3,4,6-tri-O-acetyl-2-azido-2-deoxy-β-D-galactopyranosyl chloride 、
双丙酮半乳糖 在
silver perchlorate 、 silver carbonate 4 A molecular sieve 作用下,
生成 1,2:3,4-Di-O-isopropyliden-6-O-(3,4,6-tri-O-acetyl-2-azido-2-desoxy-β-D-galactopyranosyl)-α-D-galctopyranose 、
1,2:3,4-O-Di-isopropyliden-6-O-(3,4,6-tri-O-acetyl-2-azido-2-desoxy-α-D-galactopyranosyl)-α-D-galactopyranose