Ein neues Prinzip zur Herstellung von Anthrachinon- und anellierten Naphthazarinfarbstoffen

Abstract

Most anthraquinone dyes have been produced from 1-aminoanthraquinone, quinizarin, 1,4,5,8-tetrahydroxy- or 1,4,5,8-diamino-dihydroxyanthraquinones as starting materials. A new approach, that allows extension of the hitherto known color range, consists in transforming naphthazarindiene-adducts by a one step synthesis into known and new anthraquinone and tricyclic naphthazarin dyestuffs. The reaction mechanism is given. The many new, especially green dyestuffs have excellent fastness properties.