Y. Nakada, S. Muramatsu, M. Asai
Sep 1, 1978
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0
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Journal
Agricultural and biological chemistry
Abstract
A variety of 2,3-dihydrobenzo[b]furan-3-yl and 2,3-dihydrobenzo[b]thiophen-3-yl chrysanthemates were prepared and their insecticidal activity was tested on the American cockroach. Of these chrysanthemates, 7-methyl, 7-chloro and 5-chloro-4,6-dimethyl-2,3-dihydrobenzo-furanyl esters (9c, 11c and 18c) were much more potent than allethrin. Substituents on the 7-position of either the benzofuran or benzothiophen nucleus generally enhanced the activity compared with those on other positions.