Archiv der Pharmazie p. 791 - 797 (1993)
Update date:2022-08-28
Topics:
Rehse
Schleifer
Ciborski
Bohn
Fifteen 3-alkyl-, four 3-cycloalkyl-N-nitroso-5-sydnone imines and five 3-alkyl-N-nitro-5-sydnone imines were synthesized and their ability to inhibit platelet aggregation induced by collagen (Born-test) was studied in vitro. Dependent on the chemical structure, the IC50-values for the inhibition of platelet aggregation were in the range of 0.2-140 μmol/L. It is suggested that this scale reflects different binding properties of the nitrosimines with respect to the platelet membrane. Highest activities were observed for the 3-hexyl (2f) and the 3-cyclohexyl (2p) derivative. Three nitrimines (3e, 3f, 3i) also showed IC50 values below 10 μmol/L. For the nitrosimines 2a, 2f, and 2m antithrombotic activity was demonstrated in vivo. They inhibited laser induced arterial thrombosis in anesthetized rats up to 70% two h after oral administration. In conscious renal-hypertensive dogs, the decrease in systolic blood pressure and left ventricular enddiastolic pressure suggests an antianginal activity of the compound 2a similar to that of molsidomine (M). The smoother onset and the longer duration of action of the new compound as compared to M could be a significant advantage of 2a in the therapy of angina pectoris.
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