2-(trimethylsilyl)ethyl 6-O-tert-butyldiphenylsilyl-2-deoxy-2-phthalimido-β-D-galactopyranosyl-(1->3)-4-O-acetyl-2,6-di-O-benzyl-β-D-galactopyranoside 、
6-O-acetyl-2,3,5-tri-O-benzoyl-β-D-galactofuranosyl trichloroacetimidate 在
三乙基硅基三氟甲磺酸酯 作用下,
以
二氯甲烷 为溶剂,
反应 0.75h,
以77.2%的产率得到2-(trimethylsilyl)ethyl 6-O-acetyl-2,3,5-tri-O-benzoyl-β-D-galactofuranosyl-(1->3)-6-O-tert-butyldiphenylsilyl-2-deoxy-2-phthalimido-β-D-galactopyranosyl-(1->3)-4-O-acetyl-2,6-di-O-benzyl-β-D-galactopyranoside