Patent ID: 7857864

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 1 and R 6 are chosen from, independently: 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, 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: