methyl (phenyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-2-thio-D-glycerol-β-D-galactonon-2-ulopyranoside)onate 、
5-azido-3-oxapentyl 4-O-(2,6-di-O-benzyl-β-D-galactopyranosyl)-2,3,6-tri-O-benzyl-β-D-glucopyranoside 在
N-碘代丁二酰亚胺 、
三氟甲磺酸三甲基硅酯 、 3 A molecular sieve 作用下,
以
乙腈 为溶剂,
反应 5.0h,
以25%的产率得到5-azido-3-oxapentyl 4-O-{3-O-[methyl (5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-α-D-galacto-2-nonulopyranosyl)onate]-(2,6-di-O-benzyl-β-D-galactopyranosyl)}-2,3,6-tri-O-benzyl-β-D-glucopyranoside