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.
描述了二卤
乙烯基环丙烷羧酸酯的新合成方法,其中包括强效
杀虫剂。该过程始于烯醇与正酯之间的反应,产生γ-不饱和
羧酸酯,随后通过催化加入碳四卤化物到双键,并进行脱卤化反应,生成
环丙烷衍
生物。