Tri:aryl methane dyestuff cpds. with sulphonated benzene ring - useful in printing ink and for toning carbon black

摘要

New triarylmethane dyestuffs (I) with a sulphonated benzene ring are of formula (I). In (I) R has formula (II) or (III) R1, R2, R4, R6 and R7 are H, Me or Et, R3 is H, Me, Et or Ph and R5 is Me, Et, Ph, tolyl, methoxyphenyl or ethoxyphenyl. If R1 and R2 are not H, -NR3R4 is -NH2; if -NR3R4 is NEt2, R is not -Q-NMe-Ph (Q is o-phenylene); and if R1 and R2 are H and R is -Q-NH2 or -Q-NH-Ph, no. -NR3R4 is NH2 or -NHPh. (I) are used in printing inks or for toning C black. They are also useful in carbon paper. They are violet to greenish-blue in colour and insoluble in water. (I) can be prepd. by conventional methods, e.g. condensn. of 4,4'-aminobenzophenone with aniline or alpha-naphthylamine and sulphonation, if necessary.