2-(trimethylsilyl)ethyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1→4)-6-O-benzyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-β-D-glucopyranoside 、
phenyl 2,3,4-tri-O-benzyl-1-thio-β-D-fucopyranoside 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 5.0h,
以88%的产率得到2-(trimethylsilyl)ethyl-2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1-4)-[2,3,4-tri-O-benzyl-α-D-fucopyranosyl-(1-3)]-6-O-benzyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-β-D-glucopyranoside