SUBSTITUTED 2,7-DIOXO-2,7-DIHYDROBENZO(1:2-B; 5,6-B1)DIFURAN OR DIPYRROLE DYESTUFFS, PROCESSES FOR THEIR PREPARATION AND THEIR USE FOR THE COLOURATION OF AROMATIC POLYESTER TEXTILE MATERIALS

摘要

Dyestuffs having the general formula: (I) wherein Z1 and Z2 each independently represent oxygen or in which Y is hydrogen, an optionally substituted hydrocarbon radical or an acyl radical, R1 and R2 each independently represent a substituted or unsubstituted aryl radical, preferably phenyl, and X1 and X2 each independently represent hydrogen, halogen, cyano, alkyl, alkoxy, nitro, amino, substituted amino, carboxylic acid, carboxylic acid ester, optionally substituted carbamoyl, alkylthio, arylthio, alkylsulphonyl, arylsulphonyl, acyl, acyloxy, hydroxy, sulphonic acid or sulphonic acid ester, or X1 and X2 together form a 5- or 6-membered, carbocyclic or heterocyclic, saturated or unsaturated, including aromatic, ring which may carry further substituents; processes for the manufacture of these dyestuffs and their use for coloring aromatic polyester textile materials.