Synthesis, NMR and X-ray studies on novel heteroaromatic aldoxime O-ether 2- and 2,3-unsaturated glycosides

Abstract

We present the synthesis of novel hydrolytically stable heteroaromatic oxime ether glycosides in very good yields and high anomeric selectivity. The products obtained are α-glycosides and the double bond configuration is E. The aldoxime O-ether carbohydrate derivatives were analysed by structural X-ray diffraction and NMR spectral data. A complete investigation on the glycoside structures, that includes conformation characteristics in the pyranose ring and heterocyclic alternative positions, is also described.