4-azido-8-tert-butyldimethylsilyl-4-deoxy-2,3:5,6-di-O-isopropylidene-D-altro-D-threo-octitol 、
甲基磺酰氯 在
吡啶 、
4-二甲氨基吡啶 作用下,
以100%的产率得到4-azido-8-tert-butyldimethylsilyl-4-deoxy-2,3:5,6-di-O-isopropylidene-1,7-di-O-methanesulfonyl-D-altro-D-threo-octitol