Synthesis and pharmacological studies of N-substituted 6-[(2-aminoethyl)amino]-1,3-dimethyl-2,4(1H,3H)-pyrimidinediones, novel class III antiarrhythmic agents
A series of 6-[(2-aminoethyl)amino]-1,3-dimethyl-2,4(1H,3H)- pyrimidinedione derivatives were synthesized and studied for their class III electrophysiological activity and class II (beta-blocking) effects in in vitro and in vivo models. Structure-activity relationships are discussed for a series of compounds. Several members of this series prolonged the action potential duration at 75% repolarization