1: With sodium 2 h; RefluxInert atmosphere; 2: Inert atmosphere;

1: 2 h / 65 - 70 °C 2: 73 percent / H2O / -8 - -7 °C 3: 1.) 90percent H2SO4, 2.) NaNO2 / 1.) 120 deg C, 2 h, 2.) water, 20-25 deg C, 1 h, then 80 deg C, 1 h 4: 90 percent / Na / 2 h / Heating View Scheme

1: 48 percent / conc. HNO3, comc. H2SO4 / 2 h / 160 °C 2: 2 h / 65 - 70 °C 3: 73 percent / H2O / -8 - -7 °C 4: 1.) 90percent H2SO4, 2.) NaNO2 / 1.) 120 deg C, 2 h, 2.) water, 20-25 deg C, 1 h, then 80 deg C, 1 h 5: 90 percent / Na / 2 h / Heating View Scheme

1: 1.) 90percent H2SO4, 2.) NaNO2 / 1.) 120 deg C, 2 h, 2.) water, 20-25 deg C, 1 h, then 80 deg C, 1 h 2: 90 percent / Na / 2 h / Heating View Scheme

thionyl chloride 2 h; Heating;