、
phenyl 6-acetyl-4-O-benzyl-3-O-tert-butyldimethylsilyl-2-deoxy-1-thio-2-(2,2,2-trichloroethoxycarbamonyl)-β-D-galactopyranoside 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 1.5h,
以76%的产率得到2-(trimethylsilyl)ethyl 6-O-acetyl-4-O-benzyl-3-O-tert-butyldimethylsilyl-2-deoxy-2-(2,2,2-trichloroethoxycarbamonyl)-β-D-galactopyranosyl-(1->4)-{methyl 4,7,8,9-tetra-O-acetyl-3,5-dideoxy-5-(2,2,2-trichloroethoxycarbamonyl)-D-glycero-α-D-galacto-2-nonulopyranosylonate-(2->3)}-2,6-di-O-benzyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside