Benzopyran and benzoxazine derivatives
US5977167A · kind A · utility
15Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Feb 19, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D417/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel benzopyran and benzoxazine derivatives represented by the general formula: wherein R.sub.1 and R.sub.2 represent a lower haloalkyl group, R.sub.3 represents a hydrogen atom, etc., R.sub.4 represents a heterocyclic group or A--O-- wherein A represents a cyclic structure, etc., R.sub.5 and R.sub.6 represent a lower haloalkyl, X represents .dbd.N--, N.fwdarw.O, etc, are disclosed. These compounds exhibit K.sup.+ channel opening activating and can be widely used as an anti-asthma drug, an anti-epilepsy drug, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.