Process for the preparation of 2,3,5,6-tetrafluorobenzoic acid,

Details Process for the preparation of 2,3,5,6-tetrafluorobenzoic acid, Process for the preparation of 2,3,5,6-tetrafluorobenzoic acid,

1987-06-11

1988-07-05

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

260544F, 260544D, C07C 51255

Patent

active

047556218

ABSTRACT:
2,3,5,6-Tetrafluorobenzoic acid is prepared from 4-trifluoromethyl-benzoyl fluoride by chlorination, fluorination, hydrolysis, decarboxylation and saponification. The new compounds 2,3,5,6-tetrachloro-4-trifluoromethyl-benzoyl chloride and 2,3,5,6-tetrafluoro-4-trifluoromethyl-benzoyl fluoride are produced during this as intermediates.

REFERENCES:
patent: 3459794 (1969-08-01), Tamborski
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Gerasimova, T. et al, Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Khim Nauk (5) 100-6, 1975.
R. J. Harper, Jr., E. J. Soloski and C. Tamborski, J. Org. Chem., 29, 2385-2389 (1964).
V. I. Vysochin, V. A. Barkhash and N. N. Vorozhtsov, Zh. Obsh. Chim., 39, 1607-1615 (1969).
G. G. Yakobson, G. G. Furin and T. V. Terent'eva, Zh. Org. Khim., 10, 799-804 (1974).
D. J. Alsop, J. Burdon and J. C. Tatlow, J. Chem. Soc., 1801-1805 (1962).

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