Patent ID: 7018427

Claim:
A dyeing composition, comprising: a medium appropriate for dyeing keratinous fibers and at least one oxidation base in said medium, wherein said at least one oxidation base is chosen from compounds corresponding to the following formula (I) and the corresponding cosmetically acceptable salts thereof: wherein: A is chosen from OH and NH 2 ; R 1 and R 2 , which may be identical or different, are chosen from hydrogen, linear and branched C 1 –C 8 alkyl radicals, C 1 –C 6 hydroxyalkyl radicals, and —Y—B radicals; R 1 and R 2 may form, together with the nitrogen atom to which they are attached, a 4- to 7-membered heterocycle, optionally substituted with at least one group chosen from C 1 –C 3 alkyls, OH, NH 2 and Z—B radicals; provided that when A is OH, then R 1 and R 2 are each hydrogen; R 3 and R 4 , which may be identical or different, are chosen from hydrogen, C 1 –C 4 alkyl radicals, C 1 –C 4 alkoxy radicals, halogen atoms, and —Z—B radicals; Y is chosen from saturated and unsaturated, linear and branched C 1 –C 8 hydrocarbon chains that may include at least one hetero atom chosen from O, S, and NR, wherein R is chosen from hydrogen and C 1 –C 4 alkyl radicals; Z is chosen from a covalent bond, and saturated and unsaturated, linear and branched C 1 –C 8 hydrocarbon chains that may include at least one hetero atom chosen from O, S, and NR′, wherein R′ is chosen from hydrogen, C 1 –C 4 alkyl radicals, O—Y radicals, and NR″—Y radicals, wherein R″ is chosen from hydrogen and C 1 –C 4 alkyl radicals; and B is chosen from —SiR 5 R 6 R 7 groups, wherein R 5 , R 6 , and R 7 , which may be identical or different, are chosen from C 1 –C 4 alkyl and phenyl radicals; provided that at least one of the groups R 1 , R 2 , R 3 , and R 4 is chosen from —Y—B and Z—B.