nitrosyl chloride in tetrahydrofuran; pyridine T=-20°C; 2.5 h;

1: 24 percent / hydroxylamine hydrochloride, 15percent aq. NaOH / aq. ethanol / 120 h / Heating 2: 41 percent / nitrosyl chloride / tetrahydrofuran; pyridine / 2.5 h / -20 °C View Scheme

ammonia in tetrahydrofuran T=0°C; 4 h;