ethyl 7-ethoxy-4, 5-dihydro-1H-indazole-3-carboxylate 、
3,3-dimethylbutyl methanesulfonate 在
sodium hydride 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 4.0h,
生成 ethyl 2-(3,3-dimethylbutyl)-7-oxo-4,5,6,7-tetrahydro-2H-indazole-3-carboxylate 、 ethyl 1-(3,3-dimethylbutyl)-7-oxo-4,5,6,7-tetrahydro-1H-indazole-3-carboxylate