An efficient glycosidation method using 2,3-unsaturated glycosyl donors

A novel class of 'armed' glycosyl donors containing a double bond at the C-2 position was designed by mimicking the mechanism of lysozyme-initiated hydrolysis. These donors were used to achieve chemoselective glycosidation of hex-2-enopyranosyl acetate and hexopyranosyl acetate, and synthesis of O-glycosidic linkages between highly deoxygenated sugars and tertiary alcohols.