Novel syntheses of dihalovinylcyclopropanecarboxylates, including potent insecticides, are described. The processes begin with the reaction between an alkenol and an orthoester to produce a .gamma.-unsaturated carboxylate, followed by the catalyzed addition of a carbon tetrahalide to the double bond and dehydrohalogenation to produce a cyclopropane derivative.
本文介绍了二卤代
乙烯基环丙烷羧酸酯的新合成方法,其中包括强效
杀虫剂的合成方法。该过程始于烯醇和正酯反应生成γ-不饱和
羧酸酯,随后在双键上加入碳四卤化物并进行脱卤素反应,生成
环丙烷衍
生物。