Studies on the Syntheses of the Pyrethrin Analogues and their Biological Activities

Part I. Allethronyl Esters of Cyclopropanecarboxylic Acids

Abstract

Some new allethronyl esters of cyclopropanecarboxylic acids were prepared, and their insecticidal activities were tested against common housefly. Allethronyl esters of cyclopropanecarboxylic acids having 3, 4-methylenedioxyphenyl group on the cyclopropane ring were more or less toxic. Among them, allethronyl 2, 2-dimethyl-3-(3', 4'-methylenedioxyphenyl)-cyclopropane-l-carboxylate was found to be more toxic than α-dl-trans-allethrin, and the calculated relative effectiveness were 1.48 and 1.21 on the mortality and knock-down activity respectively as compared with α-dl-trans-allethrin.