Imperial Chemical Industries Limited

Philip D Bentley

Nazim Punja

Eric George Savins

Compounds of formula I wherein R.sup.1 and R.sup.2 are each selected from halomethyl and halo and R is nitro, cyano, lower alkoxycarbonyl, lower alkylcarbonyl, or di- or trifluoromethyl, and n has a value of zero to four, and compositions comprising them are useful as insecticides in agriculture, horticulture and other outlets. They may optionally be combined with other pesticides and/or synergists. The compounds may be prepared by conventional esterification processes from the corresponding acids and appropriately substituted benzyl alcohols or halides, some of which are novel. ##STR1##

Halogenated benzyl alcohols and halides

Halogenated esters

Quaternary ammonium salts consisting of cations and anions wherein the cations have the formula: ##STR1## and the anions are halide ions. These salts which are useful as intermediates in the preparation of 3-phenoxybenzaldehyde, may be prepared by reacting a 3-phenoxybenzyl halide with hexamethylenetetramine.

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Bracknell, United Kingdom

Philip D Bentley