Patent ID: 7175670

Claim:
A dye composition comprising, in a medium that is suitable for dyeing: at least one oxidation base, and at least one 2,3,5-triaminopyridine coupler of formula (I), or a corresponding addition salt thereof: wherein: R 1 is chosen from: a halogen atom; a C 1 –C 4 alkyl radical optionally substituted with at least one radical chosen from hydroxyl, carboxyl, (C 1 –C 4 ) alkoxycarbonyl, carboxamido, C 1 –C 4 alkylsulphonyl, C 1 –C 4 alkoxy, C 1 –C 4 alkylsulphonamido and NR 3 R 4 radicals a carboxyl radical; a (C 1 –C 4 )alkoxycarbonyl radical; a carboxamido radical; a (C 1 –C 4 )alkylcarboxamido radical; a sulphinic radical; a C 1 –C 4 alkylsulphonyl radical; a C 1 –C 4 alkylsulphonamido radical; a hydroxyl radical; a C 1 –C 4 alkoxy radical; a C 2 –C 4 hydroxyalkoxy radical; a radical chosen from amino, monoaminoalkoxy and diaminoalkoxy radicals; a C 1 –C 4 thioether radical; a C 1 –C 4 alkylsulphoxy radical; a sulphonic radical; and a radical NR 5 R 6 ; R 3 , R 4 , R 5 and R 6 , which may be identical or different, are chosen from a hydrogen atom; a C 1 –C 4 alkylsulphonyl radical; a (C 1 –C 4 ) alkylcarbonyl radical in which the alkyl radical may be substituted with at least one hydroxyl radical; an arylcarbonyl radical, the aryl radical possibly being substituted with a radical chosen from hydroxyl, C 1 –C 4 alkoxy, amino and (di)(C 1 –C 4 )alkylamino; a carboxamido radical; a C 1 –C 4 alkyl radical optionally substituted with at least one radical chosen from hydroxyl, C 1 –C 4 alkoxy, C 1 –C 4 alkylsulphonyl, C 1 –C 4 alkylsulphonamido, carboxyl, carboxamido, C 1 –C 4 alkylsulphoxy, amino, (di)(C 1 –C 4 )alkylamino and C 2 –C 4 (poly)hydroxyalkylamino radicals; R 2 is chosen from a hydrogen atom, a C 1 –C 4 alkoxy radical optionally substituted with at least one radical chosen from hydroxyl and C 1 –C 2 alkoxy radicals, n ranges from 0 to 7, m is 0, 1 or 2, Y is chosen from an oxygen atom, a radical C(R 8 ) 2 and a radical NR 7 in which R 7 has the same meaning as R 3 , and R 8 , which may be identical or different, is chosen from a hydrogen atom or has the same meaning as R 1 .