Process for preparing 4, 5-dichloro-2-methylbenzoic acid

Details Process for preparing 4, 5-dichloro-2-methylbenzoic acid Process for preparing 4, 5-dichloro-2-methylbenzoic acid

1997-04-30

1999-03-23

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

562493, C07C 5116

Patent

active

058862188

ABSTRACT:
The present invention relates to a process for preparing 4,5-dichloro-2-methylbenzoic acid and also its salts in high yields and in high purities by reacting 3,4-dichlorotoluene with acetyl chloride or chloroacetyl chloride in the presence of a Friedel-Crafts catalyst and subsequently oxidizing the acetylated intermediate to give the carboxylic acid.

REFERENCES:
patent: 1930449 (1933-10-01), Brunson
patent: 3236623 (1966-02-01), Klein
patent: 4393232 (1983-07-01), Maurer
patent: 5093529 (1992-03-01), Schmand
patent: 5296636 (1994-03-01), Siegel
patent: 5607898 (1997-03-01), Nakamura
Lutz, et al, J. Organic. Chemistry 12:617 (1947).
Textbook of Organic Chemistry, Carl R. Noller, Second Edition, (1958) p. 166.

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