Synthesis and structure-activity relationship of some new beta-blocking agents with possible alpha-adrenoreceptor activity

A series of new phenoxypropanolamines with cyclic guanidine and isothiourea moieties has been prepared and investigated for non-specific beta- and alpha-adrenoreceptor activity by receptor binding experiments on crude rat brain membrane. Some of them [9a, 10c] possess affinity for both beta- and alpha-adrenoreceptors.