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 295/12 (2006.01) A61K 8/41 (2006.01) A61K 8/49 (2006.01) A61Q 5/10 (2006.01) C07C 45/29 (2006.01) C07C 45/60 (2006.01) C07C 49/753 (2006.01) C07C 211/50 (2006.01) C07D 233/00 (2006.01)

Patent

CA 2433836

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.

L'invention concerne des coupleurs destinés à des compositions de coloration capillaire oxydative. Lesdits coupleurs se présentent sous la forme de composés de la formule (1) dans laquelle R¿1? et R¿2? sont tous deux choisis individuellement parmi un atome d'hydrogène, un groupe C¿1? à C¿3? alkyle, un groupe C¿1? à C¿5? mono ou dihydroxyalkyle, phényle ou benzyle éventuellement substitués avec un groupe alkoxy ; ou, R¿1?, R¿2? et l'atome d'azote auquel ils sont attachés forment un cycle pipérazine, pipéridine, imidazole, ou morpholine.

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