Preparation of suitably functionalized monosaccharide derivatives are the basic requirements in the synthesis of oligosaccharides. Benzylidene acetal is one of the frequently used protecting groups in the oligosaccharide synthesis for the temporary protection of C??4/C??6 hydroxyl groups in carbohydrate derivatives.1 View all references It can be removed easily under acidic hydrolysis24. Hann , RM , Richtmyer , NK , Diehl , HW and Hudson , CS 1950. ...