3-(Tetrazol-5-yl), 4-methyl-8-alkoxy coumarins and anti-allergic compositions thereof
US4363812A · kind A · utility
3Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1979 |
| Grant date | Dec 14, 1982 |
| Priority date | — |
| Expiry date | Nov 15, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Coumarin derivatives of the general formula: ##STR1## wherein R is hydrogen atom, an alkyl group or an alkenyl group, R.sup.1 is hydrogen atom, an alkyl group, an alkenyl group or an alkoxy group, and the OR and R.sup.1 groups each are substituted at any of the 5, 6, 7 and 8 positions of the coumarin ring, and the salt thereof. The compounds are useful as antiallergic agent for preventing and treating allergic diseases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.