NEW AZO DYESTUFFS AND PROCESSES FOR THEIR MANUFACTURE AND USE

1277090 Basic azo dyestuffs CIBA-GEIGY AG 30 May 1969 [31 May 1968] 27444/69 Heading C4P The invention comprises basic azo dyestuffs of general formula and their tantomers, wherein D is a diazo component residue which may contain an azo group and contains at least one amino, hydrazino, or etherified hydroxylamino group that may be quaternated, the dyes being free from acidic groups imparting solubility in water. D is preferably a benze, naphthalene or at most bicyclic heterocyclic radical, the amino, hydrazino or etherified hydroxylamino group being linked thereto via a carbon chain optionally interrupted by a hetero-atom or which forms part of a ring. They are prepared by (a) reacting an azo compound with an amine, hydrazine or etherified hydroxylamine, (b) diazotizing an amine D-NH 2 and coupling to 2,6-dihydroxy- 3-cyano-4-methyl pyridine, or (c) quaternizing an unquaternated azo compound. The dyes dye wool, mordanted cotton and synthetic materials in yellow, orange and red shades.