allyl 2,3,4-tri-O-benzoyl-β-L-xylopyranosyl-(1-> 2)-α-L-rhamnopyranoside 、 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl-(1 -> 3)-2,4-di-O-benzoyl-α-L-rhamnopyranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以88.8%的产率得到allyl 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl-(1-> 3)-2,4-di-O-benzoyl-α-L-rhamnopyranosyl-(1-> 4)-[2,3,4-tri-O-benzoyl-β-L-xylopyranosyl-(1-> 2)]-α-L-rhamnopyranoside