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