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US4214097A Process for preparing dihalovinylcyclopropanecarboxylates 失效
制备二卤代乙酰基环丙烷羧酸酯的方法

Process for preparing dihalovinylcyclopropanecarboxylates
摘要:
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.
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