ammonium hydroxide T=120°C; 5 h;

1: 90 percent / ethanol / 2 h / Heating 2: 77 percent / acetone / 8 h / Ambient temperature; Irradiation 3: 76 percent / P4S10 / pyridine / 10 h / 140 °C 4: 57 percent / aq. NH3 / 5 h / 120 °C View Scheme

1: 77 percent / acetone / 8 h / Ambient temperature; Irradiation 2: 76 percent / P4S10 / pyridine / 10 h / 140 °C 3: 57 percent / aq. NH3 / 5 h / 120 °C View Scheme

1: 76 percent / P4S10 / pyridine / 10 h / 140 °C 2: 57 percent / aq. NH3 / 5 h / 120 °C View Scheme