| 摘要 |
Title compds.[I; R = F, Cl, Br or Me; m,n = 0-5; m+n < 5 useful as insecticide, were prepd. by reaction by II and III in 20-100≦̸C. Thus, 0.1 mol potassium(±)trans-2,2-dimethyl-3-dichlorovinyl-cyclopropanecarboxylate reacted with 0.1 mol pentafluorobenzylchloride in acetonitrile, concentrated, and treated with water and petroleum ether to give (±)trans-2,2-dimethyl-3-dichlorovinyl-cyclopropane-carboxylic pentafluorobenzyl ester.
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