N-heteroarylmethyl-p-phenylenediamine derivatives as well as oxidation dyeing agents containing these compounds

1. A N-heteroarylmethyl-p-phenylenediamine derivative of the general formula (I), or a physiologically tolerated, water-soluble salt thereof,

wherein

X1 is sulfur, nitrogen, C—R6 or N—R5,

X2 is sulfur, nitrogen, C—R6 or N—R5,

X3 is sulfur, nitrogen, oxygen, C—R6 or N—R5,

R1 is hydrogen, a C 1 —C 4 alkyl group or a C 1 —C 4 hydroxyalkyl group,

R2, R3 may be the same or different and, independently of one another, are hydrogen or a C 1 -C 6 alkyl group,

R4, R6 may be the same or different and, independently of one another, are hydrogen, a halogen atom, a cyano group, a C 1 -C 4 alkoxy group, a C 1 -C 6 alkyl 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 di(C 1 -C 4 hydroxyalkyl) amino group, a C 1 -C 4 hydroxyalkylamino group, a trifluoromethane group, a —C(O)CH 3 — group, a —C(O)CF 3 — group, an —Si(CH 3 ) 3 — group, a C 1 -C 4 hydroxyalkyl group or a C 3 -C 4 dihydroxyalkyl group and

R5 is hydrogen, a C 1 -C 6 alkyl group, a C 1 -C 4 hydroxyalkyl group, a phenyl group or an acetyl group,

at least one and not more than two of the X1 to X3 groups being C—R6 and not more than one of the X1 to X3 groups being sulfur, or N—R5.

2. The N-heteroarylmethyl-p-phenylenediamine derivative of claim 1 , wherein (i) R1, R2 and R3 or R1, R2, R3 and R4 are hydrogen or (ii) R1, R2 and R3 or R1, R2, R3 and R4 are hydrogen and X1 is sulfur or NH and X2 is nitrogen or CR6 and X3 is C—R6 or (iii) R1, R2 and R3 or R1, R2, R3, and R4 are hydrogen and X3 is sulfur or oxygen and X1 and X2 are C—R6 or (iv) R1, R2 and R3 or R1, R2, R3 and R4 are hydrogen and X2 is sulfur or oxygen and X1 and X3 are C—R6.

3. The N-heteroarylmethyl-p-phenylenediamine derivative of claim 1 , selected from the group consisting of N-thiophene-3-ylmethyl-1,4-diaminobenzene, N-furan-3-ylmethyl-1,4-diaminobenzene, N-(1H-imidazole-2-ylmethyl)-1,4-diamino-benzene, N-(1H-pyrrole-2-ylmethyl)-1,4-diaminobenzene and N-thiophene-2-ylmethyl-1,4-diaminobenzene.

4. An agent for the oxidative dyeing of keratin fibers on the basis of a combination of developing and coupling substances, containing a N-hetero-arylmethyl-p-phenylenediamine derivative of the general formula (I) of claim 1 as developing substance.

5. The agent of claim 4 , wherein the N-hetero-arylmethyl-p-phenylenediamine derivative of the general formula (I) is contained in an amount of 0.005 to 20% by weight.

6. The agent of claim 4 , wherein the coupling substance is selected from the group consisting of 2,6-diamino-pyridine, 2-amino-4-[(2-hydroxyethyl)amino]-anisole, 2,4-diamino-1-fluoro-5-methyl-benzene, 2,4-diamino-1-methoxy-5-methylbenzene, 2,4-diamino-1-ethoxy-5-methyl-benzene, 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-(methyl-amino)-pyridine, 2,6-diamino-3,5-dimethoxypyridine, 3,5-diamino-2,6-dimethoxypyridine, 1,3-diaminobenzene, 2,4-diamino-1-(2-hydroxyethoxy)-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-ethoxy-benzene, 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-diamino-phenoxy)-methane, 1,3-diamino-2,4-dimethoxybenzene, 2,6-bis-(2-hydroxyethyl)-amino-toluene, 4-hydroxyindole, 3-dimethylamino-phenol, 3-diethylamino-phenol, 5-amino-2-methylphenol, 5-amino-4-fluoro-2-methylphenol, 5-amino-4-methoxy-2-methylphenol, 5-amino-4-ethoxy-2-methyl-phenol, 3-amino-2,4-dichlorophenol, 5-amino-2,4-dichloro-phenol, 3-amino-2-methyl-phenol, 3-amino-2-chloro-6-methyl-phenol, 3-aminophenol, 2-[(3-hydroxyphenyl)amino]-acetamide, 5-[(2-hydroxyethyl)amino]-2-methyl-phenol, 3-[(2-hydroxyethyl)amino]-phenol, 3-[(2-methoxyethyl)-amino]-phenol, 5-amino-2-ethyl-phenol, 2-(4-amino-2-hydroxyphenoxy)-ethanol, 5-[(3-hydroxypropyl)amino]-2-methyl-phenol, 3-[(2,3-dihydroxypropyl)amino]-2-methylphenol, 3-[(2-hydroxyethyl)amino]-2-methylphenol, 2-amino-3-hydroxypyridine, 5-amino-4-chloro-2-methyl-phenol, 1-naphthol, 1,5-dihydroxynaphthalene, 1,7-dihydroxy-naphthalene, 2,3-dihydroxy-naphthalene, 2,7-dihydroxynaphthalene, 2-methyl-1-naphthol-acetate, 1,3-dihydroxy-benzene, 1-chloro-2,4-dihydroxybenzene, 2-chloro-1,3-dihydroxybenzene, 1,2-dichloro-3,5-dihydroxy-4-methylbenzene, 1,5-dichloro-2,4-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 3,4-methylenedioxyphenol, 3,4-methylenedioxyaniline, 5-[(2-hydroxy-ethyl)amino]-1,3-benzodioxole, 6-bromo-1-hydroxy-3,4-methylenedioxy-benzene, 3,4-diaminobenzoic 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.

7. The agent of claim 4 , wherein the developing and coupling substances are contained in an amount of 0.005 to 20% by weight in each case.

8. The agent of claim 4 , further comprising at least one direct dye.

9. The agent of claim 4 , consisting of a hair-dyeing agent.

10. The N-heteroarylmethyl-p-phenylenediamine derivative of claim 1 , selected from the group consisting of N-thiophene-3-ylmethyl-1,4-diaminobenzene, N-furan-3-ylmethyl-1,4-diaminobenzene, N-(1H-imidazole-2-ylmethyl)-1,4-diaminobenzene, N-(1H-pyrrole-2-ylmethyl)-1,4-diaminobenzene, N-(N-methyl-pyrrole-2-ylmethyl)-1,4-diaminobenezene, N-(thiophene-2-ylmethyl)-1,4-diaminobenzene, N-(thiazole-2-ylmethyl)-1,4-diamino-benzene, N-(5-nitrothiophene-2-ylmethyl)-1,4-diaminobenzene, N-(3-methylthiophene-2-ylmethyl)-1,4-diaminobenzene, N-(2-methylthiophene-3-ylmethyl)-1,4-diaminobenzene, N-(4-methylthiophene-3-ylmethyl)-1,4-diaminobenzene, N-(5-methylthiophene-2-yl-methyl)-1,4-diaminobenzene, N-(3-chlorothiophene-2-ylmethyl)-1,4-diaminobenzene, N-(4-methylthiophene-2-ylmethyl)-1,4-diaminobenzene, N-(4-chlorothiophene-2-yl-methyl)-1,4-diaminobenzene, N-(5-methylthiophene-2-ylmethyl)-1,4-diaminobenzene, N-(5-chlorothiophene-2-ylmethyl)-1,4-diaminobenzene, 2-[(4-aminophenyl)-thiophene-2-ylmethyl-amino]-ethanol, 2-[(4-aminophenyl)-1H-imidazole-2-ylmethyl-amino]-ethanol, N-methyl-N-thiophene-3-ylmethyl-1,4-diaminobenzene, N-methyl-N-furan-3-ylmethyl-1,4-diaminobenzene, N-methyl-N-(1H-imidazole-2-ylmethyl)-1,4-diaminobenzene, N1-(1H-imidazole-2-ylmethyl)-1,4-diamino-2-methylbenzene, N4-(1H-imidazole-2-yl-methyl)-1,4-diamino-2-methylbenzene, N1-furan-3-ylmethyl-1,4-diamino-2-methyl-benzene, N4-furan-3-ylmethyl-1,4-diamino-2-methylbenzene, N1-thiophene-2-ylmethyl-N1,4-diamino-2-methylbenzene, N4-thiophene-2-ylmethyl-1,4-diamino-2-methylbenzene, 2-{5-amino-2-[(furan-2-ylmethyl)-amino]-phenyl}-ethanol, 2-(6-amino-3-[(furan-2-ylmethyl)-amino]-phenyl}-ethanol, 2-{5-amino-2-[thiophene-3-ylmethyl)-amino]-phenyl}-ethanol, 2-{6-amino-3-[(thiophene-3-ylmethyl)-amino]phenyl}-ethanol, 2-{5-amino-2-[(thiophene-2-ylmethyl)-amino]-phenyl}-ethanol and 2-{6-amino-3-[(thiophene-2-ylmethyl)-amino]-phenyl}-ethanol.