Method for preparing bromomenthyl-biphenyl derivatives
    1.
    发明授权
    Method for preparing bromomenthyl-biphenyl derivatives 有权
    溴代联苯衍生物的制备方法

    公开(公告)号:US06214999B1

    公开(公告)日:2001-04-10

    申请号:US09554566

    申请日:2000-07-14

    IPC分类号: C07D25704

    摘要: The present invention relates to a process for the preparation of 4′-bromomethyl-biphenyl derivatives of the formula: by reacting a 4′-methyl-biphenyl derivative of the formula: with a brominating agent a in a hydrobromic acid/alkali metal bromate system in a two-phase medium, and under photo-iradiation, where R is as defined in the specification.

    摘要翻译: 本发明涉及一种制备下式的4'-溴甲基 - 联苯衍生物的方法:将下式的4'-甲基 - 联苯衍生物与氢溴酸/碱金属溴酸盐体系中的溴化剂a反应 在两相介质中和在光照下,其中R如说明书中所定义。

    Method for preparing a thiopene derivative
    3.
    发明授权
    Method for preparing a thiopene derivative 有权
    硫萜衍生物的制备方法

    公开(公告)号:US06639083B1

    公开(公告)日:2003-10-28

    申请号:US10111159

    申请日:2002-04-19

    IPC分类号: C07D33308

    CPC分类号: C07D333/16

    摘要: The invention relates to a process for preparing 2-thienyl-2-ethanol, in which: a) thiophene is metallated using an alkali metal, in the presence of an electron transfer agent, b) the compound obtained is treated with ethylene oxide, c) the thienyl derivative thus formed is hydrolyzed, to give the desired compound. 2-Thienyl-2-ethanol is a synthetic intermediate.

    摘要翻译: 本发明涉及一种制备2-噻吩-2-乙醇的方法,其中:a)噻吩在电子转移剂存在下用碱金属进行金属化,b)所得化合物用环氧乙烷处理,c )将由此形成的噻吩基衍生物水解,得到所需化合物。2-噻吩基-2-乙醇是合成中间体。