3-三氟甲基吡唑-4-羧酸乙酯 、
1-(5-ethylpyrimidin-2-yl)piperidin-4-yl methanesulfonate 、 4-(3-Methanesulfonyloxymethyl-[1,2,4]triazol-1-yl)-piperidine-1-carboxylic acid tert-butyl ester 以The reaction afforded two regioisomers, ethyl 1-(1-(5-ethylpyrimidin-2-yl)piperidin-4-yl)-3-(trifluoromethyl)-1H-pyrazole-4-carboxylate and ethyl 1-(1-(5-ethylpyrimidin-2-yl)piperidin-4-yl)-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate which的产率得到ethyl 1-(1-(5-ethylpyrimidin-2-yl)piperidin-4-yl)-3-(trifluoromethyl)-1H-pyrazole-4-carboxylate