Polycyclic dyes.

摘要

Polycyclic dyes of the formula: <CHEM> wherein: X<1> and X<2> are both H; Z<1> and Z<2> are both O; R<1> and R<2> each independently is H, alkyl, alkenyl, cycloalkyl, aralkyl or aryl; and Ring B carries a methyl group adjacent to NR<1>R<2>; and Ring A is unsubstituted or substituted in the 4-position by an alkyl or alkoxy group and of the formula: <CHEM> wherein: X<1> and X<2> each independently is H, cyano, alkyl, aryl, carbamoyl, sulphamoyl, COOH or carboxylic acid ester; Z<1> and Z<2> each independently is -O-, -S- or -NY- in which Y is H, an optionally-substituted hydrocarbon group or an acyl group; R<1> and R<2> each independently is H or an optionally substituted alkyl, alkenyl, cycloalkyl, aryl or aralkyl group; or R<1> and R<2> together with the N atom to which they are attached, form a heterocycle; R<4> and R<5> each independently is H, halogen or an optionally substituted alkyl, alkenyl or alkoxy group; or R<1> and R<4> together with the N atom and the two carbon atoms in Ring B to which they are attached form a heterocycle fused to Ring B; or R<2> and R<5> together with the N atom and the two carbon atoms in Ring B to which they are attached form a heterocycle fused to Ring B; R<6> is H, halogen, an optionally substituted alkyl or alkoxy group or a group NR<1>R<2> in which each of R<1> and R<2> independently is as hereinbefore defined; R<7> and R<8> each independently is H, halogen or an optionally substituted alkyl, alkenyl or alkoxy group; or R<1> and R<7> together with the N atom and the two carbon atoms in Ring A to which they are attached form a heterocycle fused to Ring A; or R<2> and R<8> together with the N atom and the two carbon atoms in Ring A to which they are attached form a heterocycle fused to Ring A; and where R<6> is NR<1>R<2>, this may be the same as or different from the NR<1>R<2> group present in Ring B. The present polycyclic dyes may be used for the coloration of polyester textile material in shades from green through to reddish-blue.