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 在
sodium methylate 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
反应 1.5h,
以89%的产率得到4-pentenyl 3,4,6-tri-O-benzyl-α-D-mannopyranosyl-(1->3)-[2,4-di-O-benzyl-α-D-mannospyranosyl-(1->6)]-2,4-di-O-benzyl-β-D-mannopyranoside