3-[(2S,3R,4R,5S,6S)-5-(tert-butyldimethylsilyloxy)-2-methanesulfonyloxymethyl-6-methoxy-3-pivaloyloxymethyltetrahydropyran-4-yl]propyl pivalate 在
lithium bromide 作用下,
以
various solvent(s) 为溶剂,
以78%的产率得到3-[(2S,3R,4R,5S,6S)-2-bromomethyl-5-(tert-butyldimethylsilyloxy)-6-methoxy-3-pivaloyloxymethyltetrahydropyran-4-yl]propyl pivalate