2-(trifluoroacetylamino)ethyl (2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1->2)-(4,6-O-benzylidene-β-D-galactopyranosyl)-(1->4)-2-acetylamino-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranoside 、 3,4,6-tri-O-acetyl-2-azido-2-deoxy-β-D-galactopyranosyl chloride 在
4 A molecular sieve 、 silver perchlorate 、 silver carbonate 、
三氟乙酸 作用下,
以
二氯甲烷 、
氯仿 为溶剂,
反应 50.0h,
以52%的产率得到2-(trifluoroacetylamino)ethyl (2-azido-3,4,6-tri-O-acetyl-2-deoxy-α-D-galactopyranosyl)-(1->3)-[(2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1->2)-β-D-galactopyranosyl]-(1->4)-2-acetylamino-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranoside