7-(Ethoxycarbonyl)-6,8-dimethyl-2-phenyl-1(2H)-phthalazinone derivatives and several analogues were synthesized and their inhibitory effects on platelet aggregation were evaluated. Structure-activity relationships are discussed. All synthesized compounds showed no appreciable effect on platelet aggregation induced by adenosine diphosphate, but most of them inhibited effectively the arachidonic acid
Phthalazinones made easy! A new, straightforward methodology for the carbonylativesynthesis of phthalazinones has been established. Starting from readily available 2‐bromobenzaldehydes or 2‐bromoacetophenone and hydrazines, a variety of phthalazinones have been produced in good isolated yields (see scheme).