1: 56 percent / CH3CO2NH4 / acetic acid / Heating 2: 99 percent / pyridinium hydrobromide perbromide / ethanol / 0.17 h / Ambient temperature 3: 86 percent / 1M BBr3 / CH2Cl2 / 12 h / -20 °C View Scheme

With  dipyridinium dichromate in  N,N-dimethyl-formamide 9 h;  Ambient temperature;   

With  hydrogenchloride; acetic acid  1.) water, 3 d, RT; 2.) water, 3 d, RT;  Yield given. Multistep reaction;