The ability to couple carbohydrate entities to produce glycosides or higher oligomers is an important goal of synthetic organic chemistry.1For the past several decades, methods to construct glycosidic linkages have improved as a result of the development of glycosidation procedures.2However, owing to their structural complexity, synthesis of oligosaccharides is still a laborious task compared with the synthesis of oligopeptides and oligonucleotides. Many additional sugar derivatives which can improve and simplifjr synthetic procedures of oligosaccharides are needed.