| abstract |
Benzothiazinone derivatives I With R¹ and R⁴ are H, alkyl, alkoxy, Hal, CF₃, NO₂, OH, acetamido, amino; R² is H, (cyclo) alk (en) yl, cycloalkylalkyl, phenyl, phenylalkyl; A is equal to (CH₂) m O (CH₂) n , (CH₂) p -CH (OH) - (CH₂) q , (CH₂) p -CH (OCH₃) - (CH₂) q , (CH₂) r OCH₂-CO- , (CH₂) s -CO-; R⁵ equal to NR (6) R (7) or some cyclic amines show calcium-antagonistic activity. They can be obtained from II by implementation with III |