(22R,25R)-26-acetyloxy-3β-benzoyloxyfurost-5-en-22-ol 、
2,3,4-tri-O-acetyl-α-L-rhamnopyranosyl-(1->2)-3,4,6-tri-O-acetyl-α-D-glucopyranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 2.25h,
以32%的产率得到(22R,25R)-26-acetyloxy-3β-benzoyloxyfurost-5-en-22-ol 22-O-(O-2,3,4-tri-O-acetyl-α-L-rhamnopyranosyl-(1->2)-3,4,6-tri-O-acetyl-α-D-glucopyranoside)