[(2S,4S)-4-(5-ethyl-2,4-dioxopyrimidin-1-yl)-1-(4-methylphenyl)sulfonylpyrrolidin-2-yl]methyl benzoate 在
N-溴代丁二酰亚胺(NBS) 、
三乙胺 作用下,
生成 [(2S,4S)-4-[5-[(E)-2-bromoethenyl]-2,4-dioxopyrimidin-1-yl]-1-(4-methylphenyl)sulfonylpyrrolidin-2-yl]methyl benzoate