Patent ID: 7635394

Claim:
A composition for dyeing keratin fibers comprising, in a medium suitable for dyeing, at least one oxidation dyeing base chosen from 3-aminopyrazolo-[1,5-a]-pyridine derivatives of formula (I) and salts and solvates thereof: in which Z 1 is chosen from an oxygen atom and a group NR 6 ; when Z 1 is NR 6 then R 1 and R 6 can form, together with the nitrogen atom to which they are attached, a saturated, unsaturated or aromatic heterocycle with 5 to 8 ring members, optionally substituted, Z 1 can alternatively be chosen from divalent radical S, SO, and SO 2 when R 1 is CH 3 , R 6 is chosen from: hydrogen, C 1 -C 10 alkyl radicals, optionally substituted with at least one saturated, unsaturated or aromatic (hetero)cycle with 5 to 8 ring members, optionally substituted saturated, unsaturated or aromatic (hetero)cycles with 5 to 8 ring members, optionally substituted, R 2 , R 3 , R 4 , R 5 , independently, are chosen from: hydrogen, C 1 -C 4 alkyl radicals, optionally substituted, a group chosen from NH 2 , NHR 10 , NR 11 R 12 , OH, OR 9 , wherein R 9 and R 10 are each chosen, independently, from a linear or branched C 1 -C 6 alkyl, optionally substituted, wherein R 11 and R 12 which may be identical or different, are each chosen from a linear or branched C 1 -C 6 alkyl, optionally substituted, R 11 and R 12 possibly forming, together with the nitrogen atom to which they are attached, a saturated, unsaturated, or aromatic heterocycle with 5 to 8 ring members optionally comprising at least one other heteroatom or group chosen from N, O, S, SO 2 , and CO, the heterocycle being optionally substituted R 2 , R 3 , R 4 , R 5 , can form, two by two with adjacent radicals, a saturated or unsaturated (hetero)cycle, optionally substituted, with the exception of 2-methoxypyrazolo[1,5-a]pyridin-3-ylamine and 2-morpholino-pyrazolo[1,5-a]pyridin-3-ylamine respectively of the following formulae: and wherein radical R 1 is chosen from C 1 -C 10 alkyl radicals, C 1 -C 10 alkyl radical substituted with a hydroxy, C 1 -C 10 alkyl radical substituted with an amino or (di)alkylamino radical, and C 1 -C 10 alkyl radical substituted with a nitrogen-containing heterocycle wherein R 1 and R 6 are not both C 1 -C 10 alkyl radicals and wherein Z 1 and R 1 together can not form (C 1 -C 4 )alkoxy radicals if R 4 and R 5 together can not form a saturated or unsaturated (hetero)cycle.