thionyl chloride T=85°C; Inert atmosphere;

1: 91 percent / Na / ethanol / 16 h / Heating 2: 70 percent / SnCl2*2H2O, 6 M HCl / 3 h / Heating 3: 51 percent / NaNO2, conc. H2SO4 / H2O / 0.5 h / 80 - 90 °C View Scheme

1: 91 percent / Na / ethanol / 16 h / Heating 2: 70 percent / SnCl2*2H2O, 6 M HCl / 3 h / Heating View Scheme

With  sodium in  ethanol 16 h;  Heating;