| abstract |
The primary intermediate in hair coloring compositions for oxidatively dyeing hair is a compound of formula (1): Embedded image Wherein R 1 and R 2 are each selected from a hydrogen atom, a C 1 -C 3 alkyl group, a C 1 -C 5 mono or dihydroxyalkyl group, phenyl or benzyl optionally substituted with an alkoxy group. Or R 1 and R 2 combine with the nitrogen atom to which they are attached to form a piperazine, piperidine, imidazole, or morpholine ring). |