3-amino-4-trifluoromethyl-indazole-2-carboxylic acid ethyl ester 以
焦碳酸二乙酯 为溶剂,
反应 0.17h,
以Analogously to Example 1, 0.06 mol of 3-amino-4-trifluoromethylindazole in 50 ml of pyrocarbonic acid diethyl ester gives 3-amino-4-trifluoromethylindazole-2-carboxylic acid ethyl ester (melting point: 100°-101° C; 85% of theory) in 10 minutes at 20° C.的产率得到4-(trifluoromethyl)-1H-indazol-3-amine