COMPOSES MONOCHROMOPHORIQUES MONOCATIONIQUES PARTICULIERS DE TYPE HYDRAZONE COMPRENANT UN MOTIF 2-, 4-PYRIDINIUM OU 2-, 4-QUINOLINIUM, LEUR SYNTHESE, COMPOSITIONS TINCTORIALES LES COMPRENANT, PROCEDE DE COLORATION DE FIBRES KERATINIQUES
The present invention relates to monocationic monochromophoric compounds of formulae (I) and/or (II), in which R1 is a hydrogen or an alkyl, phenyl, benzyl, alkylcarbonyl, alkylsulfonyl, aminosulfonyl or aminocarbonyl radical R5 is an alkyl, phenyl or benzyl R2 and R3 are a halogen, or an alkyl, aryloxy, arylamino, hydroxyl, alkoxy, (poly)hydroxyalkoxy, alkoxycarbonyl, alkylcarbonyloxy, amino, alkylcarbonylamino, aminocarbonyl, ureido, aminosulfonyl, alkylthio, alkylsulfonylamino, cyano, trifluoromethyl, thio, alkylsulfinyl or alkylsulfonyl radical R4 is a hydrogen or an alkyl, amino, alkylcarbonylamino, ureido, alkylsulfonylamino, hydroxycarbonyl, alkoxycarbonyl, cyano, phenyl or benzyl radical R6 and R7 are a hydrogen or an alkyl, alkylcarbonyl, alkoxycarbonyl, alkoxyaryl, aminoaryl, aminocarbonyl or alkylsulfonyl radical, n is between 0 and 4, and n is between 0 and 4, wherein the electroneutrality of the compounds of formulae (I) and (II) is provided by one or more cosmetically acceptable anions An. It also relates to dye compositions containing said compounds as direct dye, and also to a method for dyeing keratin fibres using this composition and to a multicompartment device. Finally, it relates to methods for synthesizing the compounds of formulae (I) and/or (II).La présente invention a pour objet des composés monochromophoriques monocationiques de formules (I) et/ou (II) suivantes: Elle a de plus pour objet des compositions tinctoriales comprenant lesdits composés à titre de colorant direct, ainsi quun procédé de coloration de fibres kératiniques mettant en oeuvre cette composition et un dispositif à plusieurs compartiments. Elle concerne enfin des procédés de synthèse des composés de formule (I) et/ou (II).
