反应条件
1: 51 percent / 1.) BuLi / diethyl ether; hexane / 1.) -60 deg C, 1 h, 2.) -40 to -30 deg C, 50 min, 3.) to room temperature, 2.5 h
2: conc. H2SO4, Ac2O / 0.5 h / Heating
3: 70 percent / ClCOOCH2CCl3 / benzene / 2 h / Heating
4: 41 percent / dimethylformamide / 3 h / 80 °C
5: 1.25 g / H2NNH2*H2O / methanol / 5 h / 60 °C
View Scheme
