Process for preparing trans-2,2-dimethyl-3-(2,2-dihalovinyl)-cyclopropane carboxylic acid halide
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0340985A1
公开(公告)日:1989-11-08
Trans-2,2-dimethyl-3-(2,2-dihalovinyl)-cyclopropane carboxylic acid halides which are an intermediate for insecticides are prepared by allowing arylphosphines or pyridines in the presence of iodine compounds, to react with cis- or cis-/trans-mixed 2,2-dimethyl-3-(2,2-dihalovinyl)-cylcopropane carboxylic acid halides of the formula
wherein both X and Y are halogen atoms, respectively, at a temperature of -10 ° to 100 °C, in the presence or absence of halogen compounds.
反式-2,2-二甲基-3-(2,2-二卤乙烯基)-环丙烷羧酸卤化物是杀虫剂的中间体,其制备方法是在有碘化合物存在的情况下,让芳基膦或吡啶与顺式或顺式/反式混合的 2,2-二甲基-3-(2,2-二卤乙烯基)-环丙烷羧酸卤化物反应,反应式为
其中 X 和 Y 分别为卤素原子,温度为-10 °至 100 °C,存在或不存在卤素化合物。