potassium carbonate in acetonitrile 4 h; Heating;

1: 90 percent / HCl / ethanol / 20 h / Heating 2: 89 percent / CHCl3 / 2 h / Ambient temperature 3: 60 percent / K2CO3 / acetonitrile / 4 h / Heating View Scheme

1: 82 percent / hydroxylamine hydrochloride, conc. NaOH / ethanol; H2O / 6 h / Heating 2: 75 percent / aq. AcOH, HCl(g) / 0.5 h / 90 °C 3: 90 percent / HCl / ethanol / 20 h / Heating 4: 89 percent / CHCl3 / 2 h / Ambient temperature 5: 60 percent / K2CO3 / acetonitrile / 4 h / Heating View Scheme

1: 75 percent / aq. AcOH, HCl(g) / 0.5 h / 90 °C 2: 90 percent / HCl / ethanol / 20 h / Heating 3: 89 percent / CHCl3 / 2 h / Ambient temperature 4: 60 percent / K2CO3 / acetonitrile / 4 h / Heating View Scheme

1: 89 percent / CHCl3 / 2 h / Ambient temperature 2: 60 percent / K2CO3 / acetonitrile / 4 h / Heating View Scheme