benzyl 6-benzyl-3-chloro-3-ethylsulphinyl-7-oxo-1-azabicyclo[3.2.0]heptane-2-carboxylate 、
1,5-Diazabicyclo[5.4.0]undec-5-ene 在
Brine 、
Sodium sulfate-III 作用下,
以
乙酸乙酯 为溶剂,
反应 0.25h,
以Concentration of the solution gave benzyl 6-benzyl-3-ethylsulphinyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (80) (0.016 g) as a colourless gum的产率得到benzyl 6-benzyl-3-ethylsulphinyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate