Novel benzopyranylpyrrolinone derivatives
US4997846A · kind A · utility
2Cited by
3References
33Claims
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Key dates
| Filing date | Dec 9, 1988 |
| Grant date | Mar 5, 1991 |
| Priority date | — |
| Expiry date | Dec 9, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/70
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula ##STR1## wherein: R.sub.1 is cyano or nitro; PA0 R.sub.2 and R.sub.3 are independently hydrogen or lower alkyl; and PA0 R.sub.4 is alkyl; alkenyl; optionally substituted phenyl or phenyl lower alkyl; --(CH.sub.2).sub.m OR.sub.2 or --(CH.sub.2).sub.m N(R.sub.2).sub.2 ; wherein m is an integer of 1-5 and R.sub.2 is as defined above; PA0 or a pharmaceutically acceptable ester thereof; are smooth muscle relaxants, particularly useful in the treatment of hypertension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.