1: 42 percent / H2O / 14 h / 60 °C 2: 96 percent / acetic acid; H2 / Pd(OH)2/C / methanol / 12 h / 20 °C / atmospheric pressure 3: pyridine / CH2Cl2 / 0.5 h / 0 °C 4: CH2Cl2 / 0.5 h / 0 °C 5: H2 / Pd(OH)2/C / methanol / 20 h / 20 °C / 26600 Torr View Scheme

With  urea hydrogen peroxide addition compound; methyltrioxorhenium (VII); magnesium sulfate in  methanol T=20°C; 24 h;   

With  dihydrogen peroxide; methyltrioxorhenium (VII) in  ethanol 0.5 h;  Ambient temperature;