3-chloro-6-[(difluoromethyl)oxy]-8-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxylic acid 、
1-cyclobutyl-2-piperazinone hydrochloride 在
N,N-二异丙基乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 2.5h,
以81%的产率得到4-{[3-chloro-6-[(difluoromethyl)oxy]-8-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]carbonyl}-1-cyclobutyl-2-piperazinone