1: KHCO3, Na2SO4 / 24 h 2: 1.) n-BuLi / 1.) ether, THF, from -78 deg C to -20 deg C, 1 h, 2.) from -78 deg C to 0 deg C 3: 95 percent / hydrazine, acetic acid / aq. ethanol / 3 h / 25 °C 4: 77 percent / LiAlH4 / diethyl ether / 3 h / Ambient temperature View Scheme

potassium hydrogencarbonate; sodium sulfate 24 h; Yield given;