benzyl O-(2,3,4,6-tetra-O-acetyl-α-D-mannopyranosyl)-(1->3)-O-(4,6-di-O-benzyl-β-D-mannopyranosyl)-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside 、
2,3,4-tri-O-acetyl-D-xylopyranosyl trichloroacetimidate 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
以60%的产率得到benzyl O-(2,3,4,6-tetra-O-acetyl-α-D-mannopyranosyl)-(1->3)-O-<(2,3,4-tri-O-acetyl-β-D-xylopyranosyl)-(1->2)>-O-(4,6-di-O-benzyl-β-D-mannopyranosyl)-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside