Highly enantioselective synthetic routes for glucose conjugated 1,2,3-triazoles

A concise enantioselective synthetic routes to two new series of bis(dioxolane)-glucose derived 1,2,3-triazole derivatives have been developed. The enantiomeric precursors, bis(dioxolane)-glucose azide required for the synthesis are synthesized from the same precursor bis(dioxolane)-glucose. Various alkynes and enantiomeric azides undergo intermolecular [3+2] cycloaddition in the presence of Cu-catalyst, to give enantiomeric 1,2,3-triazoles at ambient temperature with good to excellent yield in respective synthetic routes.