3-O-allyl-4,6-O-benzylidene-2-deoxy-2-trichloroacetamido-β-D-galactopyranosyl(1->4)-3,6-di-O-benzyl-2-deoxy-2-trichloroacetamido-D-glucopyranosyl (N-phenyl)trifluoroacetimidate 、 3,4,6-tri-O-benzyl-α-D-mannopyranosyl-(1->3)-[3,4,6-tri-O-benzyl-α-D-mannopyranosyl-(1->6)]-2,4-di-O-benzyl-β-D-mannopyranosyl-(1->4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl-(1->4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl azide 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以69%的产率得到3-O-allyl-4,6-O-benzylidene-2-deoxy-2-trichloroacetamido-β-D-galactopyranosyl-(1->4)-3,6-di-O-benzyl-2-deoxy-2-trichloroacetamido-β-D-glucopyranosyl-(1->2)-3,4,6-tri-O-benzyl-α-D-mannopyranosyl-(1->3)-[3-O-allyl-4,6-O-benzylidene-2-deoxy-2-trichloroacetamido-β-D-galactopyranosyl-(1->4)-3,6-di-O-benzyl-2-deoxy-2-trichloroacetamido-β-D-glucopyranosyl-(1->2)-3,4,6-tri-O-benzyl-α-D-mannopyranosyl-(1->6)]-2,4-di-O-benzyl-β-D-mannopyranosyl-(1->4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl-(1->4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl azide