Primary 2,6-disubstituted para-phenylenediamines and their uses for dyeing keratin fibres

摘要

Paraphenylenediamine compound (I) and their solvates or salts of acids, are new. Paraphenylenediamine compound of formula (I) and their solvates or salts of acids, are new.R1, R2 = 1-6C alkyl (optionally substituted with 1-6C alkyl, OH, NH2, alkyl(1-6C)amino or dialkyl(1-6C)amino or cyclic group like 1-pyrrolidinyl, 1-cyclohexylaminyl, 1-piperazinyl, 1-diazepanyl, 1-morpholinyl or 1-imidazoyl (all optionally with alkyl, OH or NH2)), 1-6C alkoxy, 1-6C monohydroxyalkoxy or 1-6C polyhydroxyalkoxy, carboxylic group or amide group. Provided that (I) is excluding from 2,6-dimethyl-benzene-1,4-diamine, 2,6-diethyl-benzene-1,4-diamine, 2,6-diisopropyl-benzene-1,4-diamine, 2,6-di-tertiary butyl-benzene-1,4-diamine and 2,6-dimethoxy-benzene-1,4-diamine. Independent claims are included for: (1) the preparation of (I); (2) a 4-nitro-phenylamine compounds of formulae (II), (III) and (IV); (3) a composition in a medium for the oxidation dyeing of keratinous fibers comprising (I); (4) a process of coloring the keratinous fibers, particularly human keratinous fibers e.g. hair comprising applying the composition in the presence of air or an oxidizing agent or optionally in the presence of oxidation catalysts; and (5) a device with compartments or dyeing kit with compartments, where first compartment contains the composition and second compartment contains an oxidizing composition. R2-a : 1-4C alkyl (optionally substituted with 1-6C alkoxy, OH, NH2, alkyl(1-6C)amino, dialkyl(1-6C)amino or cyclic ring like 1-pyrrolidinyl, 1-cyclohexylaminyl, 1-piperazinyl, 1-diazepanyl, 1-morpholinyl or 1-imidazoyl (all optionally substituted with alkyl, OH or NH2)), 1-6C alkoxy, 1-6C monohydroxyalkoxy or 1-6C polyhydroxyalkoxy; and R3H or sulfonyl. Provided that: (II) is excluding from 2,6-diethyl-4-nitro-phenylamine, 2-amino-3-ethyl-5-nitro-benzoic acid, 2,6-diisopropyl-4-nitro-phenylamine, 2,6-dimethyl-4-nitro-phenylamine, 2-amino-3-methoxy-5-nitro-benzoic acid, 2-tert-butyl-6-methyl-4-nitro-phenylamine, 2,6-di-tert-butyl-4-nitro-phenylamine, 2,6-dimethoxy-4-nitro-phenylamine, 2-methoxy-6-methyl-4-nitro-phenylamine and 2-amino-3-methyl-5-nitro-benzoic acid; (III) is excluding from 2,6-dimethyl-4-phenylazo-phenylamine, 2,6-diisopropyl-4-phenylazo-phenylamine, 4-(4-amino-3-sec-butyl-5-ethyl-phenylazo)-benzenesulfonic acid, 4-(4-amino-3-tert-butyl-5-methyl-phenylazo)-benzenesulfonic acid and 4-(4-amino-3-isopropyl-5-methyl-phenylazo)-benzenesulfonic acid; and (III) is excluding from 2-methyl-4-nitro-6-pent-1-ynyl-phenylamine. [Image] [Image].