Process for preparing trifluoromethylanilines

Details Process for preparing trifluoromethylanilines Process for preparing trifluoromethylanilines

1994-08-18

1995-11-28

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

564394, 564415, 558418, 558420, C07C20922

Patent

active

054710022

ABSTRACT:
A process for preparing trifluoromethylanilines of the formula (I), ##STR1## in which R.sup.1 and R.sup.2, independently of each other, are hydrogen, halogen, (C.sub.1 -C.sub.4) alkyl, hydroxyl, alkoxy, alkylthio, carboxyl, or a nitro or cyano group, by reacting compounds of the formula (II) ##STR2## in which X.sub.1, X.sub.2 and X.sub.3 are in each case, identically or differently, halogen atoms,
a is 0 or 1,
Y is fluorine, chlorine or bromine, and
R.sup.1 and R.sup.2 have the defined meaning, with anhydrous hydrofluoric acid, and converting the resulting aniline hydrofluorides with a base into the free amines.

REFERENCES:
patent: 4481370 (1984-11-01), Lin et al.
patent: 4748277 (1988-05-01), Desbois
European Search Report No. 94112737, Dec. 19, 1994.
Journal of Fluorine Chemistry, vol. 52, No. 2, Apr. 15, 1991, pp. 107-116.

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