Patent ID: 7531009

Claim:
6-azo-5,5′-dihydroxy-7,7′-disulfo-2,2′-dinaphthylamine derivatives of formula in which a is 1-4 n is 0 or 1, R 3 represents hydrogen, C 1-4 -alkyl, C 3-4 -cycloalkyl, aralkyl, phenyl, C 1-4 -alkoxy, sulfo, hydroxy, nitro, halogen, C 1-4 -alkylcarbonyl, carboxy, carbamoyl, C 1-4 -alkoxy-carbonyl, C 1-4 -alkylaminocarbonyl, cyano, amino, ureido or NHCOC 1-4 -alkyl, whereby C 1-4 -alkyl and C 1-4 -alkoxy may be substituted with hydroxy or C 1-4 -alkoxy, and phenyl may be substituted with C 1-4 -alkyl, C 1-4 -alkoxy, sulfo, hydroxy, nitro, halogen or carboxy, and A 1 if n is 1 is selected from the group consisting of in which m, p and q are identical or different, and are 0, 1 or 2, R 5 and R 6 are identical or different and represent hydrogen, C 1-4 -alkyl, C 3-6 -cycloalkyl, aralkyl, phenyl, C 1-4 -alkoxy, sulfo, hydroxy, nitro, halogen, C 1-4 -alkylcarbonyl, carboxy, carbamoyl, C 1-4 -alkoxycarbonyl, C 1-4 -alkylaminocarbonyl, cyano, amino, ureido or NHCOC 1-4 -alkyl, whereby C 1-4 -alkyl and C 1-4 -alkoxy may be substituted with hydroxy or C 1-4 -alkoxy, and phenyl may be substituted with C 1-4 -alkyl, C 1-4 -alkoxy, sulfo, hydroxy, nitro, halogen or carboxy, and A 1 if n is 0 is R 2 represents H or in which w is 0 or 1, R 7 and R 8 are identical or different and represent hydrogen, C 1-4 -alkyl, C 3-6 -cycloalkyl, aralkyl, phenyl, C 1-4 -alkoxy, sulfo, hydroxy, nitro, halogen, C 1-4 -alkylcarbonyl, carboxy, carbamoyl, C 1-4 -alkoxycarbonyl, C 1-4 -alkylaminocarbonyl, cyano, amino, ureido or NHCOC 1-4 -alkyl, whereby C 1-4 -alkyl and C 1-4 -alkoxy may be substituted with hydroxy or C 1-4 -alkoxy, and phenyl may be substituted with C 1-4 -alkyl, C 1-4 -alkoxy, sulfo, hydroxy, nitro, halogen or carboxy, and A 2 represents either A 1 , whereby A 1 has the meaning as indicated for the 6-azo-5,5′-di-hydroxy-7,7′-disulfo-2,2′-dinaphthylamine derivatives of the claimed formula (1), or A 2 represents in which R 9 and R 10 are identical or different and represent hydrogen, C 1-4 -alkyl, C 1-4 -alkoxy, sulfo, hydroxy, nitro or carboxy, E represents sulfur or NH.