3,5-dichloro-2-(chloromethyl)pyridine 、 ethyl (5RS,6RS)-3-oxo-6-(trifluoromethyl)-2,3,5,6,7,8-hexahydro[1,2,4]triazolo[4,3-a]pyridine-5-carboxylate 在
caesium carbonate 作用下,
以
乙腈 为溶剂,
生成 ethyl (5RS,6RS)-2-[(3,5-dichloropyridin-2-yl)methyl]-3-oxo-6-(trifluoromethyl)-2,3,5,6,7,8-hexahydro[1,2,4]triazolo[4,3-a]pyridine-5-carboxylate