Chromone derivatives
US4309354A · kind A · utility
1Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1980 |
| Grant date | Jan 5, 1982 |
| Priority date | — |
| Expiry date | Dec 19, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P31/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New chromone derivatives having the formula: ##STR1## wherein A represents a hydrogen atom, a halogen atom or a hydroxyl group, and R.sub.1 represents a lower alkyl or a chloro-substituted lower alkyl group. The derivatives are useful intermediates for synthesis of cephem derivatives as antibacterial drugs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.