1: 25 g / N,N-dimethyl-acetamide / 4.5 h / Heating 2: 1.) Br2, 2.) CH3COOH / 1.) 125 deg C, irradiation, 2.5 h, 2.) reflux, 2 h 3: 66 percent / 48percent aq. HBr / 6 h / Heating View Scheme

1: 1.) Br2, 2.) CH3COOH / 1.) 125 deg C, irradiation, 2.5 h, 2.) reflux, 2 h 2: 66 percent / 48percent aq. HBr / 6 h / Heating View Scheme

ammonia in ethanol; water Ambient temperature;