Process for the preparation of metaxalone
    1.
    发明授权
    Process for the preparation of metaxalone 有权
    制备美沙酮的方法

    公开(公告)号:US06538142B1

    公开(公告)日:2003-03-25

    申请号:US10124474

    申请日:2002-04-18

    IPC分类号: C07D26304

    CPC分类号: C07D263/24

    摘要: A process for the preparation of 5-(3,5-dimethylphenoxymethyl)-2-oxazolidinone, which includes: a) reacting 3,5-dimethylphonel with epichlorohydrin to obtain a mixture of 1-(3,5-dimethylphenoxy)2,3-epoxy propane (1) and 1-(3,5-dimethylphenoxy)-3-chloro-2-propanol (2); b) reacting the mixture of (1) and (2) obtained from step (a) with benzylamine to obtain a first compound; c) reducing the first compound with hydrogen in presence of ammonia, to obtain a second compound; and d) reacting the second compound with dimethylcarbonate in the presence of a strong base to obtain 5-(3,5-dimethlphenoxymethyl)-2-oxazolidinone.

    摘要翻译: 制备5-(3,5-二甲基苯氧基甲基)-2-恶唑烷酮的方法,其包括:a)使3,5-二甲基菲酮与表氯醇反应,得到1-(3,5-二甲基苯氧基) - 环氧丙烷(1)和1-(3,5-二甲基苯氧基)-3-氯-2-丙醇(2); b)将得自步骤(a)的(1)和(2)的混合物与苄胺反应 获得第一化合物; c)在氨存在下用氢还原第一化合物,得到第二化合物; 和d)在强碱存在下使第二化合物与碳酸二甲酯反应,得到5-(3,5-二甲基苯氧基甲基)-2-恶唑烷酮。