sodium;(2S)-2-[[(2S,3R)-3-[tert-butyl(dimethyl)silyl]oxy-2-[[(2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]pent-4-enoyl]amino]butanoyl]amino]pent-4-enoate                                                                                                                                                              在
                                                                                                                                                                                 
N-溴代丁二酰亚胺(NBS)                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        以76%的产率得到{(S)-1-[(1S,2R)-1-((3S,5S)-5-Bromomethyl-2-oxo-tetrahydro-furan-3-ylcarbamoyl)-2-(tert-butyl-dimethyl-silanyloxy)-propylcarbamoyl]-but-3-enyl}-carbamic acid tert-butyl ester