1: 78 percent / acetic acid, 30 percent H2O2 / tetrahydrofuran / 5 h / 0 °C 2: 89 percent / BF3*OEt2 / CH2Cl2 / 0.5 h / Ambient temperature 3: H2 / PtO2 / ethyl acetate / 2.5 h / 2068.6 Torr / Ambient temperature 4: 439.1 mg / Jones reagent / diethyl ether View Scheme

With  dihydrogen peroxide; acetic acid in  tetrahydrofuran T=0°C; 5 h;   

With  dimethylsulfide borane complex in  tetrahydrofuran 2.5 h;  Ambient temperature;