Couplers for hair coloring compositions for oxidative dyeing of hair are
compounds of the formula (1):
##STR1##
where R.sub.1 and R.sub.2 are each individually selected from a hydrogen
atom, a C.sub.1 to C.sub.3 alkyl group, a C.sub.1 to C.sub.5 mono or
dihydroxyalkyl group; phenyl or benzyl optionally substituted with an
alkoxy group, or R.sub.1 and R.sub.2 together with the nitrogen atom to
which they are attached form a piperazine, piperidine, imidazole, or
morpholine ring.
