Process for producing 3,5-difluoraniline

Details Process for producing 3,5-difluoraniline Process for producing 3,5-difluoraniline

1994-02-08

1995-03-21

Hollrah, Glennon H.

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

Organic compounds

Amino nitrogen containing

564442, C07C20974

Patent

active

053997670

ABSTRACT:
A process for producing 3,5-difluoroaniline, which comprises reacting a benzonitrile compound of the formula (I): ##STR1## wherein each of X.sub.1, X.sub.2 and X.sub.3 is hydrogen, chlorine, bromine or a cyano group, provided that at least one of X.sub.1 to X.sub.3 is a cyano group, with a mineral acid for hydrolysis and decarboxylation to obtain an aniline compound of the formula (II): ##STR2## wherein each of X.sub.4, X.sub.5 and X.sub.6 is hydrogen, chlorine or bromine, provided that at least one of X.sub.4 to X.sub.6 is hydrogen, and in the case of a compound of the formula (II) wherein X.sub.4, X.sub.5 and X.sub.6 are not simultaneously hydrogen, reacting such a compound with hydrogen in a presence of a catalyst for reduction to obtain 3,5 -difluoroaniline.

REFERENCES:
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patent: 4618686 (1986-10-01), Boyer
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patent: 5068392 (1991-11-01), McKendry et al.
patent: 5089653 (1992-02-01), Pews et al.
patent: 5162584 (1992-11-01), Moilliet et al.
patent: 5336808 (1994-08-01), Krishnamurti et al.
Chemical Abstracts, vol. 66, No. 15, Apr. 10, 1967, abstract No. 65202z, p. 6118, N. Ishikawa, et al., "2,4,6-Trichloro-3,5-Difluoroaniline and its Derivatives".

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