1: 1.40 g / cc. hydrochloric acid / H2O / 1 h / Heating 2: 1.8 g / stannous chloride dihydrate / HCl / 100 °C 3: 1.6 g / H2, KOH / Raney nickel / ethanol 4: 2.) sodium carbonate, deactivated Raney Ni / 1.) acetic acid, water (1:1), 15 min, warming; 2.) water, 70 deg C, 3 h View Scheme

hydrogenchloride