(4S,5R,6S)-3-(7-Methanesulfonyloxymethyl-9-oxo-9H-fluoren-3-yl)-4-methyl-7-oxo-6-((R)-1-triethylsilanyloxy-ethyl)-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 在
sodium iodide 作用下,
以
丙酮 为溶剂,
生成
(4-nitrophenyl)methyl (4S,5R,6S)-3-[7-(iodomethyl)-9-oxofluoren-3-yl]-4-methyl-7-oxo-6-[(1R)-1-triethylsilyloxyethyl]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate