Hair dye compositions and new compounds useful therein

摘要

Novel compounds of the general formula <IMAGE> (I) wherein Z represents a substituted lower alkyl radical; each of R1 and R2 is hydrogen atom, a lower alkyl or a substituted lower alkyl identical with or different from Z and the functional groups NO2 and NR1R2 can occupy all ring positions in relation to OZ, with the exception that if Z is beta -hydroxyethyl, -NO2 is in the 4 position and -N(R1)(R2) is in the 2 position then either R1 or R2 is other than hydrogen. The novel compounds are for dyeing human hair in a variety of yellow shades. The compounds of formula (I) may be used as aqueous or water-alcohol solutions to form dye compositions for dyeing human hair.