1: 85 percent / sulfur acid / CH2Cl2 / 6 h / 25 °C / 1499.7 Torr 2: 100 percent / ammonium formate / 10percent Pd/C / methanol; tetrahydrofuran / 0.33 h / 0 - 5 °C View Scheme

With  sulfuric acid in  dichloromethane T=25°C; P=1499.7 Torr; 6 h;