1: 94 percent / Hydrogen / Raney Nickel / dioxane 2: 70 percent / Potassium carbonate / 2.5 h / Heating View Scheme

1: 84 percent / Isoamyl nitrite; Copper (I)chloride; conc.HCl / various solvent(s) / 1 h / 55 - 60 °C 2: 96 percent / 78percent H2SO4 / acetic acid / Heating 3: 91 percent / POCl3, Hexamethyl phosphoric acid triamide / 3 h / 150 - 160 °C 4: 94 percent / Hydrogen / Raney Nickel / dioxane 5: 70 percent / Potassium carbonate / 2.5 h / Heating View Scheme

1: 96 percent / 78percent H2SO4 / acetic acid / Heating 2: 91 percent / POCl3, Hexamethyl phosphoric acid triamide / 3 h / 150 - 160 °C 3: 94 percent / Hydrogen / Raney Nickel / dioxane 4: 70 percent / Potassium carbonate / 2.5 h / Heating View Scheme

1: 91 percent / POCl3, Hexamethyl phosphoric acid triamide / 3 h / 150 - 160 °C 2: 94 percent / Hydrogen / Raney Nickel / dioxane 3: 70 percent / Potassium carbonate / 2.5 h / Heating View Scheme

1: 84 percent / Isoamyl nitrite; Copper (I)chloride; conc.HCl / various solvent(s) / 1 h / 55 - 60 °C 2: 96 percent / 78percent H2SO4 / acetic acid / Heating 3: 91 percent / POCl3, Hexamethyl phosphoric acid triamide / 3 h / 150 - 160 °C 4: 94 percent / Hydrogen / Raney Nickel / dioxane 5: 70 percent / Potassium carbonate / 2.5 h / Heating View Scheme

potassium carbonate 2.5 h; Heating;