HETEROARYLOXYPROPANOLAMINES

摘要

The present invention provides heteroaryloxypropanolamines of the general formula: < IMG > (I) wherein A is a bi- or tricyclic heteroaromatic radical, which is optionally partly hydrogenated, X is a straightchained or branched alkylene chain containing 2 to 6 carbon atoms, R1 and R2, which can be the same or different, are hydrogen atoms or lower alkyl or benzyl radicals, R3, R4 and R5, which can be the same or different, are hydrogen atoms or lower alkyl, benzyl, formyl, lower alkanoyl, cyano, hydroxymethyl, lower alkoxycarbonyl or carbamoyl radicals or the divalent substituents sulphur or oxygen and R6, R7 and R8, which can be the same or different, are hydrogen or halogen atoms, lower alkyl, nitro, amino, lower alkylthio or lower alkoxy radicals or R6 and R7 together represent an optionally unsaturated trimethylene chain; and the pharmacologically acceptable salts thereof. The present invention also provides processes for the preparation of these compounds, as well as pharmaceutical compositions containing them.