Stereospecific α-d-mannosylation

Abstract The stereospecific formation of α- d -mannosyl glycosidic linkages has been achieved in high yield using tetra- O -pivaloyl-α- d -mannopyranosyl fluoride and boron trifluoride diethyl etherate in dichloromethane. Examples of the α- d -mannosylation of primary, secondary, benzylic and phenolic hydroxyl groups are described.