in toluene 5 h; Ambient temperature;

1: 71 percent / K2CO3 / acetonitrile / 6 h / Heating 2: 40 percent / KI / acetonitrile / 24 h / Heating 3: 70 percent / 2 N HCl / 5 h / Heating 4: 79 percent / toluene / 5 h / Ambient temperature 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: 71 percent / K2CO3 / acetonitrile / 6 h / Heating 4: 40 percent / KI / acetonitrile / 24 h / Heating 5: 70 percent / 2 N HCl / 5 h / Heating 6: 79 percent / toluene / 5 h / Ambient temperature View Scheme

1: 75 percent / aq. AcOH, HCl(g) / 0.5 h / 90 °C 2: 71 percent / K2CO3 / acetonitrile / 6 h / Heating 3: 40 percent / KI / acetonitrile / 24 h / Heating 4: 70 percent / 2 N HCl / 5 h / Heating 5: 79 percent / toluene / 5 h / Ambient temperature View Scheme

1: 40 percent / KI / acetonitrile / 24 h / Heating 2: 70 percent / 2 N HCl / 5 h / Heating 3: 79 percent / toluene / 5 h / Ambient temperature View Scheme

1: 70 percent / 2 N HCl / 5 h / Heating 2: 79 percent / toluene / 5 h / Ambient temperature View Scheme