methyl 5-N-acetamido-7-N-ethylacetamido-4-mono-O-acetyl-3,5,7-trideoxy-3-fluoro-D-erythro-α-L-manno-2-heptapyranosonate 在
二乙胺基三氟化硫 作用下,
以
二氯甲烷 为溶剂,
以50%的产率得到methyl 5-N-acetamido-2,3,5,7-tetradeoxy-4-mono-O-acetyl-2,3-difluoro-7-ethylacetamido-α-L-manno-2-heptapyranosonate