hydrogen; platinum(IV) oxide in acetic acid

1: 1.) aq. NaOH; 2.) Ac2O / 1.) reflux 0.5 h; 2.) CH3CN, room temperature, 40 h 2: 1.) aq. KOH / 1.) reflux 1 h; 2.) acidify, reflux, 1 h; View Scheme