benzyl O-(3-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1->3)-2,4-di-O-benzyl-6-deoxy-β-D-glucopyranoside 、 O-(2,3,4-tri-O-acetyl-β-D-fucopyranosyl)-(1->4)-<(2,3,4-tri-O-acetyl-β-D-xylopyranosyl)-(1->2)>-6-O-benzoyl-3-O-benzyl-α-D-glucopyranosyl trichloroacetimidate 在
4 A molecular sieve 、
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
生成 benzyl O-(2,3,4-tri-O-acetyl-β-D-fucopyranosyl)-(1->4)-<(2,3,4-tri-O-acetyl-β-D-xylopyranosyl)-(1->2)>-(6-O-benzoyl-3-O-benzyl-α-D-glucopyranosyl)-(1->4)-(3-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1->3)-2,4-di-O-benzyl-6-deoxy-β-D-glucopyranoside 、 benzyl O-(2,3,4-tri-O-acetyl-β-D-fucopyranosyl)-(1->4)-<(2,3,4-tri-O-acetyl-β-D-xylopyranosyl)-(1->2)>-(6-O-benzoyl-3-O-benzyl-β-D-glucopyranosyl)-(1->4)-(3-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1->3)-2,4-di-O-benzyl-6-deoxy-β-D-glucopyranoside