摘要 |
Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): wherein R is selected from C<SUB>1 </SUB>to C<SUB>5 </SUB>alkyl or hydroxyalkyl, a C<SUB>3 </SUB>to C<SUB>6 </SUB>cyclic ring containing hetero atoms selected from O, S and N atoms, and -CH<SUB>2</SUB>-Ar where Ar is an aromatic ring wherein the aromatic ring may be substituted with one or two hydroxy C<SUB>1 </SUB>to C<SUB>3 </SUB>alkoxy, or amino groups.
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