Antihypertensive compositions
US3998955A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1975 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Apr 16, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D213/81
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Pyridines of the formula I ##STR1## wherein R.sub.1 is free hydroxyl, lower alkoxy, cycloalkoxy, amino-lower alkoxy or lower alkoxy-lower alkoxy, free amino, hydroxyamino, lower alkyleneamino, oxa-, aza- or thia-lower alkyleneamino or mono- or di-lower alkylamino, R.sub.2 is oxygen or sulphur, R.sub.3 and R.sub.4 are each alkoxy, free amino, mono- or di-lower alkylamino, lower alkyleneamino, oxa-, aza- or thia-lower alkyleneamino, halogen or free hydroxyl, and either R.sub.3 or R.sub.4 can be hydrogen, and alk is an alkyl group with 3-10 carbon atoms, and their N-oxides, and salts are useful as dopamine-.beta.-hydroxylase inhibitors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.