2,5-anhydro-1-azido-1,4-dideoxy-3-thio-D-threo-pentitol 3-acetate 在
sodium methylate 、
N,N-二异丙基乙胺 作用下,
以
甲醇 、
乙腈 为溶剂,
生成 (4R,5S,6S)-3-((2R,3R)-2-Azidomethyl-tetrahydro-furan-3-ylsulfanyl)-6-((R)-1-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester