| abstract |
Benzofuran derivatives of the formula WHEREIN R represents an isopropyl, isobutyl, secbutyl or tertbutyl group and S represents a group of the formula OR B. R2-SO2-NHin which R1 represents a lower alkyl, lower alkenyl, lower alkadienyl, lower alkynyl, lower cycloalkyl, lower cycloalkyllower alkyl, aryl, aryl-lower alkyl, aryllower alkenyl or aryl-lower alkynyl group and R2 represents a lower alkyl, lower alkenyl or aryl group AND ACID ADDITION SALTS THEREOF ARE USEFUL AS Beta -ADRENERGIC BLOCKING AGENTS. |