((S)-1-{(S)-1-[2-(4-Fluoro-3-nitro-phenyl)-ethylcarbamoyl]-2-phenyl-ethylcarbamoyl}-2-hydroxy-ethyl)-carbamic acid tert-butyl ester 在
molecular sieve 、
四丁基氟化铵 作用下,
以
四氢呋喃 为溶剂,
以48%的产率得到(S)-5-Benzyl-13-nitro-3-[2-oxo-oxazolidin-(4E)-ylidene]-2-oxa-4,7-diaza-bicyclo[8.2.2]tetradeca-1(13),10(14),11-trien-6-one