Substituted 3-(1,2-dibromo-alkyl)-2,2-dimethyl-cyclopropane-1-carboxylic acid esters of the formula ##STR1## in which R.sup.1 is halogen or optionally substituted phenyl or optionally substituted alkyl, R.sup.2 is hydrogen, halogen or optionally substituted alkyl, and Y is the radical of an alcohol customary in pyrethroids, with the proviso that Y is a benzyloxy radical which is substituted by halogen and optionally substituted by at least one additional radical if R.sup.1 is halogen or methyl, which possess pesticidal properties. The acid moieties of such esters wherein R.sup.1 is optionally substituted phenyl are new compounds.
用公式表示的化合物是具有杀虫性质的。该化合物是公式为:##STR1## 的3-(1,2-二
溴烷基)-2,2-二
甲基环丙烷-1-
羧酸酯,其中R1是卤素或可选择取代的苯基或可选择取代的烷基,R2是氢、卤素或可选择取代的烷基,Y是
杀虫剂中常见的醇基团的自由基,但当R1为卤素或甲基时,Y是被卤素取代和可选择取代至少一个附加基团的苄氧基团。其中,当R1为可选择取代的苯基时,酸基部分是新的化合物。