A series of lH-imidazol-1-yl-and 3-pyridyl-substituted 3, 4dihydroquinolin-2 (lH)-onea was designed and syntheaized as combied inhibitors of thromboxane ('I'XAJ synthase and CAMP phosphodiesterase (PDE) in human blood plateleta. A number of struh, eg 4b, 7a, 7e, 13a, and 21-25, were superior to dazoxiben 26 as inhibitore of TXG, synthase in in vitro ADP- indud aggregation experiments with human blood platelets. The TXA, synthase inhibitory ...