4-pentenyl 3-O-acetyl-2,4,6-tri-O-benzyl-α-D-mannopyranoside 、 methyl O-(3,4,6-tri-O-benzyl-α-D-mannopyranosyl)-(1<*>2)-O-(3,4,6-tri-O-benzyl-α-D-mannopyranosyl)-(1<*>3)-2,4,6-tri-O-benzyl-α-D-mannopyranoside 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 、 4 A molecular sieve 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以59%的产率得到methyl O-(3-O-acetyl-2,4,6-tri-O-benzyl-α-D-mannopyranosyl)-(1<*>2)-O-(3,4,6-tri-O-benzyl-α-D-mannopyranosyl)-(1<*>2)-O-(3,4,6-tri-O-benzyl-α-D-mannopyranosyl)-(1<*>3)-2,4,6-tri-O-benzyl-α-D-mannopyranoside