Synthesis of Di- and Trisaccharides Comprising D-Fructopyranose with β2 → 1 Glycosidic Linkage Using β-D-Fructopyranosyl Fluoride as the Fructosyl Donor

D-Fructose was converted into a stable, suitably protected fructosyl donor for iterative glycosylation, i.e., 1-O-acetyl-3,4,5-tri-O-benzyl-β-D-fructopyranosyl fluoride and a fructosyl acceptor, methoxymethyl 3,4,5-tri-O-benzyl-β-D-fructopyranoside in good yields. Glycosylation of the both substrates provided di- and trisaccharides comprising p-D-fructopyranose with β (2→1)-interglycosidic linkage.