Methods for the preparation of Entacapone
    1.
    发明申请
    Methods for the preparation of Entacapone 有权
    恩他卡朋的制备方法

    公开(公告)号:US20070060767A1

    公开(公告)日:2007-03-15

    申请号:US11478552

    申请日:2006-06-29

    IPC分类号: C07C255/29

    CPC分类号: C07C253/30 C07C255/41

    摘要: The invention disclosed in this application relates to an improved process for the preparation of Entacapone. In one embodiment the process involves: (i) reacting a 3-alkoxy-4-hydroxy-5-nitrobenzadehyde with N,N-diethylaminocyanoacetamide in the presence of a mild acid catalyst and a solvent, to provide a 3-O-alkylated Entacapone, and treating the 3-O-alkylated Entacapone with an acid catalyst in the presence of an organic base to provide Entacapone.

    摘要翻译: 本申请中公开的发明涉及一种改进的恩他卡朋制备方法。 在一个实施方案中,该方法包括:(i)在温和的酸催化剂和溶剂的存在下使3-烷氧基-4-羟基-5-硝基苯甲酸与N,N-二乙基氨基氰基乙酰胺反应,得到3-O-烷基化的恩他卡朋 ,并在有机碱存在下用酸催化剂处理3-O-烷基化的恩他卡朋,以提供恩他卡朋。