2(5-Tetrazolyl)chromones
US4133889A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1976 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | Sep 20, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There are provided compounds of formula I, ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.7 may be the same or different, and are hydrogen, hydroxy, alkoxy, alkoxy substituted by phenyl, acyl, amino, acylamino, alkenyl, halogen, or alkyl, provided that at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.7 are other than hydrogen and hydroxy, PA1 Or an adjacent pair of R.sup.1, R.sup.2, R.sup.3 and R.sup.7 represent a chain --COCH.dbd.CH--O--, PA1 X is a hydrocarbon chain containing from 2 to 10 carbon atoms and optionally substituted by a hydroxy group, and PA1 E is a carboxy group or a 5-tetrazolyl group, and pharmaceutically acceptable derivatives thereof. The compounds are indicated for use as antagonists of SRS-A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.