Copper-complex formazan compounds having a fiber-reactive group of the vinylsulfone series, suitable as dyestuffs

摘要

Copper complex formazan compounds of the general formula (1) ##STR1## in which A and B both independently of one another denote a benzene or naphthalene ring, both of which can be substituted by substitutents customary in fiber-reactive dyestuffs, these substituents being, in particular, the groups Z which confer water-solubility and fiber-reactive groups --SO.sub.2 --Y shown in formula (1);P PZ is a group which confers water-solubility, such as a carboxy of sulfo group, and can be bonded to A, B and R;PPm is the number 1, 2, 3 or 4; PPR is an aryl radical, for example phenyl or naphthyl, which can be substituted by one or two groups Z of the above meaning and/or by halogen, lower alkyl and/or lower alkoxy, or is a lower alkyl radical, which can be substituted by halogen, sulfo and/or carboxy; PPthe group --SO.sub.2 --Y can be bonded to A and B;P Pn is the number 1 or 2;PPY is vinyl or an ethyl group, which is substituted in the -position by a substituent which can be eliminated by alkali;PPX is an oxygen atom or a carbonyloxy or sulfo group;PPM is hydrogen or a salt- forming metal, such as an alkali metal.P PThe copper complex formazan compounds of the formula (1) are particularly suitable as fiber-reactive dyestuffs for dyeing materials containing hydroxy groups and/or carboxamide groups, such as, for example, wool and synthetic polyamide fiber materials, and in particular cellulose fiber materials, such as cotton, which they dye in deep fast shades.