Method of preparing 4-trifluoromethyl-2-nitrobenzoic acid and no

Details Method of preparing 4-trifluoromethyl-2-nitrobenzoic acid and no Method of preparing 4-trifluoromethyl-2-nitrobenzoic acid and no

1987-12-22

1989-07-04

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

562420, 562422, C07C 7946

Patent

active

048452793

ABSTRACT:
An isomer mixture of 4-trifluoromethyl-2-nitrobenzoic acid and 4-trifluoromethyl-3-nitrobenzoic acid, which is a novel compound, is obtained by nitrating a compound represented by ##STR1## (Z is COY or CY.sub.3, and Y is a halogen atom) with a nitrating agent comprising nitric acid and simultaneously hydrolyzing the radical Z. Each of the two isomers is easily isolated by treating the mixture with a basic neutralizing agent to obtain a solution containing the 2-nitro isomer and a precipitate containing the 3-nitro isomer.

REFERENCES:
patent: 3703546 (1972-11-01), Leaper
patent: 3910995 (1975-10-01), Gelfand
patent: 4288615 (1981-09-01), Bright
Chem. Abstr., vol. 64, 3487f (3486h-3488d), 1966.
Chem. Abstr., vol. 49, 3897b (3896g-3998c), 1955.

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