N,N'-disubstituted nitro-para-phenylenediamines, and dyeing comp

Details N,N'-disubstituted nitro-para-phenylenediamines, and dyeing comp N,N'-disubstituted nitro-para-phenylenediamines, and dyeing comp

1989-12-20

1991-08-20

Daus, Donald G.

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

8406, 564367, 564369, 564372, A61K 713

Patent

active

050411438

ABSTRACT:
The present invention relates to a process for preparing a N,N'-disubstituted nitro-para-phenylenediamine (I) according to the following scheme: ##STR1## X denoting a halogen and R a lower alkyl, lower mono- or polyhydroxyalkyl, lower alkoxyalkyl or lower aminoalkyl group, in which the amino group can be mono- or disubstituted with a lower alkyl or lower mono- or polyhydroxyalkyl group, the nitrogen atom of said amino group being able to form part of a heterocyclic system.
The invention also relates to the intermediate oxazolidones of formulae (II) and (III), and the new nitro-para-phenylenediamines in which R denotes a lower alkoxyalkyl, lower polyhydroxyalkyl or lower aminoalkyl group, as well as the dyeing compositions for keratinous fibres containing these new nitro-para-phenylenediamines.

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