bromine in chloroform T=0 - 23°C; 0.0833333 h;

1: 2 h / 100 °C 2: bromine / chloroform / 0.08 h / 0 - 23 °C View Scheme

1: boron tribromide / dichloromethane / 1 h / -78 - 23 °C 2: 2 h / 100 °C 3: bromine / chloroform / 0.08 h / 0 - 23 °C View Scheme

1.1: tetrahydrofuran / 6 h / Reflux 1.2: 20 h / 75 °C 2.1: boron tribromide / dichloromethane / 1 h / -78 - 23 °C 3.1: 2 h / 100 °C 4.1: bromine / chloroform / 0.08 h / 0 - 23 °C View Scheme