Diphenylamines N-monosubstituted in the 4'-position and the use thereof in dye compositions for keratinic fibers

Diphenylamine of the formula:

• ##STR6## wherein R.sub.1 and R.sub.4 each independently represent a member selected from the group consisting of hydrogen, halogen, lower alkyl having 1-6 carbon atoms, lower alkoxy having 1-6 carbon atoms, amino, N-lower alkyl amino wherein the alkyl moiety has 1-6 carbon atoms, N-lower hydroxy alkyl amino wherein the alkyl moiety has 1-6 carbon atoms and acylamino wherein the acyl moiety has 2-7 carbon atoms, with at least one of R.sub.1 and R.sub.4 being said acylamino;
• R.sub.2 and R.sub.3 each independently represent a member selected from the group consisting of hydrogen, halogen, lower alkyl having 1-6 carbon atoms, lower alkoxy having 1-6 carbon atoms and acylamino wherein the acyl moiety has 2-7 carbon atoms;
• R.sub.5 and R.sub.6 each independently represent a member selected from the group consisting of hydrogen, halogen, lower alkyl having 1-6 carbon atoms and lower alkoxy having 1-6 carbon atoms with the proviso that when both R.sub.5 and R.sub.6 are other than hydrogen at least one of R.sub.5 and R.sub.6 occupies a position meta to --NHR.sub.7 ;
• and
• R.sub.7 represents a member selected from the group consisting of hydroxy alkyl having 1-6 carbon atoms, amino alkyl having 1-6 carbon atoms, mono alkyl amino alkyl wherein each alkyl moiety has 1-6 carbon atoms and dialkyl amino alkyl wherein each alkyl moiety has 1-6 carbon atoms.