1-(HETEROCYCLYLALKYL)-1,3-DIHYDRO-2H-BENZIMIDAZOL-2-ONES, THEIR PREPARATION, THEIR PHARMACEUTICAL COMPOSITIONS AND THEIR USE AS BETA-ADRENERGIC RECEPTOR BLOCKERS

摘要

Novel 1-(heterocyclylalkyl)-1,3-dihydro-2H-benzimidazol-2-ones, wherein said heterocyclyl group is a 3-pyrrolidinyl or 3-piperidinyl group, each substituted in the 1-position with a 3-aryloxy-2-hydroxypropyl, 3-arylthio-2-hydroxypropyl or 2-(2,3-dihydro-1,4-benzodioxin-2-yl)-2-hydroxyethyl group, said compounds having useful beta -adrenergic receptor blocking activity.