4-Hydroxy-3-nitro-quinoline-2(1H)-ones
US4192876A · kind A · utility
5Cited by
1References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1977 |
| Grant date | Mar 11, 1980 |
| Priority date | — |
| Expiry date | Jun 20, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D215/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Anti-allergic 4-hydroxy-3-nitro-quinoline-2(1H)-ones are prepared by reacting an isatoic anhydride with the carbanion resulting from the treatment of nitro acetic acid alkyl esters with a proton abstracting agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.