5-Nitro-4-methylamino-3-methyl-uracil 、 tert-butyl (2R,5S)-2,5-diethylpiperazine-1-carboxylate 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以82 %的产率得到tert-butyl (2R,5S)-2,5-diethyl-4-(1-methyl-6-(methylamino)-5-nitro-2-oxo-1,2-dihydropyrimidin-4-yl)piperazine-1-carboxylate