Verfahren zur Herstellung von basischen Farbstoffen Gegenstand der Erfindung ist im Verfahren zur Herstellung von basischen Farbstoffen der Formel

摘要

Preparation of basic azo dyes (I) (where D = diazo residue (2-nitrothiazole, thiophene or benzene; R = H or substituted alkyl; A circle negative = anion; R8 = H or hydrocarbon radical; where R', R2 = alkyl or cycloalkyl or together with the neighbouring N form a heterocycle; R3, R4 = H, alkyl, cycloalkyl or acyl, R5, R6, R7 = alkyl, cycloalkyl. B may carry other substituents or R' and R3, R2 and R4, R5 and R6, R5, R6 and R7 with the neighbouring N form a heterocycle. Dyeing and printing of polyacrylics. Mass-dyeing of synthetic fibres, leather and paper. Good light-fastness.