[(2R,3S,4S,5R,6S)-6-bromo-3,4,5-tris(2,2-dimethylpropanoyloxy)oxan-2-yl]methyl 2,2-dimethylpropanoate 、
tert-butyl 2-{[(2S,4R)-6-azido-2-{[(9H-fluoren-9-ylmethoxy)carbonyl]amino}-4-hydroxyhexanoyl]amino}acetate 在
silver silicate 作用下,
以
二氯甲烷 为溶剂,
反应 8.5h,
以91%的产率得到tert-butyl 2-{[(2S,4R)-6-azido-2-{[(9H-fluoren-9-ylmethoxy)carbonyl]amino}-4-O-(2,3,4,6-tetra-O-pivaloyl-β-D-galactopyranosyl)hexanoyl]amino}acetate