Reacttvite Comparee de Divers Accepteurs de la d-Glucosamine lors de la Synthese de Precurseurs du Chitobiose

Acceptor reactivity in glycosylation reactions

The effect of the reactivity of the glycosyl acceptor on the outcome of glycosylation reactions is reviewed.

Syntheses of neoglycolipids with hexitol spacers between the saccharidic and the lipidic parts

Four neoglycolipids having 2-amino-2-deoxy-D-glucose or D-galactose moieties linked to the lipidic part by a glucitol or a mannitol spacer-arm have been synthesized. The key step of the synthetic strategy was the regiospecific or regioselective beta-glycosylation of partially protected glucitol or mannitol acceptors by either 3,4,6-tri-O-acetyl-2-deoxy-2-iodo-alpha-D-mannopyranosyl azide or 2,3,4,6-tetra-O-benzoyl-alpha-D-galactopyranosyl trichloroacetimidate donors.