Five new dihydropyridine derivatives were designed and synthesized.They were determined on their inhibitive effect on potential dependent calcium channels(PDC).Five compounds were studied on Ca 2+ antagonistic effect in rat aorta by using 45 Ca transmembrane influx technique.They showed strong inhibitive effect on PDC and better than nifedipine.Preliminary results showed that all of the five compounds possessed Ca 2+ antagonizing activity.
Isoflavonoids possess broad activities besides cardiovascular activity.3 phenyl 4(1H)quinolinone derivatives are isosteres of isoflavonoids.They have similar spatial structures.Eight 3 phenyl 4(1H)quinolinone halide derivatives were synthesised for studying their biological activities especially cardiovascular activity.Their chemical structures were confirmed by 1 H NMR,MS and IR.The preliminary tests with isolated heart of rabbits indicated that both mixtures,A 1B 1,A 2B 2,had more positive inotropic effect than vesnarinone which appeared on the market in Japanese.The results of the pharmacological tests showed that the two mixtures did not affect the blood pressure and respiration of the dogs.
