Process for preparing dye compositions containing 5,6-dihydroxyindole
US5516916A · kind A · utility
5Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1995 |
| Grant date | May 14, 1996 |
| Priority date | — |
| Expiry date | May 31, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S424/01
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for preparing dye compositions which comprises hydrolyzing an O-protected 5,6-dihydroxyindole with an alkaline material under anaerobic condition and the products made by such process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.