Patent ID: 6238440
Filing Date: 2001-05-29
Classification: A61K,A61Q

Abstract:
A process for oxidation-dyeing keratin fibers comprising:(a) applying to the fibers an effective amount for dyeing of at least one dyeing composition;(b) developing color at acidic, neutral, or alkaline pH in the presence of at least one oxidizing agent which is added to the dyeing composition at the time that the dyeing composition is applied, or which is present in an oxidizing composition that is applied:(i) separately from the dyeing composition at the same time that the dyeing composition is applied to the fibres, or(ii) sequentially with the dyeing composition, wherein said at least one dyeing composition, comprises, in a medium which is suitable for dyeing:(a) a coupler, wherein said coupler is at least one pyrrolo-azole compound corresponding to formulae (I) or (II), or an acid addition salt thereof: ##STR17##wherein:R.sub.1 is a hydrogen atom; a halogen atom; an acetylamido radical; an alkoxy radical; an aryloxy radical; an acyloxy radical; an arylthio radical; an alkylthio radical; a heteroarylthio radical; a heteroaryloxy radical; a thiocyano radical; an N,N-diethylthiocarbonylthio radical; a dodecyloxythiocarbonylthio radical; a benzenesulphonamido radical; an N-ethyltoluenesulphonamido radical; a pentafluorobutanamido radical; a 2,3,4,5,6-pentafluorobenzamido radical; a P-cyanophenylureido radical; an N,N-diethylsulphamoylamino radical; a pyrazolyl radical; an imidazolyl radical; a triazolyl radical; a tetrazolyl radical; a benzimidazolyl radical; a 1-benzyl-5-ethoxy-3-hydantoinyl radical; a 1-benzyl-3-hydantoinyl radical; 5,5-dimethyl-2,4-dioxo-3-oxazolidinyl; a 2-oxy-1,2-dihydro-1-pyridinyl radical; an alkylamido; an arylamido; acetylamido; a radical NR.sup.III R.sup.IV wherein R.sup.III and R.sup.IV each independently are a C.sub.1 -C.sub.4 alkyl or a hydroxyalkyl; a carboxyl; or an alkoxycarbonyl radical;R.sub.2 and R.sub.3 each independently are a hydrogen atom; a halogen atom; a linear or branched C.sub.1 -C.sub.5 alkyl radical which is unsubstituted or substituted by one or two halogen, hydroxyl, alkoxy, aryloxy, amino, alkylamino, acyl or acylamino radicals; a C.sub.1 -C.sub.4 alkoxy radical; a C.sub.1 -C.sub.4 alkylthio radical; an arylthio radical; a benzylthio radical; an acyl radical; an acylamino radical; an acyloxy radical; a carbamoyl radical; a phenyl radical which is unsubstituted or substituted by one or two halogen, nitro, sulphonyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.3 trifluoroalkyl, amino or alkylamino groups; an alkoxycarbonyl radical; an aryloxycarbonyl radical; a cyano radical; a nitro radical; a dialkylphosphono radical; a diarylphosphono radical; a dialkoxyphospholyl radical; a dialkylphosphinyl radical; a diarylphosphinyl radical; an alkylsulphinyl radical; an arylsulphinyl radical; an arylsulphonyl radical; an alkylsulphonyl radical; a sulphonyloxy radical; an acylthio radical; a sulphamoyl radical; a haloalkyl radical; a thiocyanate radical; or a thiocarbonyl radical;Z.sub.a, Z.sub.b and Z.sub.c each independently are a nitrogen atom or a carbon atom carrying a radical R.sub.4, R.sub.5, R.sub.6 or R.sub.7 ;R.sub.4 R.sub.6 and R.sub.7 each independently are a hydrogen atom; a linear or branched C.sub.1 -C.sub.20 alkyl radical, unsubstituted or substituted by 1 or 2 radicals R, wherein R is halogen, nitro, cyano, hydroxyl, alkoxy, aryloxy amino, alkylamino, acylamino, carbamoyl, sulphonamido, sulphamoyl, trifluoromethyl, imido, alkylthio, arylthio, aryl, alkoxycarbonyl or acyl; an aryl radical, unsubstituted or substituted by 1 or 2 radicals R as defined above; or a 5- or 6-membered heterocycle having at least one nitrogen, oxygen or sulphur atom, unsubstituted or substituted by 1 or 2 radicals R as defined above;with the proviso that when R.sub.4, R.sub.6 and R.sub.7 are an alkyl radical, an aryl radical or a 5- or 6-membered heterocycle, said radical or said heterocycle may be attached to the carbon atom of the ring system via an oxygen, nitrogen or sulphur atom, such that R.sub.4, R.sub.6 and R.sub.7 are XR.sub.4, XR.sub.6 or XR.sub.7, wherein X is an oxygen, nitrogen or sulphur atom;R.sub.4, R.sub.6 and R.sub.7 may also each independently be a halogen atom; an acyl radical; a sulphonyl radical; a sulphinyl radical; a phosphonyl radical; a carbamoyl radical; a sulphamoyl radical; a cyano radical; a nitro radical; a siloxy radical; alkylthio; arylthio; an amino radical; an acylamino radical; arylamino; an acyloxy radical; a carbamoyloxy radical; a sulphonamide radical; an imide radical; a ureido radical; a sulphamoylamino radical; an alkoxycarbonylamino radical; an aryloxycarbonylamino radical; an alkoxycarbonyl radical; an aryloxycarbonyl radical; or a carboxyl radical;R.sub.5 is hydrogen; halogen; an acyl radical; an acyloxy radical; a carbamoyl radical; an alkoxycarbonyl radical; an aryloxycarbonyl radical; a cyano radical; a nitro radical; a dialkylphosphono radical; a diarylphosphono radical; a dialkoxyphospholyl radical; a dialkylphosphinyl radical; a diarylphosphinyl radical; an alkylsulphinyl radical; an arylsulphinyl radical; an alkylsulphonyl radical; an arylsulphonyl radical; a sulphonyloxy radical; an acylthio radical; a sulphamoyl radical; a thiocyanate radical; a thiocarbonyl radical; a haloalkyl radical; a haloaryloxy radical, a haloalkylamino radical, a haloalkylthio; an aryl optionally substituted by at least one electron-withdrawing group; or a heterocycle; and(b) at least one oxidation base or an addition salt thereof.