1: With AlCl3, aluminium chloride in toluene T=50°C; 2: With Celite; water in toluene T=10°C; 15 h; 3: With sodium hydroxide; water in dichloromethane; toluene T=10°C; 1.25 h; Product distribution / selectivity;

1: With AlCl3, aluminium chloride in toluene T=90°C; 3 h; 2: With Celite; water in toluene T=10°C; 15 h; 3: With sodium hydroxide; water in dichloromethane; toluene T=10°C; 1.25 h; Product distribution / selectivity;

1.1: hydrogenchloride; acetic acid; sodium nitrite / water / 0 - 5 °C 1.2: -5 - 0 °C 2.1: AlCl3, aluminium chloride / toluene / 70 - 90 °C View Scheme