Abstract: Compounds of formula (I), ##STR1## characterized in that R signifies optionally substituted heteroaryl-, heteroarylakyl or heteroarylalkenyl, R.sub.1 signifies hydrogen or a substituent, R.sub.2 is hydroxy or a group --z--(CH.sub.2).sub.n --Y--R.sub.3 wherein R.sub.3 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.

Abstract: p-Tert. butylbenzaldehyde is manufactured by the electrochemical oxidation of p-tert. butyltoluene, an intermediate for the production of e.g. .alpha.-methyl-.beta.-(p-tert. butylphenyl)-propionaldehyde.

Abstract: The present invention provides tetraline derivatives, useful for the treatment of hypertension, a process for their preparation and compositions containing these compounds.

Abstract: Compounds of formula I, ##STR1## wherein either R.sub.1 is hydroxy or alkoxy of 1 to 4 carbon atoms, and R.sub.2 is hydrogen, hydroxy or alkoxy of 1 to 4 carbon atoms,Or R.sub.1 and R.sub.2, together, are methylenedioxy,R.sub.3 is hydrogen or alkyl of 1 to 4 carbon atoms, andR.sub.4 is phenyl or phenyl substituted by 1, 2 or 3 substituents independently chosen from halogen, hydroxy, nitro or alkyl(C.sub.1-4) haloalkyl(C.sub.1-4), or alkoxy (C.sub.1-4),are useful as anti-arrhythmic agents.