benzyl 2(S)-azido-3(R)-hydroxy-3-[(3'R,5'S)-7'-oxo-1'-aza-4'-oxabicyclo[3.2.0]hept-3'-yl]propionate 、 1,2-O-isopropylidene-5-O-triphenylmethyl-D-xylofuranose 、
碘甲烷 以
二甲基亚砜 为溶剂,
以81.9%的产率得到1,2-O-isopropylidene-3-O-methyl-5-O-triphenylmethyl-D-xylofuranose