申请人:Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
公开号:US04814506A1
公开(公告)日:1989-03-21
A process for preparing 3-halogeno-2-hydroxy-propyltrimethylammonium halide or especially one having the (S)-configuration, which comprises reacting 2,3-dihydroxypropyltrimethylammonium halide or one having the (S)-configuration, which is obtained by reacting (R)-3-halogeno-1,2-propanediol with trimethylamine, with a halogenating reagent. According to the present invention, 3-halogeno-2-hydroxypropyltrimethylammonium halide or one having the (S)-configuration, which is a useful intermediate for the synthesis of carnitine or especially (l)-carnitine, can be obtained economically, efficiently and easily.
一种制备3-卤代-2-羟基丙基三甲基铵卤化物或特别是具有(S)-构型的方法,包括将2,3-二羟基丙基三甲基铵卤化物或具有(S)-构型的化合物与卤代试剂反应。根据本发明,可以经济、高效和容易地获得对合成肉碱或特别是(L)-肉碱有用的中间体3-卤代-2-羟基丙基三甲基铵卤化物或具有(S)-构型。