5-fluoro-6-(trifluoromethyl)picolinic acid 、
(2S,5r)-1-boc-2,5-二甲基哌嗪 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
乙腈 为溶剂,
以84 %的产率得到tert-butyl (2S,5R)-4-(5-fluoro-6-(trifluoromethyl)picolinoyl)-2,5-dimethylpiperazine-1-carboxylate