1: 57 percent / HNO3, HOAc / 0.5 h / -10 °C 2: 17 percent / NH4Cl, Zn / dimethylformamide; ethanol; H2O / 1.5 h / Ambient temperature 3: diethyl ether / 0.5 h / -10 °C View Scheme

1: 17 percent / NH4Cl, Zn / dimethylformamide; ethanol; H2O / 1.5 h / Ambient temperature 2: diethyl ether / 0.5 h / -10 °C View Scheme

in diethyl ether T=-10°C; 0.5 h; Yield given;