Azo dye with a 2,6-diamino-5-cyano-or-5-carbamoyl-pyridine coupling component

A dye of the formula ##STR160## where D.sup.1 is phenyl substituted by chlorine, bromine, trifluoromethyl, methyl, ethyl, methoxy, nitro, cyano, methylsulfonyl, ethylsulfonyl, phenylsulfonyl, carbalkoxy of a total of 2 to 5 carbon atoms, carbo-.beta.-alkoxyethoxy, said alkoxy having 1 to 4 carbon atoms or N,N-dialkyl-substituted sulfamoyl, said alkyl having 1 to 3 carbon atoms;

• phenylazophenyl;
• phenylazophenyl substituted by methyl, chlorine, bromine or nitro;
• benzthiazolyl;
• benzthiazolyl substituted by nitro, cyano, methylsulfonyl or ethylsulfonyl;
• benzisothiazolyl substituted by chlorine, bromine, cyano or nitro;
• thiazolyl substituted by cyano or nitro;
• thienyl substituted by methyl, cyano, nitro or carbalkoxy of a total of 2 to 5 carbon atoms;
• or thiadiazolyl substituted by phenyl, methyl, chlorine, bromine, methylmercapto, ethylmercapto or alkoxycarbonylethylmercapto, said alkoxy having 1 to 4 carbon atoms;
• R.sup.1 is hydrogen or alkyl of 1 to 3 carbon atoms;
• X is carbamoyl or cyano;
• A.sup.3 is hydrogen, alkyl of 1 to 8 carbon atoms;
• alkyl of 2 to 8 carbon atoms substituted by hydroxy, OCHO, OCOCH.sub.3, hydroxyalkoxy of 2 to 4 carbon atoms, cyano, alkoxy of 1 to 8 carbon atoms, phenoxy or phenyl;
• cyclohexyl;
• norbornyl;
• phenyl;
• .beta.-hydroxy-.beta.-phenylethyl;
• or (CH.sub.2).sub.3 (OC.sub.2 H.sub.4).sub.m OT and T is alkyl of 1 to 4 carbon atoms, benzyl or phenyl, m is 1 to 2,
• each A.sup.2, which can be the same or different, is alkyl of 1 to 4 carbon atoms, hydroxyalkyl of 2 or 3 carbon atoms, alkoxyalkyl of 1 to 4 carbon atoms in the alkoxy and 2 or 3 carbon atoms in the alkyl, cyclohexyl or phenyl and ##STR161## is pyrrolidino, piperidino, morpholino, hexamethyleneimino, piperazino, N-methylpiperazino or N-.beta.-hydroxyethylpiperazino.