Succinimido azo dyestuffs

A water-insoluble azo dyestuff of the formula ##SPC22##

• in which A represents phenyl or phenyl substituted by chloro, bromo, hydroxyl, cyan, thiocyanato, nitro, alkyl of 1 to 2 carbon atoms, trifluoromethyl, alkoxy of 1 to 2 carbon atoms, formyl, acetyl, propionyl, benzoyl, methylbenzoyl, (methyl or ethyl) oxycarbonylbenzoyl, acetylamino, propionylamino, benzoylamino, methoxycarbonylamino, ethoxycarbonylamino, methylsulfonyl, ethylsulfonyl, propylsulfonyl, chloromethylsulfonyl, aminosulfonyl, alkylated aminosulfonyl containing 1 to 2 carbon atoms, (hydroxyethyl)-aminosulfonyl, cyanoethylaminosulfonyl, .beta.-chloroethylsulfonylamino, cyclohexylaminosulfonyl, phenylaminosulfonyl, (chloro-, methyl-, nitro- or methoxy-phenyl) aminosulfonyl, benzylaminosulfonyl, N-piperidylsulfonyl, N-morpholinosulfonyl, alkylsulfonyloxy containing 1 to 3 carbon atoms, ethoxyethylsulfonyloxy, cyclohexylsulfonyloxy, chloromethylsulfonyloxy, cyanethylsulfonyloxy, phenylsulfonyloxy, chlorophenylsulfonyloxy, aminosulfonyloxy, alkylaminosulfonyloxy containing 1 to 4 carbon atoms, phenylaminosulfonyloxy, N-phenyl-N-ethyl-aminosulfonyloxy, phenyl, acetylaminophenyl, trimethylammonium, phenoxy, phenylazo or nitrophenylazo, R.sub.1 is hydrogen, alkyl containing 1 to 10 carbon atoms or alkyl containing 1 to 10 carbon atoms substituted by a member selected from the group consisting of chlorine, bromine, phenyl, alkanoyloxy of 1 to 10 carbon atoms, alkanoylamino of 1 to 10 carbon atoms, hydroxy, cyano, alkoxy of 1 to 4 carbon atoms, benzoyl, cyanethoxy, alkylcarbamoyl where the alkyl contains 2 to 7 carbon atoms, aminocarbonyl and alkyloxycarbonyloxy in which alkyl contains 2 to 7 carbon atoms, R.sub.2 is alkyl containing 1 to 10 carbon atoms or alkyl containing 1 to 10 carbon atoms substituted by a member selected from the group consisting of chlorine, bromine, phenyl, alkanoyloxy of 1 to 10 carbon atoms, hydroxy, cyano, alkylcarbamoyl in which alkyl contains 2 to 7 carbon atoms, aminocarbonyl and alkyloxycarbonyloxy in which alkyl contains 2 to 7 carbon atoms, alkoxy of 1-4 carbon atoms, benzoyl and cyanethoxy, R.sub.3 represents --CH.sub.2 --X.sub.1 --CH.sub.2 -- wherein X.sub.1 is a direct bond, a double bond, --CH.sub.2 --, --O--, --S--, --NH--, --N(CH.sub.3)--, or ##EQU3## where R' and R" are hydrogen or a group as defined below and where one or both of R' and R" is chlorine, an alkyl radical of between 1 to 12 carbon atoms, ##SPC23##
• wherein Y is chlorine, alkyl of 1 to 3 carbon atoms, alkoxy of 1 to 3 carbon atoms, nitro or NH.sub.2 and n = 1, 2 or 3, and X represents hydrogen, alkyl of up to 3 carbon atoms, alkoxy of up to two carbon atoms, phenoxy or phenylmercapto.