| abstract |
Dyestuffs of the formula <IMAGE> wherein R1, R2, R denote H, alkyl, alkenyl, cycloalkyl, aralkyl etc. R3, R4 denote H, alkyl, aralkyl, aryl, alkoxy, halogen, CN, COOH, alkoxycarbonyl, alkylsulfonyl, arylsulfonyl etc. Z denotes O, S or -N(R)-, p and q denote 0 or 1, but not simultaneously 0 and G stands for the remaining members of a ring system, with the proviso that R3 is not alkyl if G is a thiazole ring, are outstanding suitable for dyeing fibre materials of all kinds in clear yellow to violet shades with good fastness properties. |