A compound of formula I
in which formula:
Ar represents a phenyl or naphthyl group optionally substituted by one or more halogen, alkoxy, haloalkoxy, methylenedioxy, C1-C6 alkyl or haloalkyl groups;
R1 represents the group -CH(CF3)CH3 or C(CF3)=CH2;
R2 represents the residue of an alcohol R2 CHDOH in which D is hydrogen or cyano and of which the [IR, cis]2,2-dimethyl-3-(2,2-dibromovinyl)cyclopropane carboxylic ester is significantly insecticidal.
                            一种式 I 的化合物,式中:Ar 代表苯基或
萘基,可任选被一个或多个卤素、烷氧基、卤代烷氧基、亚甲基二氧基、C1-C6 烷基或卤代烷基取代;R1 代表基团-CH(
CF3)
CH3 或 C(   )=
CH2;R2 代表醇 R2 CHDOH 的残基,其中 D 为氢或
氰基,其[IR,顺式]2,2-二甲基-3-(2,2-二
溴乙烯基)
环丙烷羧酸酯具有明显的杀虫作用。