2,3,4,6-tetra-O-benzoyl-β-D-galactopyranose-(1->3)-2,4-di-O-benzoyl-β-D-xylopyranosyl trichloroacetimidate 、 benzyl oleanolate 3-O-2,3-di-O-benzoyl-6-deoxy-α-L-talopyranoside 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以90%的产率得到benzyl oleanolate 3-O-2,3,4,6-tetra-O-benzoyl-β-D-galactopyranosyl-(1->3)-2,4-di-O-benzoyl-β-D-xylopyranosyl-(1->4)-2,3-di-O-benzoyl-6-deoxy-α-L-talopyranoside