hydrogenchloride T=100°C; 0.5 h;

1: Bu4N+Br-, aq. sodium hydroxide / benzene / 0.5 h / Heating 2: 73 percent / aq. HCl / 0.5 h / 100 °C View Scheme

1: 60 percent / 1.) Oct4N+Br-, potassium hydroxide / 1.) room temperature, 10 min, 2.) 100 deg C, 5 h 2: Bu4N+Br-, aq. sodium hydroxide / benzene / 0.5 h / Heating 3: 73 percent / aq. HCl / 0.5 h / 100 °C View Scheme