Oral hypoglycemic agents. Discovery and structure-activity relationships of phenacylimidazolium halides
作者:Samuel J. Dominianni、Terence T. Yen
DOI:10.1021/jm00130a013
日期:1989.10
Blood glucose levels in viable, yellow, obese, diabetic mice are reduced following oral administration of phenacylimidazolium halides. Compounds 2 and 3 produced reductions of ca. 40% 2 h after doses of 100 mg/kg po. Since these mice do not respond to sulfonylureas, the glucose-lowering activity of phenacylimidazolium salts in this model suggests a mechanism other than that of stimulating insulin secretion. Only phenacylimidazolium halides with electron-donating groups were active; other azolium salts or variations in the phenacyl portion (alterations in the keto function; chain lengthening or extensive branching) produced inactive compounds.
A simple approach to pyrrolylimidazole derivatives by azirine ring expansion with imidazolium ylides
作者:Alexander F. Khlebnikov、Olesya A. Tomashenko、Liya D. Funt、Mikhail S. Novikov
DOI:10.1039/c4ob00865k
日期:——
A domino reaction of 2H-azirines with 1-alkyl-3-phenacyl-1H-imidazolium bromides in the presence of Et3N provides a facile route to 1-alkyl-3-(1H-pyrrol-3-yl)-1H-imidazol-3-ium bromides. 1-Benzyl derivatives can be reduced to 1-(1H-pyrrol-3-yl)-1H-imidazoles with HCO2NH4 on Pd/C. The action of KOH on pyrrolylimidazolium salts leads to a new type of stable ylide, 3-(1H-imidazol-3-ium-3-yl)-pyrrol-1-ides