Patent ID: 6572664
Filing Date: 2003-06-03
Classification: A61K,A61Q,C07D

Abstract:
A composition for oxidation dyeing of keratin fibers comprising, in a medium appropriate for dyeing keratin fibers:(i) at least one oxidation base; and (ii) at least one coupler chosen from indolizine derivatives of formula (I) and the acid addition salts thereof: â€ƒwherein: n is an integer ranging from 0 to 4; R1 and R3, which may be identical or different, are each chosen from a hydrogen atom; halogen atoms; C1-C4 alkyl radicals; C1-C4 alkoxy radicals; C1-C4 monohydroxyalkyl radicals; C2-C4 polyhydroxyalkyl radicals; C1-C4 aminoalkyl radicals; acetylamino radicals; acetylamino(C1-C4)alkyl radicals; (C1-C4)alkoxy(C1-C4)alkyl radicals; mono(C1-C4)alkylamino(C1-C4)alkyl radicals; di(C1-C4)alkylamino(C1-C4)alkyl radicals; aminocarboxy(C1-C4)alkyl radicals; acetyl(C1-C4)alkylamino(C1-C4)alkyl radicals; and aromatic rings, optionally substituted with at least one radical chosen from halogen atoms, C1-C4 alkyl radicals, trifluoromethyl radicals, C1-C4 alkoxy radicals, amino radicals and mono- and disubstituted amino radicals wherein the substituent is chosen from C1-C4 alkyl radicals, (C1-C4)alkylamino(C1-C4)alkyl radicals, di(C1-C4)alkylamino(C1-C4)alkyl radicals, carboxyl radicals and sulphoxy radicals; wherein R3 may optionally further be chosen from 5- and 6-membered unsaturated heterocycles; and with the proviso that at least one of R1 and R3 is a hydrogen atom; R2 and R4, which may be identical or different, are each chosen from a hydrogen atom, halogen atoms, C1-C4 alkyl radicals, C1-C4 monohydroxyalkyl radicals, C2-C4 polyhydroxyalkyl radicals, C1-C4 aminoalkyl radicals, mono(C1-C4)alkylamino(C1-C4)alkyl radicals, di(C1-C4)alkylamino(C1-C4)alkyl radicals, carboxyl radicals, cyano radicals, carboxy(C1-C4)alkyl radicals, nitro radicals, and 5- and 6-membered aromatic rings, optionally substituted with at least one radical chosen from halogen atoms, C1-C4 alkyl radicals, trifluoromethyl radicals, C1-C4 alkoxy radicals, amino radicals and mono- and disubstituted amino radicals wherein the substituent is chosen from C1-C4 alkyl radicals, (C1-C4)alkylamino(C1-C4)alkyl radicals, di(C1-C4)alkylamino(C1-C4)alkyl radicals, carboxyl radicals and sulphoxy radicals.