A process for the preparation of a styrylcyclopropane-1-carboxylic acid ester of the formula ##STR1## in which R is C.sub.1-4 -alkyl or an alcohol radical customary in pyrethroids, R.sup.1 is alkoxy or alkylthio, either of which may be optionally substituted by halogen, R.sup.2 is hydrogen or alkoxy, or R.sup.1 and R.sup.2 together are optionally halogen-substituted alkylenedioxy, and R.sup.3 is hydrogen or chlorine, comprising reacting an ester of the formula ##STR2## in which Hal is chlorine or bromine, with a base. The compounds are insecticidally active. Numerous syntheses of the starting materials, some involving new intermediates, are also shown.
一种制备式为##STR1##的苯
乙烯基环丙烷-1-
羧酸酯的方法,其中R是C.sub.1-4-烷基或惯用于拟
除虫菊酯的醇基,R.sup.1是烷氧基或烷
硫基,其中任一可以选择性地被卤素取代,R.sup.2是氢或烷氧基,或R.sup.1和R.sup.2一起是选择性卤素取代的烷二氧基,R.sup.3是氢或
氯,包括通过与碱反应式为##STR2##的酯的化合物。这些化合物具有杀虫活性。此外,还显示了许多起始材料的合成方法,其中一些涉及新的中间体。