Abstract: The invention concerns novel pyrazole derivatives comprising at least a cationic group Z, Z being selected among the quaternized aliphatic chains, aliphatic chains comprising at least a saturated quaternized cycle, and aliphatic chains comprising at least an unsaturated quaternized cycle, their use as oxidation base for dyeing keratin fibres, dyeing compositions containing them, and dyeing methods using them.

Abstract: Novel pharmaceutical/cosmetic compositions contain at least one biaromatic ligand activator of a PPAR&ggr; receptor, such biaromatic ligand having the structural formula (I): 1

Abstract: The invention concerns novel dyeing compositions for keratinous fibers comprising at least a paraphenylenediamine derivative with pyrrolidinyl group as oxidation base, a dyeing method and a dyeing kit using said composition.

Abstract: The invention relates to novel 4-hydroxyindole derivatives comprising at least one cationic group Z, Z being selected from quaternized aliphatic chains, aliphatic chains containing at least one quaternized saturated ring, and aliphatic chains containing at least one quaternized unsaturated ring, to their use as a coupler for the oxidation dyeing of keratinous fibers, to the dyeing compositions comprising them, and to the methods of oxidation dyeing which employ them.

Abstract: The invention relates to novel compositions for the oxidation dyeing of keratin fibers, comprising at least one para-phenylenediamine derivative containing an azetidinyl group as oxidation base, to the dyeing process and to the dyeing kit using this composition, and also to novel para-phenylenediamines containing an azetidinyl group.

Abstract: The invention relates to novel 4-hydroxyindole derivatives comprising at least one cationic group Z, Z being selected from quaternized aliphatic chains, aliphatic chains containing at least one quaternized saturated ring, and aliphatic chains containing at least one quaternized unsaturated ring, to their use as a coupler for the oxidation dyeing of keratinous fibers, to the dyeing compositions comprising them, and to the methods of oxidation dyeing which employ them.

Abstract: The invention relates to novel 4-hydroxyindole derivatives comprising at least one cationic group Z, Z being selected from quaternized aliphatic chains, aliphatic chains containing at least one quaternized saturated ring, and aliphatic chains containing at least one quaternized unsaturated ring, to their use as a coupler for the oxidation dyeing of keratinous fibers, to the dyeing compositions comprising them, and to the methods of oxidation dyeing which employ them.

Abstract: The invention relates to novel 4-hydroxyindole derivatives comprising at least one cationic group Z, Z being selected from quaternized aliphatic chains, aliphatic chains containing at least one quaternized saturated ring, and aliphatic chains containing at least one quaternized unsaturated ring, to their use as a coupler for the oxidation dyeing of keratinous fibers, to the dyeing compositions comprising them, and to the methods of oxidation dyeing which employ them.

Abstract: The invention relates to novel compositions for the oxidation dyeing of keratinous fibres, comprising at least one 3-aminopyrazolo[1,5-a]-pyrimidine, to the method of dyeing which employs this composition, to novel 3-aminopyrazolo[1,5-a]pyrimidines and to the process for their preparation.

Abstract: The invention relates to novel compositions for the oxidation dyeing of keratinous fibers, comprising at least one 3-aminopyrazolo[1,5-a]-pyrimidine, to the method of dyeing which employs this composition, to novel 3-aminopyrazolo[1,5-a]pyrimidines and to the process for their preparation.

Abstract: Novel 2-imino-2,3-dihydro-1H-indole derivatives of formula (I) or (II) below: in which: R1, R2 and R3 denote hydrogen, alkyl, carboxyl, alkoxycarbonyl, monohydroxyalkyl, polyhydroxyalkyl, alkoxyalkyl, monoalkylaminoalkyl or dialkylaminoalkyl; R′3 and R4 denote alkyl, carboxyl, alkoxycarbonyl, monohydroxyalkyl, polyhydroxyalkyl, alkoxyalkyl, monoalkylaminoalkyl or dialkylaminoalkyl; R5 denotes hydrogen, alkyl, monohydroxyalkyl, polyhydroxyalkyl, alkoxyalkyl, monoalkylaminoalkyl or dialkylaminoalkyl; and the addition salts thereof with an acid, as well as their uses for dyeing keratin fibres.

Abstract: Novel compositions for the oxidation dyeing of keratin fibres, comprising at least one specific pyrazolo[1,5-a]pyrimidine derivative, a dyeing process using these compositions, novel pyrazolo[1,5-a]pyrimidine derivatives and a process for their preparation.

Abstract: The invention relates to N-substituted 4-hydroxyindoline derivatives, to their process of synthesis, to their use as couplers for the oxidation of dyeing of keratinous fibers, in combination with at least one oxidation base, and to the dyeing processes in which they are used.

Abstract: A composition for the oxidation dyeing of keratinous fibers comprising at least one imidazopyridine derivative as coupler and at least one oxidation base and the use of such an imidazopyridine derivative as a coupler, in combination with at least one oxidation base, for the oxidation dyeing of keratinous fibers and the dyeing processes employing them.

Abstract: A composition for dyeing keratin fibres, and in particular human keratin fibres such as the hair, characterized in that it comprises, in a medium which is suitable for dyeing:at least one coupler selected from 2-iminoindoline derivatives of formula (I) and acid addition salts thereof: ##STR1## in which: R.sub.1 represents hydrogen, alkyl, hydroxyalkyl, alkoxycarbonyl or acyl;R.sub.2 represents hydrogen, alkyl, phenyl or arylsulphonyl;R.sub.3 represents hydrogen or alkyl which may be substituted with one or more hydroxyl, alkoxy, amino, alkylamino, dialkylamino, cyano or aryl groups;R.sub.4 and R.sub.5, which may be identical or different, denote hydrogen, hydroxyl, alkyl, alkoxy, amino, alkylamino, dialkylamino, aralkyl, halogen or a nitro group; andat least one oxidation base.

Abstract: A composition for the oxidation dyeing of keratinous fibers containing at least one coupler selected from N-substituted 4-hydroxyindole compounds and acid addition salt thereofs and at least one oxidation base, N-substituted 4-hydroxyindole compounds, a process for synthesizing these substituted compounds, their use as couplers for the oxidation dyeing of keratinous fibers in combination with at least one oxidation base, as well as dyeing processes employing them.

Abstract: Composition for slowing down the loss of hair and for inducing and stimulating its growth, comprising a compound of formula: ##STR1## in which: R.sub.1 and R.sub.2 denote H or an alkyl and do not simultaneously denote H;R.sub.3 and R.sub.4 denote H, an alkyl or a heterocyclic ring with the nitrogen in position 6 and do not simultaneously denote H;X denotes H or a halogen;Y denotes O or OSO.sub.3 ;and their addition salts of physiologically acceptable acids.

Abstract: The subject of the invention is a composition for the oxidation dyeing of keratinous fibers containing at least one N-substituted 4-hydroxyindoline derivative as coupler and at least one oxidation base. The invention also relates to new N-substituted 4-hydroxyindoline derivatives, to their process of synthesis, to their use as couplers for the oxidation dyeing of keratinous fibers, in combination with at least one oxidation base, and to the dyeing processes in which they are used.

Abstract: A composition for the oxidation dyeing of keratinous fibers containing at least one coupler selected from N-substituted 4-hydroxyindole compounds and acid addition salt thereofs and at least one oxidation base, N-substituted 4-hydroxyindole compounds, a process for synthesizing these substituted compounds, their use as couplers for the oxidation dyeing of keratinous fibers in combination with at least one oxidation base, as well as dyeing processes employing them.

Abstract: The present invention provides vitamin C derivatives and cosmetic, pharmaceutical and nutritional compositions containing same which impart protective properties against oxidation of lipidic constituents of the skin.