申请人:SUMITOMO CHEMICAL COMPANY LIMITED
公开号:EP0637580A1
公开(公告)日:1995-02-08
A 1-bromoalkylbenzene derivative is prepared by reacting a phenylalkene derivative with hydrogen bromide in the presence of a non-polar solvent. The phenylalkene derivative is prepared by reacting an alkenyl halide with metal magnesium to form a Grignard reagent, and then reacting the Grignard reagent with a benzyl halide derivative. An allyl Grignard reagent is prepared by reacting continuously an allyl halide derivative with metal magnesium in an organic solvent, in which the allyl halide derivative and metal magnesium are continuously added to the reaction system and the allyl Grignard reagent formed is continuously removed from the reaction system. The processes provide the intended compounds in high yields, high selectivities and high purities.
1-bromoalkylbenzene derivative is prepared by reacting a phenylalkene derivative with hydrogen bromide in the presence of a non-polar solvent.苯基烷烃衍生物的制备方法是先使烯基卤化物与金属镁反应生成格氏试剂,然后使格氏试剂与苄基卤化物衍生物反应。烯丙基格氏试剂是通过烯丙基卤化物衍生物与金属镁在有机溶剂中连续反应制备的,其中烯丙基卤化物衍生物和金属镁被连续加入反应体系,形成的烯丙基格氏试剂被连续从反应体系中移除。这些工艺可提供高产率、高选择性和高纯度的预期化合物。