4-硝基吡唑-5-羧酸乙酯 、
1-碘-3,3,3-三氟丙烷 在
silica gel 作用下,
以to yield 141 mg (31%) of the desired regioisomer and 68 mg (15%) of 4-nitro-1-(3,3,3-trifluoropropyl)-1H-pyrazole-3-carboxylic acid ethyl ester的产率得到4-nitro-1-(3,3,3-trifluoropropyl)-1H-pyrazole-3-carboxylic acid ethyl ester