| abstract |
Compounds of formula (I), <IMAGE> (I) characterized in that R signifies optionally substituted heteroaryl-, heteroarylakyl or heteroarylalkenyl, R1 signifies hydrogen or a substituent, R2 is hydroxy or a group -z-(CH2)n-Y-R3 wherein R3 is hydrogen, alkyl, hydroxyalkyl, alkenyl, cycloalkyl, cycloalkylalkylene, hydroxy substituted cycloalkyl or cycloalkylalkylene, or optionally substituted aryl or aralkyl or aralkenyl moiety, and Y signifies oxygen or sulfur, and either Z is an oxygen atom and n is 2 or 3, or Z is a bond and n is 1, 2 or 3, A signifies alkylene or branched alkylene of 2 to 5 carbon atoms, W signifies a bond or imino, and X signifies a bond or imino, and their physiologically hydrolyzable derivatives, in which at least one hydroxy group is in esterified form. The compounds exhibit beta adrenoceptor blocking activity. Processes for the preparation of the compounds are also disclosed. |