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

C

C07C 217/84 (2006.01) A61K 8/41 (2006.01) A61Q 5/10 (2006.01) C07C 213/06 (2006.01)

Patent

CA 2433684

Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): wherein X is selected from halogen and R5SO4 where the halogen is preferably CI, Br or I; R, R1 and R2 are each individually selected from C1 to C22 alkyl and c1 to C22 mono or dihydroxyalkyl, or two of R, R1 and R2 together with the nitrogen atom to which they are attached form a C3 to C6 saturated or unsaturated ring optionally containing in the ring one or more additional hetero atoms selected from O, and N atoms; R3 and R4 are each individually selected from C1 to C6 alkyl, C1 to C6 hydroalkyl, C1 to C6 alkoly, C1 to C6 aminoalkyl or R3 and R4 together form a C1 to C5 alkylene group; and R5 is selected from C1 to C22 alkyl and C1 to C22 mono or dihydroxyalkyl.

L'invention porte sur des coupleurs destinés à des compositions utilisées dans la coloration capillaire oxydante et qui sont des composés de la formule (1): dans laquelle X est sélectionné parmi halogène et R?5¿SO¿4?, l'halogène étant de préférence CI, Br or I; R, R?1¿ et R?2¿ qui sont chacun sélectionnés individuellement à partir d'alkyle en C¿1? à C¿22? et de mono or dihydroxyalkyle en C¿1? à C¿22?, ou deux de R, R?1¿ et R?2¿ réunis à l'atome d'azote auquel ils sont liés forment un noyau saturé ou insaturé C¿3? à C¿6? contenant éventuellement un ou plusieurs atomes additionnels sélectionnés parmi les atomes O et N; R?3¿ et R?4¿ sont chacun individuellement sélectionnés parmi alkyle C¿1 ? à C¿6?, hydroxyalkyle C¿1 ? à C¿6 ?, alcoxy C¿1? à C¿6?, aminoalkyle C¿1? à C¿6? ou R?3¿ et R?4¿ réunis forment un groupe alkylène C¿1? à C¿5?; et R?5¿ est sélectionné à partir d'alkyle C¿1? à C¿22? et mono ou dihydroxyalkyle C¿1? à C¿22?.

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