2-amino-6-chloro-4-nitro-phenol derivatives, process to their production and hair dyes containing those compounds
US5067966A · kind A · utility
10Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Aug 17, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B51/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The improved hair dye compounds are 2-amino-6-chloro-4-nitrophenol derivatives of the general formula (I) ##STR1## wherein the radical R is a straight-chain or branched alkyl group with 1 to 5 carbon atoms. These hair dye compounds may be made by substitution of an amine group hydrogen of 2-amino-6-chloro-4-nitrophenol to form the amide and subsequent reduction, preferably with sodium borohydride. The hair dye compositions contain a compound of formula (I). The compounds of formula (I) dye the hair an intense red and can be favorably tolerated physiologically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.