Process for the preparation of violet dyestuffs of the triphenylmethane series

摘要

A novel process had been found for preparing novel violet dyestuffs of the triphenylmethane series which is characterized by that an aluminum chloride or borotrifluoride or iron-III-chloride-complex compound of a 4,4',4''-trihalogenotriphenylmethylhalide is reacted with phenyl- or naphthylamine which are substituted in the m- or p-position in a molar ratio of 1 to 1.5 at 110 DEG to 135 DEG C and in an inert organic solvent, and the mono-phenyl or -naphthylamino- substituted halide formed is reacted with 5 - 20 mols of an ortho-substituted phenyl- or naphthylamine at 150 DEG to 190 DEG C. The dyestuffs so prepared are well suitable for printing paper and plastics and dyeing polyacrylonitrile fibers.