Composition for the oxidative dyeing of hair containing 4,5- diaminopyrazole derivatives as well as new 4,5-diaminopyrazole derivatives and process for their synthesis

摘要

The composition for oxidative dyeing of hair based on a combination of developer substances and coupler substances, contains as a developer substance 4,5-diamino-1-(4'-methoxybenzyl)pyrazole, 4,5-diamino- 1-(4'- methylbenzyl)pyrazole, 4,5-diamino-1-(4'-chlorobenzyl)pyrazole, 4, 5- diamino-1-(3'-methoxybenzyl)pyrazole, 4-amino-1-(4'-methoxy-benzyl) -5- methylaminopyrazole or 4-amino-5-(2'-hydroxyethyl)amino-1-(4'- methoxybenzyl)pyrazole.