1: With bromine in chloroform T=20°C; 60 h; 2: With water; sodium hydrogencarbonate in chloroform

1.1: 1.5 h / Reflux 1.2: pH 12 2.1: bromine / chloroform / 60 h / 20 °C View Scheme

1: With phosphoric acid; nitric acid; sodium nitrite in water T=-5°C; 0.833333 h; 2: With hypophosphorous acid in water T=-5 - 20°C; 20.5 h; 3: With sodium hydroxide; water T=0°C;