The invention relates to a process for the preparation of compounds of general formula (III), wherein R represents fluorine or chlorine atom and X represents chlorine or bromine atom, by halogenation of cyclopropyl benzyl ketone of general formula (II), wherein R represents fluorine or chlorine atom and the halogenation is carried out in the mixture of aqueous hydrogen halide and aqueous hydrogen peroxide in the presence of a water miscible solvent or in the presence of a phase transfer catalyst; or the halogenation is carried out in the mixture of sulfuric acid and an alkali metal salt of aqueous hydrogen halide. The process can be applied preferably on industrial scale.
本发明涉及一种制备通式(III)化合物的方法,其中R代表
氟或
氯原子,X代表
氯或
溴原子,通过对通式(II)的
环丙基苯甲酮进行卤代反应得到,其中R代表
氟或
氯原子,并且在
水溶性溶剂或相转移催化剂的存在下,在
水合氢卤酸和
水合
过氧化氢混合物中进行卤代反应;或在
硫酸和
水合氢卤酸的碱
金属盐混合物中进行卤代反应。该方法可在工业规模下进行。