Substituted 2-chloro-3,4,5-trifluorobenzenes and a process for t

Details Substituted 2-chloro-3,4,5-trifluorobenzenes and a process for t Substituted 2-chloro-3,4,5-trifluorobenzenes and a process for t

1995-05-05

1996-10-15

Gerstl, Robert

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

Organic compounds

Amino nitrogen containing

558425, 570127, C07C21145

Patent

active

055656129

ABSTRACT:
The present invention relates to substituted 2-chloro-3,4,5-trifluorobenzenes of the formula ##STR1## in which R is NO.sub.2, NH.sub.2, CN or Cl, and to a process for the preparation of substituted 2-chloro-3,4,5-trifluorobenzenes of the formula given above, in which R is NO.sub.2, NH.sub.2, CN, Cl or Br, which involves reacting 2,3,4-trifluorochlorobenzene with a nitrating agent in the presence or absence of a water-insoluble solvent at from -10.degree. C. to 50.degree. C., reducing 2-chloro-3,4,5-trifluoronitrobenzene or a mixture which contains 2-chloro-3,4,5-trifluoronitrobenzene and 5-chloro-2,3,4-trifluoronitrobenzene, in the presence of an organic solvent, isolating 2-chloro-3,4,5-trifluoroaniline or a mixture which contains 2-chloro-3,4,5-trifluoroaniline and 5-chloro-2,3,4-trifluoroaniline, diazotizing this product, if desired, and exchanging the diazotized group for a chloride atom, bromide atom or cyanide radical.

REFERENCES:
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Chemical Abstracts, vol. 117, No. 23, Dec. 7, 1992, Preparation of 2-chloro-3,4,5-trifluorobenzoic acids, 233606b.
Wray, et al.; J.C.S. Perkin II (1976), pp. 1307-1312.
C.A., 18525d (1966) vol. 65, Imperial Smelting Corp.

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