Pharmaceutical preparation and use of 4-hydroxy-2-quinolinone-3-carboxylic acid esters
US4190659A · kind A · utility
11Cited by
5References
69Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1977 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Jun 20, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D215/56
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed are compounds which are 4-hydroxy-2-quinolinone-3-carboxylic acid esters, e.g., 1-methyl-4-hydroxy-2-quinolinone-3-carboxylic acid ethyl ester, useful as anti-allergic agents and intermediates for 1-alkyl-4-alkoxy-quinolin-2(1H)-ones, and prepared by reacting an isatoic anhydride with an alkali metal salt of a malonic ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.