反应条件
1: 7-nitro-1H-indazole With trifluorormethanesulfonic acid in dichloromethane T=25 - 35°C; Inert atmosphere; 2: methyl 2,2,2-trichloroacetimidate in dichloromethane T=20°C; Inert atmosphere; regioselective reaction;
参考文献
Tetrahedron Letters, , vol. 54, # 13 p. 1661 - 1663