1: 80 percent / Ambient temperature 2: dimethylformamide / 1) 120 deg C, 4 hod, 2) room temperature, overnight 3: conc. aq. HCl / 1 h / Heating View Scheme

1: dimethylformamide / 1) 120 deg C, 4 hod, 2) room temperature, overnight 2: conc. aq. HCl / 1 h / Heating View Scheme

hydrogenchloride 1 h; Heating; Yield given;