Patent ID: 7887601
Filing Date: 2011-02-15
Classification: A61K,A61Q,C07D

Abstract:
1. At least one compound chosen from leuco form compounds of formula (I), dyes of azomethine type comprising a pyrazolopyridine unit of formula (II), mesomeric forms, isomeric forms and tautomeric forms thereof, acid-addition salts thereof and solvates thereof: in which: Z a single covalent bond; a divalent radical chosen from: when p is equal to 0, R when p is equal to 1, NR Z R a hydrogen; an optionally substituted C a C a halogen; a radical SO a substituted or unsubstituted, saturated, unsaturated or aromatic 5- to 8-membered ring, optionally comprising at least one radical chosen from N, O, S, SO when Z an optionally substituted C a radical —O—CO—R, —CO—O—R, —NR—CO—R′ or —CO—NRR′ in which R and R′ independently represent a hydrogen atom or an optionally substituted C R a hydrogen atom; a hydroxyl; a C a C an amino; a monoalkylamino; a C an optionally substituted C a —O—CO—R, —CO—O—R, —NR—CO—R′ or —CO—NRR′ in which R and R′ independently represent a hydrogen atom or an optionally substituted C a halogen; a NHSO an optionally substituted C a saturated, unsaturated or aromatic, optionally substituted carbon-based ring; or two adjacent R An represents at least one anion that ensures the electronegativity of the compounds of formulae (I) and (II); provided that at least one of the groups Z n is an integer ranging from 0 to 3; U represents CR or N; R represents: a hydrogen atom; a C a C a (di)(C X represents: a hydroxyl; or a group NR′ when R′ when X represents a group NHR′ V represents: an oxygen atom; or a group NR′ when V represents a group NR′ Y, which may be identical or different, represent: a hydroxyl; a C a C a halogen; an oxygen atom substituted with a radical chosen from a C a group NR′ R′ two radicals Y borne by two adjacent carbon atoms may form, together with the carbon atoms to which they are attached, a saturated or unsaturated, aromatic or non-aromatic, 5- to 6-membered cyclic or heterocyclic optionally substituted with at least one C