Patent ID: 7060109

Claim:
A dye precursor composition for coloring keratinous fibers comprising, in a cosmetically acceptable medium, (a) at least one compound selected from the group consisting of 5-carboxymethoxy-benzo[b]thiophen-3-one, 5,6-dihydroxybenzo[b]thiophen-3-one and 6-hydroxy-5-methoxybenzo[b]thiophen-3-one, 5-carboxymethoxybenzo[b]furan-3-one, and 5-(2′-hydroxyethoxy)-benzo[b]-furan-3-one; and (b) at least one reactive compound selected from the group consisting of (b1) reactive carbonyl compounds selected from the group of aromatic, heteroaromatic or unsaturated aldehydes or ketones, dialdehydes or diketones or acetals, semiaminals or imine derivatives of the reactive carbonyl compounds, and (b2) CH-active compounds corresponding to formula (2) or (3): in which R 10 is a C 1-10 alkyl group, a C 2-4 alkenyl group, a C 2-4 hydroxyalkyl group, a C 2-4 carboxyalkyl group, a C 2-4 sulfoalkyl group or an aralkyl group, R 7 and R 8 independently of one another represent a hydrogen atom, a C 1-4 alkyl group, a halogen atom, a hydroxy group, a C 1-4 alkoxy group or a nitro group or together form a fused aromatic ring, R 9 is a hydrogen atom, a C 1-4 alkyl group or an aryl group, A is an oxygen or a sulfur atom, the group —CH═CH— or >N—R 11 , where R 11 is a C 1-4 alkyl group, a C 2-4 carboxyalkyl group, a C 2-4 sulfoalkyl group, a C 2-4 sulfoxyalkyl group, a C 2-4 hydroxyalkyl group or an aralkyl group, and AN − is an anion selected from halide, C 1-4 alkyl sulfate, C 1-4 alkanesulfonate, arenesulfonate, C 1-4 perfluoroalkanesulfonate, tetrafluoroborate, perhalogenate, sulfate, hydrogen sulfate or carboxylate, in which R 12 is a C 1-4 acyl group, a C 1-4 alkylsulfonyl group, a C 1-4 alkylsulfinyl group, a C 1-4 alkylamino group, a di-C 1-4 -alkyamino group, a vinyl carbonyl group, a methineimino group, a nitrile group, an ester or carboxylic acid amide group which may optionally be substituted by a C 1-4 alkyl group, a C 2-4 hydroxyalkyl group or an aryl group, and R 13 represents a C 1-4 acyl group, a C 1-4 alkoxy group, a C 1-4 alkylamino group, a C 1-4 acylamino group or a di-C 1-4 -alkylamino group; the substituents R 12 and R 13 together with the rest of the molecule may also form a 5-, 6- or 7-membered ring system from the series of thiazolidine-2,5-diones, thiazolidine-2-thion-5-ones, perhydropyrimidine-2,4,6-triones, perhydropyrimidine-2-thione-4,6-diones, cyclopentane1,3diones, cyclohexane-1,3-diones, indane-1,3-diones, 2-pyrazoline-5-ones, 1,2-dihydro-6-hydroxy-2-hydroxypyridines or enol esters thereof, and AX represents oxygen, sulfur or a dicyanomethylene group.