New derivatives belonging to the family of 3 - amino - 1 - heteroaryloxy - 2 - propanols, use in the application and method of preparation

摘要

The present invention relates, as new industrial products, to (+/-)-, (+)- and (-)-2,4-diacetyl-5-(3-alkyl-amino-2-hydroxy-propyloxy)-benzofurans of general formula: IMAGE (I) where R is CH(CH3)2 or C(CH3)3, and to their acid addition salts. These products are useful in therapeutics, particularly as cardioselective beta-blocking agents.