Benzopyran derivatives and pharmaceutical compositions containing them
US4994470A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P9/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New benzopyran derivatives of general formula (I) in which: PA1 R.sub.1 denotes a hydrogen or halogen atom or a hydroxy, alkyloxy, nitro, amino, alkylsulphonamido, bis(alkylsulphonyl)amino, or acylamino radical, PA1 R denotes a radical of general formula: ##STR1## in which A denotes a single bond or a methylene radical and R.sub.2 and R.sub.3 which may be identical or different, denote a hydrogen or halogen atom or a hydroxy, alkyl, alkyloxy, nitro, amino, alkylsulphonamido, bis(alkylsulphonyl)amino, acylamino, sulphamoyl or cyano radical, or form together, when they are adjacent, a methylenedioxy or ethylenedioxy radical, or alternatively R denotes a 2-oxo-2H-benzimidazolyl radical, PA1 and R' and R" are identical and denote hydrogen atoms or alkyl radicals, their isomeric forms and their preparation. These new products are useful as antiarrhythmic and antifibrillating agents. ##STR2##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.