O-(3,6-Di-O-benzoyl-2,4-di-O-benzyl-α-D-mannopyranosyl)trichloroacetimidate 、
4-pentenyl 2-O-acetyl-3,4,6-tri-O-benzyl-α-D-mannopyranosyl-(1->3)-2,4-di-O-benzyl-β-D-mannospyranoside 在
叔丁基二甲硅基三氟甲磺酸酯 作用下,
以
乙醚 为溶剂,
反应 0.5h,
以93%的产率得到4-pentenyl 2-O-acetyl-3,4,6-tri-O-benzyl-α-D-mannopyranosyl-(1->3)-[2,4-di-O-benzyl-3,6-di-O-benzoyl-α-D-mannospyranosyl-(1->6)]-2,4-di-O-benzyl-β-D-mannopyranoside