sodium hydroxide in tetrahydrofuran; ethanol 1 h; Heating;

1: 45 percent / bromine / acetic acid / 0.01 h 2: hydrogen bromide / acetic acid / 24 h / Ambient temperature 3: 99.3 percent / aq. NaOH / ethanol; tetrahydrofuran / 1 h / Heating View Scheme

1: hydrogen bromide / acetic acid / 24 h / Ambient temperature 2: 99.3 percent / aq. NaOH / ethanol; tetrahydrofuran / 1 h / Heating View Scheme