M-aminophenol derivatives and coloring agents containing them

1. An agent for coloring keratin fibers based on a developer-coupler combination, said agent containing, as the coupler, at least one 3-aminophenol derivative of formula (I), or a physiologically compatible, water-soluble salt thereof:

wherein R denotes an aromatic, heterocyclic 5-membered ring of formula (Ia):

wherein X1, X1, X3, and X4, independently of each other, denote sulfur, nitrogen, N—R1, oxygen, C—R2, C—R3, C—R4, or C—R5, provided that at least one and at the most three of the X1 to X4 groups denote nitrogen, N—R1, sulfur, or oxygen and, if there are at least two heteroatoms in formula (Ia), at the most one of the X1 to X4 groups denotes sulfur, N—R1, or oxygen;

R1 denotes hydrogen, a (C 1 –C 6 )-alkyl group, a phenyl group, a (C 2 –C 4 )-hydroxy-alkyl group, or an acetyl group;

R2, R3, R4, and R5, independently of each other, denote hydrogen, a halogen atom, a cyano group, a (C 1 –C 6 )-alkyl group, a (C 1 –C 4 ) -alkoxy group, a (C 1 –C 4 )-alkyl thioether group, a mercapto group, a nitro group, an amino group, a (C 1 –C 4 )-alkylamino group, a di(C 1 –C 4 )-alkylamino group, a hydroxy-(C 2 –C 4 )-alkylamino group, a di[hydroxy-(C 2 –C 4 )-alkyl] amino group, a [di-hydroxy-(C 3 –C 4 )-alkyl]amino group, a trifluoromethyl group, a —C(O)CH 3 group, a C(O)CF 3 group, a —C(O)H group, a —Si(CH 3 ) group, a (C 1 –C 4 )-hydroxyalkyl group, or a (C 2 –C 4 )-dihydroxyalkyl group.

2. The agent as defined In claim 1 , wherein said at least one 3-amino-phenol derivative is selected from the group consisting of 5-amino-2-(3-thienyl)-phenol, 5-amino-2-(3-furyl)phenol, 5-amino-2-(pyrrol-3-yl)phenol, 5-amino-2-(1-methyl-1H-pyrrol-3-yl)-phenol, 5-amino-2-(1,3-thiazol-2-yl)-phenol, 5-amino-2-(1,3-thiazol-5-yl)-phenol, 5-amino-2-(2-thienyl)-phenol, 5-amino-2-(2-furyl)-phenol, 5-amino-2-(pyrrol-2-yl)-phenol, 5-amino-2-(1-methyl-1H-pyrrol-2-yl)-phenol, 5-amino-2-(2-chloro-3-thienyl)-phenol, 5-amino-2-(2-methyl-3-thienyl)-phenol, 5-amino-2-(2-nitro-3-thienyl)-phenol, 5-amino-2-(2-amino-3-thienyl)-phenol, 5-amino-2-(2-acetyl-3-thienyl)-phenol, 5-amino-2-(2-formyl-3-thienyl)-phenol, 5-amino-2-(4-chloro-3-thienyl)-phenol, 5-amino-2-(4-methyl-3-thienyl)-phenol, 5-amino-(4-nitro-3-thienyl)-phenol, 5-amino-2-(4-amino-3-thienyl)-phenol, 5-amino-2-(4-acetyl-3-thienyl)-phenol, 5-amino-2-(4-formyl-3-thienyl)-phenol, 5-amino-2-(5-chloro-3-thienyl)-phenol, 5-amino-2-(5-methyl-3-thienyl)-phenol, 5-amino-2-(5-nitro-3-thienyl)-phenol, 5-amino-2-(5-acetyl-3-thienyl)-phenol, 5-amino-2-(5-amino-3-thienyl)-phenol, 5-amino-2-(5-formyl-3-thienyl)-phenol, 5-amino-2-(5-formyl-3-furyl)-phenol, 5-amino-2-(3-chloro-2-thienyl)-phenol, 5-amino-2-(3-methyl-2-thienyl)-phenol, 5-amino-2-(3-nitro-2-thienyl)-phenol, 5-amino-2-(3-amino-2-thienyl)-phenol, 5-amino-2-(3-acetyl-2-thienyl)-phenol, 5-amino-2-(3-formyl-2-thienyl)-phenol, 5amino-2-(4-chloro-2-thienyl)-phenol, 5-amino-2-(4-methyl-2-thienyl)-phenol, 5-amino-2-(4-nitro-2-thienyl)-phenol, 5-amino-2-(4-amino-2-thienyl)-phenol, 5-amino-2-(4-acetyl-2-thienyl)-phenol, 5-amino-2-(4-formyl-2-thienyl)-phenol, 5-amino-2-(5-chloro-2thienyl)-phenol, 5-amino-2-(5-methyl-2-thienyl)-phenol, 5-amino-2-(5-nitro-2-thienyl)-phenol, 5-amino-2-(5-amino-2-thienyl)-phenol, 5-amino-2-(5-acetyl-2-thienyl)-phenol, 5-amino-2-(5-formyl-2-thienyl)-phenol, 5-amino-2-(5-formyl-2-furyl)-phenol, 5-amino-2-(5-nitro-1,3-thiazol-2-yl)-phenol, 5-amino-2-(5-amino-1,3-thiazol-2-yl)-phenol, 5-amino-2-(2-nitro-1,3-thiazol-5-yl)-phenol, 5-amino-2-(2-amino-1,3-thiazol-5-yl)-phenol, 5-amino-2-(3,5-dimethyl-1H-pyrazol-4-yl)-phenol, and 5-amino-2-(5-nitro-4H-1,2,4-triazol-3-yl)-phenol.

3. The agent as defined in claim 1 , wherein in said at least one 3-amino-phenol derivative of the formula (I) (i) X2 denotes sulfur and X1 X3, and X4 denote C—R2, C—R4, and C—R5 or (ii) X1 denotes sulfur and X2, X3, and X4 denote C—R3, C—R4 and CR5.

4. The agent as defined in claim 1 , wherein said at least one 3-amino-phenol derivative is selected from the group consisting of 5-amino-2-(3-thienyl)-phenol, 5-amino-2-(2- chloro-3-thienyl)-phenol, and 5-amino-2-(5-chloro-2-thienyl)-phenol.

5. The agent as defined in claim 1 , containing from 0.005 to 20 weight percent of said at least one 3-aminophenol derivative.

6. The agent as defined in claim 1 , wherein the developer is selected from the group consisting of 1,4-diaminobenzene; 1,4-diamino-2-methylbenzene; 1,4-diamino-2, 6-dimethylbenzene; 1,4-diamino-3,5-diethylbenzene; 1,4-diamino-2,5-dimethylbenzene; 1,4-diamino-2,3-dimethylbenzene; 2-chloro-1,4-diamino-benzene; 1,4-diamino-2-(thiophen-2-yl)benzene; 1,4-diamino-2-(thiophen-3-yl)-benzene; 1,4-diamino-2-(pyridin-3-yl)-benzene; 2,5-diaminobiphenyl; 1,4-diamino-2-methoxymethylbenzene; 1,4-diamino-2-aminomethylbenzene; 1,4-diamino-2-hydroxymethylbenzene; 1,4-diamino-2-(2-hydroxyethoxy)benzene; 2-[2-(acetyl-amino)ethoxy]-1,4-diaminobenzene; 4-phenylaminoaniline; 4-dimethylamino-aniline; 4-diethylaminoaniline; 4-dipropylaminoaniline; 4-[ethyl-(2-hydroxyethyl)-amino]-aniline; 4-[di(2-hydroxyethyl)amino]-aniline; 4-[di(2-hydroxyethyl)amino]-2-methylaniline; 4-[(2-methoxyethyl)amino]-aniline; 4-[(3-hydroxypropyl)-amino]-aniline; 4-[(2,3-dihydroxypropyl)amino]aniline; 1,4-diamino-2-(1-hydroxyethyl)-benzene; 1,4-diamino-2-(2-hydroxyethyl)benzene; 1,4-diamino-2-(1-methylethyl)-benzene; 1,3-bis-[(4-amino-phenyl)(2-hydroxyethyl)amino]-2-propanol; 1,4-bis-[(4-am inophenyl)amino]-butane; 1,8-bis-(2,5-diaminophenoxy)-3,6-dioxaoctane; 4-aminophenol; 4amino-3-methylphenol; 4-amino-3-(hydroxymethyl)phenol; 4-amino-3-fluorophenol; 4-methylaminophenol; 4-amino-2-(aminomethyl)-phenol; 4-amino-2-(hydroxymethyl)-phenol; 4-amino-2-fluorophenol; 4-amino-2-[(2-hydroxyethyl(amino]-methylphenol; 4-amino-2-methylphenol; 4-amino-2-(methoxymethyl)-phenol; 4-amino-2-(2-hydroxyethyl)-phenol; 5-aminosalicylic acid; 2,5-diaminopyridine; 2,4,5,6-tetraaminopyrimidine; 2,5,6-triamino-4-(1H)-pyrimidone; 4,5-diamino-1-(2-hydroxyethyl)-1H-pyrazole; 4,5-diamino-1-(1-methylethyl)-1H-pyrazole; 4,5-diamino-2-[(4-methylphenyl)methyl]-1H-pyrazole; 1-[(4-chlorophenyl)methyl]-4,5-diamino-1H-pyrazole; 4,5-diamino-1-methyl-1H-pyrazole; 2-aminophenol; 2-amino-6-methylphenol; 2-amino-5-methylphenol; and 1,2,4-trihydroxybenzene.

7. The agent as defined in claim 1 , further comprising at least one additional coupler besides said at least one 3-amino-phenol derivative, and wherein said at least one additional coupler is selected from the group consisting of N-(3-dimethylaminophenyl)urea, 2,6-diaminopyridine, 2-amino-4-[(2-hydroxy-ethyl)amino]anisole, 2,4-diamino-1-fluoro-5-methylbenzene, 2,4-diamino-1-methoxy-5-methylbenzene, 2,4-diamino-1-ethoxy-5-methylbenzene, 2,4-diamino-1-(2-hydroxyethoxy)-5-methylbenzene, 2,4-di[(2-hydroxyethyl)-amino]- 1,5-dimethoxybenzene, 2,3-diamino-6-methoxypyridine, 3-amino-6-methoxy-2-(methylamino)-pyridine, 2,6-diamino-3,5-dimethoxypyridine, 3,5-diamino-2,6-dimethoxypyridine, 1,3-diaminobenzene, 2,4-diamino-1-(2-hydroxyethoxy)-benzene, 1,3-diamino-4-(2,3-dihydroxypropoxy)-benzene, 1,3-diamino-4-(3-hydroxypropoxy)-benzene, 1,3-diamino-4-(2-methoxyethoxy)-benzene, 2,4-diamino-1,5-di(2-hydroxyethoxy)-benzene, 1-(2-aminoethoxy)-2,4-diaminobenzene, 2-amino-1-(2-hydroxyethoxy)-4-methylaminobenzene, 2,4-diaminophenoxyacetic acid, 3-[di(2-hydroxyethyl)amino]aniline, 4-amino-2-di[(2-hydroxyethyl)amino]-1-ethoxybenzene, 5-methyl-2-(1-methylethyl)phenol, 3-[(2-hydroxyethyl)amino]-aniline, 3-[(2-aminoethyl)amino]-aniline, 1,3-di-(2,4-diaminophenoxy)-propane, di(2,4-diaminophenoxy)-methane, 1,3-diamino-2,4-dimethoxybenzene, 2,6-bis-[(2-hydroxyethyl)amino]-toluene, 4-hydroxyindole, 3-dimethylaminophenol, 3-diethylaminophenol, 5-amino-2-methylphenol, 5-amino-4-fluoro-2-methylphenol, 5-amino-4-methoxy-2-methylphenol, 5-amino-4-ethoxy-2-methylphenol, 3-amino-2,4-dichlorophenol, 5-amino-2,4-dichloro-phenol, 3-amino-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 3-amino-phenol, 2-[(3-hydroxyphenyl)amino]-acetamide, 5-[(2-hydroxyethyl)amino]-4-methoxy-2-methylphenol, 5-[(2-hydroxyethyl)amino]-2-methylphenol, 3-[(2-hydroxyethyl)amino]-phenol, 3-[(2-methoxyethyl)amino]-phenol, 5-amino-2-ethylphenol, 5-amino-2-methoxyphenol, 2-(4-amino-2-hydroxyphenoxy)-ethanol, 5-[(3-hydroxypropyl)amino]-2-methylphenol, 3-[(2,3-dihydroxypropyl)-amino]-2-methylphenol, 3-[(2-hydroxyethyl)amino]-2-methylphenol, 2-amino-3-hydroxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 5-amino-4-chloro-2-methylphenol, 1-naphthol, 2-methyl-1-naphthol, 1,5-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 2,3-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 2-methyl-1-naphthol acetate, 1,3-dihydroxybenzene, 1-chloro-2,4-dihydroxy-benzene, 2-chloro-1,3-dihydroxybenzene, 1,2-dichloro-3,5-dihydroxy-4-methyl-benzene, 1,5-dichloro-2,4-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 3,4-methylenedioxyphenol, 3,4-methylenedioxyaniline, 5-[(2-hydroxyethyl)amino]-1,3-benzodioxole, 6-bromo-1-hydroxy-3,4-methylenedioxybenzene 3,4-diamino-benzoic acid, 3,4-dihydro-6-hydroxy-1,4(2H)-benzoxazine, 6-amino-3,4-dihydro-1,4(2H)benzoxazine, 3-methyl-1-phenyl-5-pyrazolone, 5,6-dihydroxyindole, 5,6-dihydroxyindoline, 5-hydroxyindole, 6-hydroxyindole, 7-hydroxyindole, and 2,3-indolinedione.

8. The agent as defined in claim 1 , containing from 0.005 to 20 weight percent of the coupler and from 0.005 to 20 weight percent of the developer, based on a total amount of the agent.

9. The agents as defined In claim 1 , further comprising at least one direct dye compound.

10. The agent as defined in claim 1 , having a pH of from 6.5 to 11.5.

11. The agent as defined in claim 1 , consisting of a hair colorant.

12. A ready-to-apply agent for oxidative dyeing of keratin fibers, which, in a medium appropriate for dyeing, contains at least one developer, at least one coupler, and at least one oxidant, wherein said at least one coupler comprises at least one 3-aminophenol derivative of formula (I), or a physiologically compatible, water-soluble salt thereof:

wherein R denotes an aromatic, heterocyclic 5-membered ring of formula (Ia):

wherein X1, X2, X3, and X4, independently of each other, denote sulfur, nitrogen, N—R1, oxygen, C—R2, C—R3, C—R4, or C—R5, provided that at least one and at the most three of the X1 to X4 groups denote nitrogen, N—R1, sulfur, or oxygen and, if there are at least two heteroatoms in formula (Ia), at the most one of the X1 to X4 groups denotes sulfur, N—R1, or oxygen;

R1denotes hydrogen, a (C 1 –C 6 )-alkyl group, a phenyl group, a (C 2 –C 4 -hydroxy-alkyl group, or an acetyl group;

R2, R3, R4, and R5, independently of each other, denote hydrogen, a halogen atom, a cyano group, a (C 1 –C 6 )-alkyl group, a (C 1 –C 4 )-alkoxy group, a (C 1 –C 4 )-alkyl thioether group, a mercapto group, a nitro group, an amino group, a (C 1 –C 4 )-alkylamino group, a di(C 1 –C 4 )-alkylamino group, a hydroxy-(C 2 –C 4 )-alkylamino group, a di[hydroxy-(C 2 –C 4 )-alkyl]amino group, a [di-hydroxy-(C 2 –C 4 )-alkyl]amino group, a trifluoromethyl group, a —C(O)CH 3 group, a C(O)CF 3 group, a —C(O)H group, a —S(O H 3 ) group, a (C 1 –C 4 )-hydroxyalkyl group, or a (C 2 –C 4 )-dihydroxyalkyl group.