| abstract |
Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): n n nwhere R 1 and R 2 are each individually selected from a hydrogen atom, a C 1 to C 3 alkyl group, a C 1 to C 5 mono or dihydroxyalkyl group; phenyl or benzyl optionally substituted with an alkoxy group, or R 1 and R 2 together with the nitrogen atom to which they are attached form a piperazine, piperidine, imidazole, or morpholine ring. |