Search for insecticides – Part II

A.B. Sen & P. M. Bhargava

Published in: Journal of the Indian Chemical Society, 1949, 26, 243-244

Abstract:

Trichloroacetates of o-chlorophenol, m-chlorophenol, catechol, resorcinol and hydroquinone have been prepared.

It is necessary to have a grouping which confers lipoid solubility and another one possessing toxicity, in the molecule of a good contact insecticide (Busvine, Nature, 1945, 156, 179). A number of esters of trichloroacetic acid and halogenated phenols have been prepared with this aim in view (Sen and Bhargava, this Journal, 1948, 25, 277). In this paper, the preparation of trichloroacetates of o-chlorophenol, m-chlorophenol, catechol, resorcinol and hydroquinone have been described. The trichloroacetyl esters of o- and m-chlorophenol are odourless liquids and are obtained in nearly theoretical yields. The di-trichloroacetate of resorcinol, catechol and hydroquinone are not obtained in so good yields; these esters darken on exposure to light and the last two are very hygroscopic.

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Search for insecticides – Part II. A B SEN & P M BHARGAVA. Journal of the Indian Chemical Society, 1949, 26, 243-244.

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