4-hydroxy-2,3,5-trifluorobenzoic acid and a process for its prep

Details 4-hydroxy-2,3,5-trifluorobenzoic acid and a process for its prep 4-hydroxy-2,3,5-trifluorobenzoic acid and a process for its prep

1993-12-15

1995-08-29

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5900

Patent

active

054461987

ABSTRACT:
The present invention relates to the novel compound 4-hydroxy-2,3,5-trifluorobenzoic acid and to a process for preparing this novel substance by reacting 2,3,4,5-tetrafluorobenzoic acid at elevated temperature with a basic compound dissolved and/or suspended in water, adding, if desired, a fluoride scavenger, bringing the resulting reaction mixture to a pH of 0 to 6 by addition of an acid, and isolating the 4-hydroxy-2,3,5-trifluorobenzoic acid formed.

REFERENCES:
patent: 3413341 (1968-11-01), Bursack et al.
patent: 3459794 (1969-08-01), Tamborski
patent: 5227535 (1993-07-01), Pfirmann et al.
patent: 5292967 (1994-03-01), Papenfuhs et al.
Patent Abstract of Japan, vol. 10, No. 67 (C-333) (2124) Mar. 15, 1986.

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