| 摘要 |
The invention concerns novel diaminopyrazole derivatives of formula (I), wherein: R<SUB>1 </SUB>represents C<SUB>1</SUB>-C<SUB>6 </SUB>alkyl or C<SUB>2</SUB>-C<SUB>6</SUB>, preferably up to C<SUB>4</SUB>, alkenyl, linear or branched, bearing at least a substituent selected among OR, NHR, NRR', SR, SO<SUB>2</SUB>R, COOH, CONH<SUB>2</SUB>, CONRR', PO(OH)<SUB>2</SUB>, SH, SO<SUB>3</SUB>X, a non-cationic heterocycle, Cl, Br or I<SUP>-</SUP>; X represents H, Na, K or NH<SUB>4</SUB>; R and R', identical or different, represent C<SUB>1</SUB>-C<SUB>6 </SUB>alkyl or C<SUB>2</SUB>-C<SUB>6</SUB>, preferably up to C<SUB>4</SUB>, alkenyl, linear or branched, unsubstituted or substituted by one or several functional groups selected among OH, NH<SUB>2</SUB>, OR, NHR, NRR', SR, SOR, SO<SUB>2</SUB>R, COOH, CONH<SUB>2</SUB>, CONRR', PO(OH)<SUB>2</SUB>, SH, SO<SUB>3</SUB>X, a non-cationic heterocycle, Cl, Br or I, X, R and R' having the definitions mentioned above; R<SUB>2 </SUB>represents H, or C<SUB>1</SUB>-C<SUB>6 </SUB>alkyl or C<SUB>2</SUB>-C<SUB>6</SUB>, preferably up to C<SUB>4</SUB>, alkenyl, linear or branched, unsubstituted or substituted by one or several functional groups selected among OH, NH<SUB>2</SUB>, OR, NHR, NRR', SR, SOR, SO<SUB>2</SUB>R, COOH, CONH<SUB>2</SUB>, CONRR', PO(OH)<SUB>2</SUB>, SH, SO<SUB>3</SUB>X, a non-cationic heterocycle, Cl, Br or I, X, R and R' having the definitions mentioned above; and their physiologically acceptable salts, and their use for oxidation dyeing of keratinous fibres, in particular human hair.
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