Oxoimidazoquinoxalines
US4291033A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1980 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Feb 4, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D241/44
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel oxoimidazoquinoxalines of the formula ##STR1## wherein R.sub.1 and R.sub.2 are individually selected from the group consisting of hydrogen, chlorine and bromine, X is selected from the group consisting of hydrogen, alkyl of 1 to 5 carbon atoms, cycloalkyl of 3 to 5 carbon atoms and cycloalkyl-alkyl of 4 to 6 carbon atoms, R.sub.3 is selected from the group consisting of hydrogen alkyl of 1 to 5 carbon atoms, alkali metal, alkaline earth metal, aluminum, --NH.sub.4, organic amine and ##STR2## R.sub.4 and R.sub.5 are individually alkyl of 1 to 5 carbon atoms or taken together with the nitrogen atom form a saturated heterocycle of 4 to 6 carbon atoms optionally containing an oxygen atom or second nitrogen atom and n is a number from 1 to 5 and their non-toxic, pharmaceutically acceptable acid addition salts having antiallergic activity and their preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.