPC分类号: C07D209/88

    摘要: The present invention provides processes for reducing bis impurities ((1,1′-[2-(2-methoxyphenoxy)ethyl]iminobis-[3-(9H-carbazol-4-yloxy)]-propan-2-ol)), in particular Bis 1 and Bis 2, in carvedilol preparations. The process may comprise (a) combining carvedilol base with phosphoric acid in ethanol to obtain a reaction mixture; and (b) precipitating carvedilol phosphate from the reaction mixture, where the carvedilol phosphate comprises low levels of Bis 1 and Bis 2.

    摘要翻译: 本发明提供还原双杂质((1,1' - [2-(2-甲氧基苯氧基)乙基]亚氨基双 - [3-(9H-咔唑-4-基氧基)] - 丙-2-醇)的方法, 特别是Bis 1和Bis 2,在卡维地洛制剂中。 该方法可以包括(a)将卡维地洛碱与磷酸在乙醇中混合以获得反应混合物; 和(b)从反应混合物中沉淀出卡维地洛磷酸盐,其中磷酸卡维地洛包括低水平的Bis 1和Bis 2。