ARYLOXYPROPANOLAMINES PROCESSES FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS THEREOF

The present invention provides aryloxypropanolamines of the general formula: wherein R1, R2, R3 and R4, which may be the same or different, are hydrogen or halogen atoms or lower alkyl, cyano, carboxamide, hydroxyl, lower acyloxy, lower alkoxy, lower alkenyloxy or aryl lower alkoxy radicals, R5 and R6, which may be the same or different, are hydrogen atoms or lower alkyl radicals, X is a straight or branched alkylene chain containing 2 to 6 carbon atoms, A is a mono-, bi- or tricyclic heteroaromatic or hydroheteroaromatic radical or, when at least one of the symbols R1, R2, R3 and R4 is other than a hydrogen atom, may also be a phenyl radical, with the proviso that when A is a uracil-6-yl radical, the 5-position of the uracil moiety does not contain a hydrogen atom, R7, R8, R9, R10 and R11, which may be the same or different, are mono- or divalent substituents selected from hydrogen, halogen, notro, hydraxylamino, amino, lower acylamino, lower alkylamino, di-(lower alkyl)-amino, hydroxyethylamino, di-(hydroxyethyl)-amino, hydroxyl, lower alkoxy, allyloxy, methoxy lower alkoxy, cyano, carboxamido, carboxy, lower alkoxycarbonyl, hydroxymethyl, lower alkoxymethyl, halomethyl, aminomethyl, lower acylaminomethyl, halomethyl, aminomethyl, lower acylaminomethyl, di(lower alkyl)-aminomethyl, pyrrolidinomethyl, piperidinomethyl, di-(hydroxyethyl)-amino, hydroxyl, lower alkoxy, allyloxy, methoxy lower alkoxy, cyano, carboxamido, carboxy, lower alkoxycarbonyl, hydroxymethyl, lower alkoxymethyl, halomethyl, aminomethyl, lower acyaminomethyl, di-(lower alkyl)-aminomethyl, pyrrolidinomethyl, piperidinomethyl, di-(hydroxyethyl)-aminomethyl, morpholinomethyl, piperazinomethyl, 4-lower acylpiperazinomethyl, 4-lower alkylpiperazinomethyl, lower alkyl, lower alkenyl, 2-cyanoethyl, 2-hydroxyethyl, phenyl lower alkyl and phenyl, the phenyl radicals being optionally substituted with 1 or 2 hydroxyl or methoxy radicals, or from oxygen or sulphur; the optically-active forms and the racemic mixtures thereof, and the pharmacologically compatible salts thereof. The present invention also provides processes for the preparation of these compounds and pharmaceutical compositions containing them. These compounds are useful for the prophylaxis and combatting of cardiac and circulatory diseases.