sodium in ethanol Ambient temperature;

thionyl chloride 1.) -5 deg C, 1 h, 2.) 40 deg C, 2 h;

1: 98 percent / conc. HCl / H2O / 2 h / Heating 2: 95 percent / thionyl chloride / 1.) -5 deg C, 1 h, 2.) 40 deg C, 2 h View Scheme

1: 84 percent / hydroxylamine hydrochloride, 1.3 M aq. potassium carbonate / ethanol / 2 h / 50 °C 2: 70 percent / H2SO4 / H2O / 110 °C 3: 98 percent / conc. HCl / H2O / 2 h / Heating 4: 95 percent / thionyl chloride / 1.) -5 deg C, 1 h, 2.) 40 deg C, 2 h View Scheme

1: 70 percent / H2SO4 / H2O / 110 °C 2: 98 percent / conc. HCl / H2O / 2 h / Heating 3: 95 percent / thionyl chloride / 1.) -5 deg C, 1 h, 2.) 40 deg C, 2 h View Scheme