Patent ID: 7585332

Claim:
Composition for dyeing keratin fibres, comprising, in a suitable dyeing medium, a) at least one compound of formula (I), and the addition salts thereof: in which: A is a substituted or unsubstituted, 5- to 16-membered, fused or non-fused aromatic or heteroaromatic nucleus; X represents an oxygen atom, a sulphur atom or a group CR 1 R 2 ; R 1 and R 2 represent, independently of each other, a hydrogen atom, a C 1 -C 6 alkyl radical, a C 1 -C 6 hydroxyalkyl radical, a C 1 -C 6 alkoxyalkyl radical or an alkylene chain that may contain an oxygen or sulphur atom; R 1 and R 2 may together form an aromatic or non-aromatic 5- or 6-membered ring optionally containing one or more heteroatoms such as a nitrogen, oxygen or sulphur atom; R 3 represents a hydrogen atom, a halogen atom, a C 1 -C 6 alkyl radical, a cyano radical, an aromatic group, a phenoxy group or a nitro radical; W represents a group CR 4 or a nitrogen atom; R 4 represents a hydrogen atom, a halogen atom, a C 1 -C 6 alkyl radical, a cyano radical, an aromatic group, a phenoxy radical or a nitro radical; Y represents an oxygen atom, a sulphur atom or a group NR 5 ; R 5 represents a hydrogen atom or a C 1 -C 6 alkyl radical; Z represents a group —C p H 2p —, with p being an integer between 2 and 4, which may be unsubstituted or substituted with one or more substituents chosen from halo, hydroxyl, alkyl, haloalkyl, alkoxy, amino, mono- or dialkylamino, mono- or dihydroxyalkylamino and carboxyl radicals; a group —C q H 2q CO—, with q being an integer between 1 and 3, which may be unsubstituted or substituted with one or more substituents chosen from halo, hydroxyl, alkyl, haloalkyl, alkoxy, amino, mono- or dialkylamino, mono- or dihydroxyalkylamino and carboxyl radicals; n represents an integer from 1 to 4; B represents a substituted or unsubstituted, 5- to 16-membered, fused or non-fused aromatic or heteroaromatic nucleus, b) at least one thiol compound comprising at least one thiol function (SH) and a saturated or unsaturated group containing from 1 to 20 carbon atoms, said group being optionally interrupted with one or more nonadjacent groups chosen from —O—, —S—, —S—S—, amino (—NR—), carbonyl (—CO—), oxycarbonyl (—O—CO—), aminocarbonyl (—NR—CO—), aromatic or heteroaromatic nucleus, the amino groups being unsubstituted or substituted with one or two C 1 -C 6 alkyl radicals; on condition that the sulphur atom of the thiol function is attached to said group via a carbon atom; said group being optionally substituted with one or more hydroxyl, C 1 -C 6 alkoxy, hydroxycarbonyl, (C 1 -C 6 )alkoxycarbonyl, amino, aminocarbonyl or alkylcarbonylamino, in which the amino function is unsubstituted or substituted with one or two C 1 -C 6 alkyl radicals.