DIHYDROPYRIDINETHER, VERFAHREN ZU IHRER HERSTELLUNG UND IHRE VERWENDUNG

Cardioactive novel dihydropyridine ethers of the formula (I) in which R1 -stands for cyano, nitro or for a -COOR5 group, wherein R5 -denotes straight-chain, branched or cyclic alkyl having up to 6 carbon atoms, which can be interrupted by an oxygen in the chain and which can be monosubstituted or polysubstituted by identical or different substituents from the group consisting of halogen, cyano, hydroxyl, phenyl, phenoxy or by a group of the formula R2 -stands for aryl having 6 to 12 carbon atoms, which can be monosubstituted, disubstituted or trisubstituted by identical or different substituents from the group consisting of halogen, cyano, nitro, trifluoromethyl, trifluoromethoxy, trifluoromethylthio, alkyl having up to 4 carbon atoms or alkoxy having up to 4 carbon atoms, R3 -stands for aryl having 6 to 12 carbon atoms, or stands for straight-chain, branched or cyclic alkyl having up to 6 carbon atoms and R4 -stands for straight-chain alkyl having up to 4 carbon atoms or for amino or a physiologically acceptable salt thereof.