1: 59 percent / conc. H2SO4; KNO3 / 2 h / 120 °C 2: 91 percent / H2 / Raney Ni / ethanol / 3 h / 2068.59 Torr 3: 83 percent / conc. H2SO4; KNO3 / 0 - 20 °C 4: 90 percent / conc. H2SO4 / 20 °C 5: 94 percent / H2 / Raney Ni / ethanol View Scheme

1: 59 percent / conc. H2SO4; KNO3 / 2 h / 120 °C 2: 91 percent / H2 / Raney Ni / ethanol / 3 h / 2068.59 Torr 3: 83 percent / conc. H2SO4; KNO3 / 0 - 20 °C 4: 90 percent / conc. H2SO4 / 20 °C View Scheme

1: 59 percent / conc. H2SO4; KNO3 / 2 h / 120 °C 2: 91 percent / H2 / Raney Ni / ethanol / 3 h / 2068.59 Torr View Scheme

1.1: potassium nitrate; sulfuric acid / 2 h / 120 °C 1.2: 15 °C / Cooling with ice 2.1: hydrogen / Raney nickel / ethanol / 3 h / 2068.65 Torr 3.1: potassium nitrate; sulfuric acid / 1.17 h / 0 - 20 °C 3.2: 12 h / 20 °C 3.3: 5 °C / Cooling with ice 4.1: hydrogen / Raney nickel / ethanol / 2 h / 1861.78 Torr 5.1: oxygen; anhydrous iron chloride / 1,4-dioxane; ethanol / 10 h / 75 °C 5.2: Cooling with ice 6.1: trimethylsilyl bromide / anhydrous propionitrile / 12 h / 120 °C 6.2: 23 °C / Cooling with ice View Scheme

1: With dihydrogen peroxide; trifluoroacetic acid in water T=70 - 75°C; 2: With ammonium hydroxide in dichloromethane; water

1: 59 percent / conc. H2SO4; KNO3 / 2 h / 120 °C 2: 91 percent / H2 / Raney Ni / ethanol / 3 h / 2068.59 Torr 3: 83 percent / conc. H2SO4; KNO3 / 0 - 20 °C 4: 90 percent / conc. H2SO4 / 20 °C 5: 94 percent / H2 / Raney Ni / ethanol View Scheme

sulfuric acid; potassium nitrate T=120°C; 2 h;

1: 59 percent / conc. H2SO4; KNO3 / 2 h / 120 °C 2: 91 percent / H2 / Raney Ni / ethanol / 3 h / 2068.59 Torr 3: 83 percent / conc. H2SO4; KNO3 / 0 - 20 °C View Scheme