1: ethanol / 18 h / Ambient temperature 2: KOH / ethanol / 44 h 3: 1.) Zn, HCl, 2.) NaOH, O2 / 1.) CH3COOH, 60 deg C, 1 h, 2.) water, ethanol, 4 h View Scheme

hydrogenchloride; sodium hydroxide; oxygen; zinc 1.) CH3COOH, 60 deg C, 1 h, 2.) water, ethanol, 4 h; Multistep reaction;

sodium dithionite in water