1: 81 percent / konz. H2SO4/HNO3 2: 80 percent / Fe, Eisessig / 2 h View Scheme

1: 81 percent / konz. H2SO4/HNO3 2: 80 percent / Fe, Eisessig / 2 h 3: 85 percent / acetic anhydride / 5 h / Heating 4: 98 percent / konz. H2SO4, CrO3 / acetic acid / 1.5 h / 10 - 15 °C 5: 92 percent / 10percent HCl / 1 h / Heating View Scheme

1: 81 percent / konz. H2SO4/HNO3 2: 80 percent / Fe, Eisessig / 2 h 3: 85 percent / acetic anhydride / 5 h / Heating 4: 98 percent / konz. H2SO4, CrO3 / acetic acid / 1.5 h / 10 - 15 °C 5: 92 percent / 10percent HCl / 1 h / Heating 6: 78 percent / HBr, Eisessig, Pyridindibromid-hydrobromid / 60 °C 7: 98 percent / 1 h / 50 °C 8: 3percent NaOH / 1.5 h / Ambient temperature View Scheme

triethyl-amine; compound in 1,4-dioxane 2.5 h; Heating;

1: concentrated sulfuric acid; nitric acid / 75 - 100 °C 2: palladium/charcoal; ethanol / Hydrogenation View Scheme

1: 81 percent / konz. H2SO4/HNO3 2: 80 percent / Fe, Eisessig / 2 h 3: 85 percent / acetic anhydride / 5 h / Heating 4: 98 percent / konz. H2SO4, CrO3 / acetic acid / 1.5 h / 10 - 15 °C 5: 92 percent / 10percent HCl / 1 h / Heating 6: 78 percent / HBr, Eisessig, Pyridindibromid-hydrobromid / 60 °C 7: 98 percent / 1 h / 50 °C 8: 3percent NaOH / 1.5 h / Ambient temperature 9: konz. H2SO4 / 4 h / Heating 10: 85 percent / LiAlH4 / diethyl ether / 2 h View Scheme

sulfuric acid; nitric acid

dihydrogen peroxide; acetic acid in methanol 3 h; Reflux;

1: 81 percent / konz. H2SO4/HNO3 2: 80 percent / Fe, Eisessig / 2 h 3: 85 percent / acetic anhydride / 5 h / Heating 4: 98 percent / konz. H2SO4, CrO3 / acetic acid / 1.5 h / 10 - 15 °C 5: 92 percent / 10percent HCl / 1 h / Heating 6: 78 percent / HBr, Eisessig, Pyridindibromid-hydrobromid / 60 °C 7: 98 percent / 1 h / 50 °C 8: 3percent NaOH / 1.5 h / Ambient temperature 9: konz. H2SO4 / 4 h / Heating View Scheme

1: 81 percent / konz. H2SO4/HNO3 2: 80 percent / Fe, Eisessig / 2 h 3: 85 percent / acetic anhydride / 5 h / Heating View Scheme