1: 80 percent / pyridinium chlorochromate / CH2Cl2 / 3 h / Ambient temperature 2: 1.) hydrazine, 2.) 40percent NaOH / 1.) diethylene glycol, 1 h, reflux, 2.) a) 0 deg C, b) 30 min, 50-60 deg C, c) 1 h, reflux View Scheme

lithium aluminium tetrahydride in tetrahydrofuran

1: DDQ / benzene / Heating 2: LiAlH4 / tetrahydrofuran View Scheme

pyridinium chlorochromate in dichloromethane 3 h; Ambient temperature;