| abstract |
The invention concerns azo compounds of the formula I <IMAGE> where R1 is hydrogen, chlorine, bromine or iodine, preferably chlorine or bromine, R2 is hydrogen, chlorine or bromine, preferably hydrogen, R3 is C1-4alkylcarbonyl, C1-4alkoxycarbonyl, C1-4alkoxyethoxycarbonyl, C1-2alkoxyethoxyethoxycarbonyl or C1-2alkylsulphonyl, and R4 is cyano-C2-3alkyl or gamma -chloroallyl, the preparation thereof and the use thereof for dyeing hydrophobic fibre materials. |