ethyl 5-(4-fluorophenyl)-1-methyl-1H-pyrazole-4-carboxylate 、
sodium hydroxide 、
盐酸 在
乙酸乙酯 、
3-(4-fluorophenyl)-1-methyl-1H-pyrazole-4-carboxylic acid 作用下,
以
乙醇 为溶剂,
反应 1.0h,
以to give a mixture (3:2.2 (mol/mol), 13.0 g, 100%) of 5-(4-fluorophenyl)-1-methyl-1H-pyrazole-4-carboxylic acid and 3-(4-fluorophenyl)-1-methyl-1H-pyrazole-4-carboxylic acid as a white powder的产率得到5-(4-fluorophenyl)-1-methyl-1H-pyrazole-4-carboxylic acid