反应详情

Analogously to Example 22, 0.04 mol of 3-amino-6-trifluoromethylindazole and 50 ml of pyrocarbonic acid diethyl ester in 25 ml of ethanol give 3-amino-6-trifluoromethylindazole-1-carboxylic acid ethyl ester (melting point: 168°-169° C; 64% of theory) in 2 hours at 80° C.