The Use of ortho- cumidine as a dyestuff intermediate

A potential industrial outlet for o-cumidine as an intermediate for new monoazo and disazo solvent dyes is reported. New solvent dyes prepared from o-cumidine had much better solubilities than the corresponding commercial dyes derived from o-toluidine. Absorption maxima of the o-cumidine-based dyes were generally comparable with those of analogous o-toluidine derivatives, although a large difference was apparent in one disazo system studied. Although the monoazo dyes showed somewhat lower tinctorial strength, the disazo dyes exhibited better tinctorial power. The performance of 4-o-cumylazo-o-cumidine as a Fast Base was comparable with that of Fast Garnet GBC Base.