Bis(indolyl)ethylene aldehydes
US4902806A · kind A · utility
1Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Oct 24, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D209/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Bis(indolyl)ethylene aldehydes of the general formula ##STR1## in which R.sub.1 denotes hydrogen, alkyl, aralkyl or aryl, PA0 R.sub.2 denotes hydrogen, alkyl or aryl, PA0 R.sub.3 denotes hydrogen, alkyl, alkenyl, COOH or aryl and PA0 R.sub.4 denotes hydrogen, alkyl, alkoxy, cycloalkoxy or halogen, and these substituents themselves can carry non-ionic radicals or a carboxyl group, are dyestuff intermediates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.