Spiro-benzopyran derivatives and useful for treating asthma and hypertension
US5300511A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1992 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | May 21, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D405/14
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to novel benzopyran derivatives of formula(I) which have exellent effectiveness in the treatment of asthma as well as hypertension. ##STR1## wherein R.sub.1 is --CN, --NO.sub.2, --OCX.sub.1 X.sub.2 X.sub.3, --NH.sub.2, --NHSO.sub.2 R.sup.A, ##STR2## --SO.sub.2 R.sup.C or --SO.sub.2 NR.sup.C R.sup.D wherein X.sub.1, X.sub.2 and X.sub.3 are, each independently, F, Cl or H, except for that X.sub.1, X.sub.2 and X.sub.3 may not be hydrogen atom simulaneously; R.sup.A and R.sup.B are, each independently, a hydrogen atom, or a C.sub.1-6 alkyl group or an optionally substituted phenyl group with a halogen atom, or a straight or branched C.sub.1-3 alkyl group; and R.sup.C and R.sup.D are, each independently, a hydrogen atom or a C.sub.1-6 alkyl group or an optionally substituted phenyl group with a halogen atom, or a straight or branched C.sub.1-3 alkyl group; PA1 R.sub.2 is a C.sub.1-4 straight or branched alkyl group; PA1 R.sub.3 is a C.sub.1-4 straight or branched alkyl group, ##STR3## wherein R.sup.G and R.sup.H are, each independently, a C.sub.1-6 alkyl group or optionally substituted phenyl group with a halogen atom, or a straight or branched C.sub.1-3 al…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.