potassium carbonate in dimethyl sulfoxide 18 h; Ambient temperature;

1: 58 percent / aq. HCl / 18 h / Heating 2: 60 percent / dimethylformamide / Ambient temperature; overnight 3: t-BuOK / dimethylformamide / 5 h / 80 °C 4: NH3 / methanol / 16 h / Ambient temperature View Scheme

hydrogenchloride 18 h; Heating;