A series of w-disubstituted alkenoic acid derivatives were designed and synthesized as antithrombotic inhibitors of thromboxane Az synthetase and thromboxane Az receptor antagonists. Hexenoic acid derivatives with a 3-pyridyl group and a 44 2- benzenesulfonamidoethy1) phenyl substituent were found to be optimal with regard to the dual mode of action. The most potent compound,(E)-6-(4-(2-(((Cchlorophen yl) sulfonyl) ...