2-O-acetyl-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl 2,2,2-trichloroacetimidate 、
methyl 3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1->6)-2,4-di-O-benzoyl-α-D-mannopyranoside 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以73%的产率得到methyl 2-O-acetyl-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1->2)-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1->6)-[2-O-acetyl-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1->3)]-2,4-di-O-benzoyl-α-D-mannopyranoside