New dimethyl derivatives of 3-nitro-4-aminoaniline, process for their preparation and their use for dyeing keratinic fibers
US4736067A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1984 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Sep 6, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
New dimethyl derivatives of 3-nitro-4-aminoaniline, process for their preparation, and their use for dyeing keratinic fibres. The invention relates to dimethyl derivatives of 3-nitro-4-aminoaniline of formula: ##STR1## in which CH.sub.3 is in position 2 or 5 of the benzene ring and R.sub.1 and R.sub.2 denote independently of each other a hydrogen atom, a lower alkyl group, a lower mono- or polyhydroxyalkyl or a lower aminoalkyl group in which the amino group is optionally mono- or disubstituted by a lower alkyl radical or by a lower mono- or polyhydroxyalkyl radical, it being understood that the two symbols R.sub.1 and R.sub.2 can be simultaneously other than hydrogen only when the mobile CH.sub.3 radical is in position 5, or cosmetically acceptable salts of these compounds, as well as the process for preparing them and their use in dye compositions, in particular for hair, equally for direct coloring and for coloring by an oxidation route.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.