Cycloalkenochromone
US4221800A · kind A · utility
2Cited by
6References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1977 |
| Grant date | Sep 9, 1980 |
| Priority date | — |
| Expiry date | Dec 23, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D335/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Certain substituted cycloalkenochromones and pharmacologically acceptable salts thereof are disclosed as being useful in the treatment of allergies. The compounds have the structure: ##STR1## X is --O--, --S--, or --SO.sub.2. Y is from 1 to 4. R.sub.1 is H or alkyl, and R.sub.2 is H, alkyl, aryl, carboxyl, alkoxy, aralkoxy, or alkoxycarbonyl. When R.sub.1 is alkyl, R.sub.2 is hydrogen, alkyl or aryl. At least one of R.sub.2 and R.sub.3 is alkoxycarbonyl, carboxyl or tetrazolyl. R.sub.3 is carboxyl, alkylthio, alkylsulfonyl, alkylsulfinyl, alkoxycarbonyl, or tetrazolyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.