摘要:
The pharmacology of lipophilic 4-arylamino- and 4-cycloalkylaminopyrid-3-ylsulfonyl(thio)ureas and their synthesis designed from torasemide are described. These compounds could lead to a method of inhibiting the astrocytic Na+ 2Cl(-) K+ cotransporter and thus treating cerebral edema. Their lipophilicity and ionization constants were determined. Seven lipophilic compounds (17, 18, 22, 23, 24, 32 and 36) exhibited a high inhibitory potency (IC50 < 10 mu M) and had lost the diuretic properties of torasemide. One of them, N-([4-(cycloheptylamino)pyrid-3-yl]sulfonyl)-N'-cycloheptylurea 17 (0.1-1 mg/kg) was found to increase the gasp delay in hypoxia-exposed mice. In preliminary experiments, 17 (1-2.5 mg/kg) strongly reduced the morbidity and mortality rate of gerbils after permanent left carotid artery ligation. In-vitro experiments confirmed its antiedematous activity.