3-azidopropyl 3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranoside 、 phenyl 3-O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl)-4-O-acetyl-2,6-di-O-benzoyl-1-thio-β-D-galactopyranoside 在
二苯基亚砜 、 2,4,5-tri-tert-butylpyrimidine 、
trifluoromethanesulfonic acid anhydride 作用下,
以
二氯甲烷 为溶剂,
以69%的产率得到3-azido-1-O-{4-O-[3-O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl)-4-O-acetyl-2,6-di-O-benzoyl-β-D-dalactopyranosyl]-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl}propanol