6,8-Di-t-butyl-4-oxo-4H-1-benzopyran-2-carboxylic acid and derivative for the prevention of asthmatic symptoms
US4055654A · kind A · utility
2Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1976 |
| Grant date | Oct 25, 1977 |
| Priority date | — |
| Expiry date | Jan 2, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There are described certain mono-chromone-2-carboxylic acids of formula, ##STR1## having one substituent in the 5 or 6 position or having 2 or more substituents in the 5,6,7 or 8 positions. There are also described processes for making the compounds and pharmaceutical compositions, for the treatment of asthma, containing the compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.