aluminium trichloride in benzene T=50°C; 0.5 h;

Multi-step reaction with 4 steps 1: 90 percent / hydroiodic acid / acetic acid / 2 h / Heating2: 45 percent / nitric acid, concd. sulfuric acid / acetic anhydride / 2 h / 15 - 20 °C3: 98 percent / CaCl2, zinc / ethanol; H2O / 2 h / Heating4: 93 percent / benzene / 0.33 h / 40 - 50 °C  

Multi-step reaction with 4 steps 1: 95 percent / copper / 4 h / 230 °C2: 45 percent / nitric acid, concd. sulfuric acid / acetic anhydride / 2 h / 15 - 20 °C3: 98 percent / CaCl2, zinc / ethanol; H2O / 2 h / Heating4: 93 percent / benzene / 0.33 h / 40 - 50 °C  

Multi-step reaction with 2 steps 1: 98 percent / CaCl2, zinc / ethanol; H2O / 2 h / Heating2: 93 percent / benzene / 0.33 h / 40 - 50 °C