tert-butyldimethylsilyl 2-azido-2-deoxy-4,6-O-isopropylidene-β-D-galactopyranoside 、
2,3,4,6-四-O-乙酰基-Alpha-D-吡喃半乳糖酰基-2,2,2-三氯代亚氨乙酸酯 在
三氟化硼乙醚 作用下,
以
正己烷 、
二氯甲烷 为溶剂,
反应 1.0h,
以73%的产率得到Acetic acid (2R,3R,4S,5S,6R)-4,5-diacetoxy-6-acetoxymethyl-2-[(4aR,6S,7R,8R,8aR)-7-azido-6-(tert-butyl-dimethyl-silanyloxy)-2,2-dimethyl-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yloxy]-tetrahydro-pyran-3-yl ester