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

Multi-step reaction with 3 steps 1: 96 percent / 78percent H2SO4 / acetic acid / Heating2: 91 percent / POCl3, Hexamethyl phosphoric acid triamide / 3 h / 150 - 160 °C3: 94 percent / Hydrogen / Raney Nickel / dioxane  

With  sulfuric acid in  acetic acid  Heating;