Photochlorination of aromatic compounds in the side chain

Details Photochlorination of aromatic compounds in the side chain Photochlorination of aromatic compounds in the side chain

1986-11-06

1987-08-25

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

562493, 20415789, C07C 6976

Patent

active

046894250

ABSTRACT:
A process for photochlorinating aromatic compounds in the side chain and, in particular, a process for the selective chlorination of a 2-alkyl group of 2-alkyl benzoic acid or ester is disclosed. In this process, hydrogen chloride is added to the benzoic acid or ester prior to adding chlorine in the presence of actinic radiation at a reaction temperature below the decomposition temperature of the resulting chlorinated acid or ester. A typical aromatic compound is methyl 2-methylbenzoate and the reaction is preferably carried out at a temperature ranging from about -20.degree. C. to 20.degree. C.

REFERENCES:
patent: 3109799 (1963-11-01), Katzschmann
patent: 3113084 (1963-12-01), Blardenelli
patent: 3152055 (1964-10-01), Katzschmann
patent: 3230268 (1966-01-01), Kobayashi et al.
patent: 3704215 (1972-11-01), Bockmann
patent: 4172098 (1979-10-01), Scheuermann et al.
CA 58, 4574h, Helv. Chim. Acta 45 (1860-1870), 1962.

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