6-O-acetyl-2,4-di-O-benzyl-3-O-(3,6-di-O-acetyl-2-azido-4-O-benzyl-2-desoxy-β-D-galactopyranosyl)-α-D-galactopyranosyl bromid 、 (2R,3S,4S,5R,6S)-4,5-Bis-benzyloxy-2-benzyloxymethyl-6-((2S,3S,4R,5R,6R)-2,4,5,6-tetrakis-benzyloxy-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-3-ol 在
silver perchlorate 、 silver carbonate 作用下,
以
二氯甲烷 为溶剂,
反应 5.0h,
以32%的产率得到benzyl O-(3,6-di-O-acetyl-2-azido-4-O-benzyl-2-desoxy-β-D-galactopyranosyl)-(1->3)-O-(6-O-acetyl-2,4-di-O-benzyl-α-D-galactopyranosyl)-(1->4)-O-(6-O-benzoyl-2,3-di-O-benzyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranosid