Ciba-geigy Corporation

Thomas Leutert

Bruno Kamber

Kurt Eichenberger

Hans Kuhnis

Compounds of the formula I ##STR1## in which n represents 1, 2 or 3, Ar represents a carbocyclic or heterocyclic aryl radical, Ac represents the acyl radical of an acid, Z represents a radical --OR.sub.7 or --NR.sub.8 R.sub.9, R.sub.1 represents hydrogen, unsubstituted or substituted lower alkyl, a carbocyclic or heterocyclic aryl radical or free, etherified or esterified hydroxy, R.sub.2 and R.sub.3, independently of one another, each represents hydrogen, unsubstituted or substituted lower alkyl, formyl or functionally modified formyl, carboxy or functionally modified carboxy, a carbocyclic or heterocyclic aryl radical or unsubstituted or mono- or di-substituted amino, R.sub.4 represents hydrogen or lower alkyl, R.sub.5 and R.sub.6, independently of one another, each represents hydrogen, unsubstituted or substituted lower alkyl or a carbocyclic or heterocyclic aryl radical, R.sub.7, R.sub.8 and R.sub.9, independently of one another, each represents hydrogen, unsubstituted or substituted alkyl or a carbocyclic or heterocyclic aryl radical; in which R.sub.1 and R.sub.2 together or R.sub.1 and R.sub.3 together may represent unsubstituted or substituted lower alkylene in which a carbon atom is optionally replaced by a hetero atom, in which R.sub.4 and R.sub.5 together, and likewise R.sub.5 and R.sub.6 together and/or R.sub.8 and R.sub.9 together, independently of one another, may represent unsubstituted or substituted lower alkylene in which a carbon atom may have been replaced by a hetero atom, optical isomers of compounds of the formula I, mixtures of these optical isomers and salts of such compounds that have a salt-forming grouping, are distinguished by cardiovascular, especially blood pressure-reducing, properties. They are manufactured in a manner known per se.

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Dornach, Switzerland

Thomas Leutert