Patent ID: 7582123
Filing Date: 2009-09-01
Classification: A61K,A61Q,C07D

Abstract:
1. A dyeing composition comprising, in an appropriate dyeing medium, at least one compound chosen from leuco compounds of formula (I), azomethine dyes with a pyrazolinone unit of formula (II), their mesomeric forms, and acid addition salts and solvates thereof: wherein: n is an integer ranging from 0 to 3; U is CR or N; R is chosen from: X is chosen from: V is chosen from: each instance of Y, which may be identical or different, is chosen from: when two radicals Y are carried by two adjacent carbon atoms, they may form, together with the carbon atoms to which they are attached, a saturated or unsaturated, aromatic or non-aromatic, cyclic or heterocyclic group comprising 5 to 6 members, optionally substituted by at least one C 1 -C 4 alkyl radical; Z is chosen from: R R R R R R An- is an anion or a mixture of anions which allows the electroneutrality of the structures to be ensured; with the proviso that, when Z is an alkyl radical, R 1 is not an optionally substituted phenyl radical and R 2 is not an alkyl radical; with the exception of the following compound: and also its mesomeric forms, its acid addition salts and its solvates thereof.