bromine in chloroform T=20°C; 4 h;

1.1: AlCl3, aluminium chloride / 1,2-dichloro-benzene / 1 h / 8 - 10 °C 1.2: 2 h / 10 °C 1.3: 10 - 20 °C 2.1: bromine / chloroform / 4 h / 20 °C View Scheme