Process for the production of 2-substituted chromones
US4158663A · kind A · utility
2Cited by
0References
2Claims
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Assignee
Inventors
Key dates
| Filing date | Mar 31, 1978 |
| Grant date | Jun 19, 1979 |
| Priority date | — |
| Expiry date | Mar 31, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention is concerned with a novel process for the production of 2-substituted chromones (I) from readily available 4-methoxycoumarins. ##STR1## These compounds are useful as antiallergy agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.