(2S)-2-[(2,4-difluorophenyl)methyl]butan-1-amine 、 5-Hydroxy-1-methyl-1H-1,2,4-triazole-3-carboxylic acid 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以27 %的产率得到(S)-N-(2-(2,4-difluorobenzyl)butyl)-1-methyl-5-oxo-4,5-dihydro-1H-1,2,4-triazole-3-carboxamide