Preparation of chloromethylpyridine hydrochlorides
    5.
    发明授权
    Preparation of chloromethylpyridine hydrochlorides 失效
    氯甲基吡啶盐酸盐的制备

    公开(公告)号:US5942625A

    公开(公告)日:1999-08-24

    申请号:US187402

    申请日:1998-11-06

    IPC分类号: C07D213/26

    CPC分类号: C07D213/26

    摘要: Chloromethylpyridine hydrochlorides such as 3-chloromethylpyridine hydrochloride, an important pharmaceutical intermediate, are prepared in high yield and high purity by reacting the corresponding pyridyl carbinol with a slight excess of thionyl chloride, in solution in an inert solvent such as toluene. The pyridyl carbinol solution is added to the thionyl chloride gradually and under its surface, to prevent the formation of impurities. The product is recovered by applying vacuum or nitrogen purge to the reaction mixture to assist precipitation, followed by filtration and washing.

    摘要翻译: 氯甲基吡啶盐酸盐如3-氯甲基吡啶盐酸盐,重要的药物中间体,通过在惰性溶剂如甲苯中的溶液中使相应的吡啶基甲醇与稍过量的亚硫酰氯反应,以高产率和高纯度制备。 将吡啶基甲醇溶液逐渐加入到亚硫酰氯的表面,以防止杂质的形成。 通过对反应混合物进行真空或氮气吹扫来回收产物以辅助沉淀,随后过滤和洗涤。