L'oreal

Loreal Sa

Thilo Fessmann

Eric Terranova

The invention relates to novel diaminopyrazole having formula (I), wherein: R, R, identical or different, represent a CCmono- or polyhydroxyalkyl, isopropyl, n-propyl or ethyl group, said groups being linear or branched, and their physiologically acceptable salts. The invention also relates to a composition for dyeing keratinous fibres containing a compound having formula (I) and the method for using same. 

Diaminopyrazole compounds and the use thereof in the oxidation dyeing of keratinous fibres

The invention relates to novel diaminopyrazole compounds having formula (I): wherein Rrepresents a linear or branched C-Calkyl or n-propyl group, or a linear or branched C-Cmono or polyhydroxy alkyl group, and the addition salts thereof with a physiologically acceptable acid. The invention also relates to the compositions containing such a compound for the dyeing of keratinous fibres and the method for using said compositions.

The invention concerns novel diaminopyrazole derivatives of formula (I), wherein: Rrepresents C-Calkyl or C-C, preferably up to C, alkenyl, linear or branched, bearing at least a substituent selected among OR, NHR, NRR', SR, SOR, COOH, CONH, CONRR&#x2032;, PO(OH), SH, SOX, a non-cationic heterocycle, Cl, Br or I; X represents H, Na, K or NH; R and R&#x2032;, identical or different, represent C-Calkyl or C-C, preferably up to C, alkenyl, linear or branched, unsubstituted or substituted by one or several functional groups selected among OH, NH, OR, NHR, NRR&#x2032;, SR, SOR, SOR, COOH, CONH, CONRR&#x2032;, PO(OH), SH, SOX, a non-cationic heterocycle, Cl, Br or I, X, R and R&#x2032; having the definitions mentioned above; Rrepresents H, or C-Calkyl or C-C, preferably up to C, alkenyl, linear or branched, unsubstituted or substituted by one or several functional groups selected among OH, NH, OR, NHR, NRR&#x2032;, SR, SOR, SOR, COOH, CONH, CONRR&#x2032;, PO(OH), SH, SOX, a non-cationic heterocycle, Cl, Br or I, X, R and R&#x2032; having the definitions mentioned above; and their physiologically acceptable salts, and their use for oxidation dyeing of keratinous fibres, in particular human hair.

Diaminopyrazole derivatives and their use for oxidation dyeing of keratinous fibres

The invention relates to diaminopyrazole derivatives having the following structure (I), wherein Rrepresents an alkyl or alkenyl radical bearing at least one substituent selected from among OR, NRR', SR, SOR, SOR, COOR, CONRR&#x2032;, PO(OH), SOX, NHCONRR, a non-cationic heterocycle, an aryl, a halogen. Rand Rare different from H and represent, independently of each other, an alkyl or alkenyl group; Rand R, together with the nitrogen atom to which they are attached, can form a heterocycle possibly comprising at least one other heteroatom selected from among N, O and S; Rand Ror the heterocycle that they form with the nitrogen to which they are attached can be substituted by at least one substituent defined above. The identical or different R, R&#x2032; groups are selected from a hydrogen atom, an alkyl or alkenyl group; R and R&#x2032;, together with the nitrogen atom to which they are attached, can form a heterocycle having at least 4 ring members that can contain at least one additional heteroatom selected from among O, N and S. X represents a hydrogen, an alkaline-earth or alkali metal atom or an ammonium group. The invention also relates to the dyeing compositions and the dyeing methods using same 

The invention concerns compounds derived from diaminopyrazole of formula (I), wherein: Ar is a 5- or 6-membered heteroaromatic radical capable of being condensed with one or several heteroaromatic cycles each comprising 5 or 6 members, and their physiologically acceptable addition salts with and acid. The invention also concerns compositions containing such a compound for oxidation dyeing of keratinous fibers and the method using said compositions 

Compounds derived from diaminopyrazole substituted by a heteroaromatic radical and their use in oxidation dyeing of keratinous fibers

The invention concerns compounds derived from diaminopyrazole of formula (I), wherein: Ris a linear or branched radical selected among C, C, Caminoalkyl radicals or C, C, Caminoalkenyl radicals, or one of the physiologically acceptable salts thereof. The invention also concerns compositions containing said compound for dyeing keratinous fibers and the method using said compositions.

Compounds derived from diaminopyrazoles substituted by an aminoalkyl or aminoalkenyl radical and their use in oxidation dyeing of keratinous fibres

The present, invention relates to novel 4,5-diaminopyrazole derivatives, to a composition for the oxidation dyeing of keratin fibers, and in particular of human keratin fibers, comprising, as oxidation base, at least one such derivative, and also to an oxidation dyeing process using this composition.

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Aulnay sous Bois, France

Thilo Fessmann