2-methylpropyl (2S)-2-[[[(2R,3S,4R,5R)-4-cyano-5-(2,4-dioxopyrimidin-1-yl)-3-hydroxy-4-methyloxolan-2-yl]methoxy-phenoxyphosphoryl]amino]propanoate 在
N-溴代丁二酰亚胺(NBS) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以85%的产率得到2-methylpropyl (2S)-2-[[[(2R,3S,4R,5R)-5-(5-bromo-2,4-dioxopyrimidin-1-yl)-4-cyano-3-hydroxy-4-methyloxolan-2-yl]methoxy-phenoxyphosphoryl]amino]propanoate