2-(trimethylsilyl)ethyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->3)-2-azido-4-O-benzyl-2-deoxy-α-D-galactopyranoside 、
2,6-dimethylphenyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-3-O-benzoyl-6-O-benzyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-1-thio-β-D-glucopyranoside 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以70%的产率得到2-(trimethylsilyl)ethyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->3)-[2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-3-O-benzoyl-6-O-benzyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-β-D-glucopyranosyl-(1->6)]-2-azido-4-O-benzyl-2-deoxy-α-D-galactopyranoside