Novel couplers for use in oxidative hair dyeing

Details Novel couplers for use in oxidative hair dyeing Novel couplers for use in oxidative hair dyeing

C - Chemistry, Metallurgy

07

D

C07D 295/096 (2006.01) A61K 8/34 (2006.01) A61K 8/49 (2006.01) A61Q 5/10 (2006.01) C07C 211/27 (2006.01) C07D 233/00 (2006.01) C07D 233/54 (2006.01)

Patent

CA 2434036

Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1):where R1 and R2 are each individually selected from a hydrogen atom, a C1 to C3 alkyl group, a C1 to C5 mono or dihydroxyalkyl group; phenyl or benzyl optionally substituted with an alkoxy group, or R1 and R2 together with the nitrogen atom to which they are attached form a piperazine, piperidine, imidazole, or morpholine ring.

Cette invention concerne des coupleurs utilisés dans des compositions de coloration capillaire en vue d'une coloration oxydante des cheveux et représentés par les composés de la formule (1). Dans cette formule, R¿1? et R¿2? sont chacun individuellement sélectionnés dans un groupe renfermant : un atome d'hydrogène, un groupe alkyle C¿1? à C¿3?, un groupe mono- ou dihydroxyalkyle C¿1? à C¿5?, phényl ou benzyl éventuellement substitué par un groupe alkoxy ; ou R¿1? et R¿2? ainsi que l'atome d'hydrogène auquel il sont fixés forment un noyau pipérazine, pipéridine, imidazole ou morpholine.

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