1,2-Cyclopropaneacetylated sugar is an effective glycosyl donor, which reacted with various glycosyl acceptors including monosaccharides, amino acids and other alcohols in the presence of BF3•OEt2 or TMSOTf. The glycosylation is stereoselective in favor of β-anomeric products with BF3•OEt2 as catalyst, whereas TMSOTf-catalyzed glycosylation prefers the α-anomeric products. 2-C-Acetonyl-2-deoxy-d-galactosides