sodium hydroxide; dihydrogen peroxide in methanol 15 h; Heating;

1: 1.) Mg / 1.) THF, room temperature, 1 h; 2.) THF, room temperature, 48 h 2: 61 percent / pyridinium dichromate / dimethylformamide / 9 h / Ambient temperature 3: 56 percent / CH3CO2NH4 / acetic acid / Heating 4: 99 percent / pyridinium hydrobromide perbromide / ethanol / 0.17 h / Ambient temperature 5: 86 percent / 1M BBr3 / CH2Cl2 / 12 h / -20 °C View Scheme