Process for the preparation of 4-halomethylbenzaldehyde

Details Process for the preparation of 4-halomethylbenzaldehyde Process for the preparation of 4-halomethylbenzaldehyde

1987-03-17

1988-03-22

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568425, 568495, C07C 4563

Patent

active

047330120

ABSTRACT:
A process for the preparation of 4-chloromethylbenzaldehyde, 4-bromomethylbenzaldehyde and 4-iodomethylbenzaldehyde is disclosed. The desired 4-halomethylbenzaldehyde is prepared by reacting 4-hydroxymethylbenzaldehyde with the appropriate gaseous hydrogen halide and/or with the appropriate aqueous hydrohalic acid. The 4-halomethylbenzaldehydes produced by the disclosed process are useful as raw materials for pharmaceuticals and serve as starting materials for the preparation of conductive organic compounds.

REFERENCES:
patent: 4051168 (1977-09-01), Feiring
patent: 4691062 (1987-09-01), Andrade et al.
Baker, "J. Chem. Sci." (1956), p. 404.
Syper et al., "Synthesis", 1984, p. 747.
Drefahl et al., "Chem. Ber.", vol. 94, p. 907 (1961).
Theilheimer's Synthetic Methods of Organic Chemistry, vol. 39, p. 37, 1985.
Houden-Weyl, "Methoden der Organischen Chemie", vol. V/3, p. 835, 1962.
Patent Abstracts of Japan, vol. 3, No. 147, 1979.

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