Primary intermediates for hair coloring compositions for oxidative dyeing
of hair are compounds of the formula (1):
##STR1##
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.
