phenyl 3-O-acetyl-2-azido-2-deoxy-6-O-t-butyldiphenylsilyl-1-thio-β-D-galactopyranoside 、
在
2,4,6-三甲基吡啶 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
反应 2.5h,
以81%的产率得到phenyl 2-azido-3-O-benzoyl-2,4,6-trideoxy-4-phthalimido-α-D-galactopyranosyl(1→4)-3-O-acetyl-2-azido-2-deoxy-6-O-t-butyldiphenylsilyl-1-thio-β-D-galactopyranoside