Process for preparing 1-(3,5-dimethoxy-4-hydroxy
phenyl)-2-(N-methylamino) ethanol hydrochloride
    5.
    发明授权
    Process for preparing 1-(3,5-dimethoxy-4-hydroxy phenyl)-2-(N-methylamino) ethanol hydrochloride 失效
    制备1-(3,5-二甲氧基-4-羟基苯基)-2-(N-甲基氨基)乙醇盐酸盐的方法

    公开(公告)号:US4408074A

    公开(公告)日:1983-10-04

    申请号:US317517

    申请日:1981-11-02

    CPC分类号: C07C43/23 C07C309/00

    摘要: A process for preparing 1-(3,5-dimethoxy-4-hydroxy phenyl)-2-(N-methylamino) ethanol hydrochloride is described by reacting 2,6-dimethoxyphenol with anhydrous chloral in the presence of a catalyst, hydrolyzing 1-(3,5-dimethoxy-4-hydroxyphenyl)2,2,2-trichloro ethanol and subsequently isolating the 3,5-dimethoxy-4-hydroxyphenyl glyoxal thus obtained; finally, this compound, in the form of the bisulfite, is directly converted to the desired product by amination with methylamine in the presence of hydrogen with a hydrogenation catalyst and the final product is converted into the hydrochloride.

    摘要翻译: 通过在催化剂存在下使2,6-二甲氧基苯酚与无水氯醛反应来描述制备1-(3,5-二甲氧基-4-羟基苯基)-2-(N-甲基氨基)乙醇盐酸盐的方法, (3,5-二甲氧基-4-羟基苯基)2,2,2-三氯乙醇,随后分离得到的3,5-二甲氧基-4-羟基苯基乙二醛; 最后,该亚硫酸氢盐形式的化合物通过在氢气存在下用甲胺与氢化催化剂进行胺化直接转化为所需产物,并将最终产物转化成盐酸盐。