Cationic azo monomers or symmetric dimers, preparation thereof, compositions comprising same and process for dyeing keratin fibers

摘要

Disclosed herein are compounds of formulae (I) and (II) below, and also to processes for the synthesis thereof:; Also disclosed herein are dye compositions comprising said compounds, as cationic direct dyes, and methods for dyeing keratin fibers, for example, human keratin fibers, using these compositions.