(Z)-2,5-difluoro-N'-hydroxy-4-methyl-3-nitrobenzimidamide 、
(3S)-1-methoxycarbonylpyrrolidine-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72 %的产率得到methyl (S,Z)-3-(((2,5-difluoro-4-methyl-3-nitrophenyl)(hydroxyimino)methyl)carbamoyl)pyrrolidine-1-carboxylate