2-azido-2-deoxy-3,4-O-isopropylidene-6-O-tert-butyldiphenylsilyl-D-galactopyranosyl nitrate 在
lithium bromide 作用下,
以
乙腈 为溶剂,
反应 5.0h,
以96%的产率得到((3aR,4R,6R,7R,7aR)-7-Azido-6-bromo-2,2-dimethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-4-ylmethoxy)-tert-butyl-diphenyl-silane