Tetrazolylcoumarin derivatives and antiallergic compositions containing the same
US4406908A · kind A · utility
1Cited by
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5Claims
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Assignee
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Key dates
| Filing date | May 6, 1981 |
| Grant date | Sep 27, 1983 |
| Priority date | — |
| Expiry date | May 6, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Tetrazolylcoumarin derivatives of the general formula: ##STR1## wherein R is hydrogen atom, an alkyl group, an alkenyl group, an alkoxyalkyl group or phenyl group, n is an integer of 2 to 4, and the R--O--(CH.sub.2).sub.n --O-- group is substituted at any of the 5, 6, 7 and 8 positions of the coumarin ring, and the salts thereof. The compounds are useful as antiallergic agents for preventing and treating allergic diseases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.