Couplers for use in oxidative hair dyeing
Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): wherein Y is CH or N and Z is H, OCH3, NH2 and alkyl of from 1 to 4 carbon atoms, with the proviso that when Y is N the 2,4-diaminophenoxy moieties are positioned at the 4 and 6 positions on the pyrimidine ring.
The Procter & Gamble Company
A C A A C
A61K C07D A61K A61Q C07D
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Mu-III Yuh-Guo James S.
Lim Pan Anderson