Naphthalene and 2-oxo-benzopyran acids and derivatives and pharamaceutical use thereof
US4518612A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1983 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Dec 21, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There are described compounds of formula I, ##STR1## in which Ra, Rb, Rc, Rd, Re, Rf and Rg, which may be the same or different, each represent hydrogen, amino, hydroxy, alkoxy, alkenyloxy, halogen, acyl, alkenyl, alkyl, or alkoxy substituted by phenyl, PA0 Rh is hydrogen, alkyl or --COOH. PA0 X is a hydrocarbon chain containing from 2 to 10 carbon atoms and optionally substituted by a hydroxy group, PA0 A has no significance or represents Y, OY, or SY and Y represents a C 1 to 4 hydrocarbon chain which is optionally substituted by alkyl C 1 to 4, PA0 E and G, which may be the same or different, each represent --O--, --S-- or --CH.sub.2 --, provided that at least one of E and G is --O-- or --S--, PA0 L, together with the carbon atoms to which it is attached, forms a benzene, furan, thiophene, pyrrole, or pyran-2-one ring, and pharmaceutically acceptable derivatives thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.