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

1: 70 percent / HNO3, H2SO4 / 1 h / Ambient temperature 2: 70 percent / H2 / Raney-Ni / ethanol / 1 h 3: 9 percent / Na2Cr2O7*2H2O, 2N aq.H2SO4 / 48 h View Scheme

1: 70 percent / H2 / Raney-Ni / ethanol / 1 h 2: 9 percent / Na2Cr2O7*2H2O, 2N aq.H2SO4 / 48 h View Scheme

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 3: 80 percent / ammonia / tetrahydrofuran / 4 h / 0 °C View Scheme

1: 41 percent / nitrosyl chloride / tetrahydrofuran; pyridine / 2.5 h / -20 °C 2: 80 percent / ammonia / tetrahydrofuran / 4 h / 0 °C View Scheme

sodium dichromate; sulfuric acid 48 h;