| abstract |
The invention relates to agents for the oxidation modification of the color of keratinous fibers and in particular human hair, which comprises in a cosmetic excipient at least one oxidation dye precursor according to formula (I) and / or its salt physiologically. tolerable, wherein R1, R2, R3, R4 independently of one another represent a hydrogen atom, a C1-C6 alkyl group, a C2-C6 alkenyl group, a C1-C6 hydroxyalkyl group; ), a (C2-C6) polyhydroxyalkyl group or (C1-C6) alkoxy-(C2-C6) alkyl group, n represents an integer from 2 to 6 and Z represents an aromatic or aliphatic heterocycle or a carbocycle aromatic or aliphatic. A second subject of the present invention relates to the compounds according to formula (I) themselves. |