manganese(IV) oxide; sodium hydroxide in water 0.833333 h; pH 6; Yield given;

Multi-step reaction with 2 steps 1: 13.6 g / H2 / 5percent Pd/C / aq. ethanol / 2327.2 Torr2: HCl / ethanol / 1.) 25 deg C, 5 h, 2.) reflux, 1.5 h  

With  hydrogenchloride in  ethanol  1.) 25 deg C, 5 h, 2.) reflux, 1.5 h;