O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1->4)-O-(2-acetamido-3,6-di-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->2)-3,4,6-tri-O-benzyl-α-D-mannopyranosyl trichloroacetimidate 、
8-ethoxycarbonyloctyl O-(2,3,4,6-tetra-O-benzyl-α-D-mannopyranosyl)-(1->6)-2,4-di-O-benzyl-β-D-mannopyranoside 在
3 A molecular sieve 、
三氟化硼乙醚 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 1.0h,
以45%的产率得到8-ethoxycarbonyloctyl O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1->4)-O-(2-acetamido-3,6-di-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->2)-O-(3,4,6-tri-O-benzyl-α-D-mannopyranosyl)-(1->3)-O-<2,3,4,6-tetra-O-benzyl-α-D-mannopyranosyl-(1->6)>-...