Process for the preparation of m-phenoxybenzaldehyde

Details Process for the preparation of m-phenoxybenzaldehyde Process for the preparation of m-phenoxybenzaldehyde

1976-09-22

1978-08-22

Helfin, Bernard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260612R, 204158HA, C07C 4500

Patent

active

041089049

ABSTRACT:
This is a novel process for the preparation of m-phenoxybenzaldehyde, a useful and valuable intermediate for the synthesis of pyrethroid type pesticides. The process comprises halogenation of m-phenoxytoluene on the side chain, in an inert solvent and in the presence of free radical initiators or strong light to a mixture of the corresponding mono and dihalo derivatives, and conversion of the mixture to m-phenoxybenzaldehyde by a Sommelet-type reaction.

REFERENCES:
patent: 2816144 (1957-12-01), Harris
patent: 2817632 (1957-12-01), Mayor
patent: 2817633 (1957-12-01), Mayor
patent: 3442960 (1969-05-01), De Puy et al.
patent: 3448156 (1969-06-01), Taussig et al.
patent: 3624157 (1971-11-01), Ingwalson
B. Y. Libman et al.; Zhurnal Prikladnoi Khimii, vol. 39, No. 7 (1966), pp. 1669-1670.

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