Process for preparing N,N'-disubstituted nitro-para-phenylenedia

Details Process for preparing N,N'-disubstituted nitro-para-phenylenedia Process for preparing N,N'-disubstituted nitro-para-phenylenedia

1988-09-06

1990-03-20

Daus, Donald G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

8415, 548229, 564367, 564369, 564406, 564441, C09B 5100

Patent

active

049103415

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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patent: 4797129 (1989-01-01), Junino et al.
patent: 4835314 (1989-05-01), Konrad

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