、
2-[[(2S,5R,6R)-2-(2,2-dimethylpropanoyloxymethoxycarbonyl)-3,3-dimethyl-4,4,7-trioxo-4lambda6-thia-1-azabicyclo[3.2.0]heptan-6-yl]sulfamoyl]acetic acid 在
N-乙基吗啉 、 O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 3.0h,
以5%的产率得到2,2-dimethylpropanoyloxymethyl (2S,5R,6R)-6-[[2-[2-[2-[2-[2-[5-(dithiolan-3-yl)pentanoylamino]ethoxy]ethoxy]ethoxy]ethylamino]-2-oxoethyl]sulfonylamino]-3,3-dimethyl-4,4,7-trioxo-4lambda6-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate