Dyeing composition comprising at least one diaminopyrazole precursor and at least one 6-alcoxy 2,3-diaminopyridine coupler

摘要

Dye composition comprises a 2,3-diaminopyridine coupler (I) and a non-fused pyrazole developer. Dye composition comprises a 2,3-diaminopyridine coupler of formula (I) and a non-fused pyrazole developer. [Image] R1, R4H; 1-6C alkyl optionally substituted with halo, OH, NH2, mono-, di- or tri(1-4C alkyl)amino, aryl, 1-3C alkoxy or heterocyclyl; 6-18C aryl optionally substituted with NH2, OH, 1-3C alkoxy or 1-6C alkyl; 2-6C alkenyl; carboxy(1-6C)alkyl; or 1-6C alkylthio; R22-6C alkyl optionally substituted with halo, OH, NH2, mono-, di- or tri(1-4C alkyl)amino, aryl, 1-3C alkoxy or heterocyclyl; 6-18C aryl optionally substituted with NH2, OH, 1-3C alkoxy or 1-6C alkyl; 2-6C alkenyl; carboxy(1-6C)alkyl; or 1-6C alkylthio; R31-6C alkyl optionally substituted with halo, OH, NH2, mono-, di- or tri(1-4C alkyl)amino, aryl, 1-3C alkoxy or heterocyclyl; 6-18C aryl optionally substituted with NH2, OH, 1-3C alkoxy or 1-6C alkyl; 2-6C alkenyl; carboxy(1-6C)alkyl; or 1-6C alkylthio; alternatively, NR1R2 is a 3- to 18-membered heterocycle optionally substituted with 1-6C alkyl, NH2 or 1-4C hydroxyalkyl. Independent claims are also included for: (1) oxidation dyeing of keratinic fibers by applying the above composition in the presence of an oxidizing agent; (2) multicompartment device comprising the above composition in one compartment and an oxidizing agent in another compartment.