3-amino-7-ethoxycarbonylamino-5-trifluoromethyl-indazole-1-carboxylic acid ethyl ester 以
N,N-二甲基甲酰胺 为溶剂,
反应 1.0h,
以Analogously to Example 24, 0.025 mol of 3-amino-5-trifluoromethyl-7-ethoxycarbonylaminoindazole-2-carboxylic acid ethyl ester in 30 ml of dimethylformamide gives 3-amino-5-trifluoromethyl-7-ethoxycarbonylaminoindazole-1-carboxylic acid ethyl ester (melting point: 236°-237° C; 65% of theory) in 1 hour at 155° C.的产率得到3-amino-5-trifluoromethyl-7-ethoxycarbonylaminoindazole-2-carboxylic acid ethyl ester