barium sulfate; hydrogen; palladium on activated charcoal in tetrahydrofuran; ethanol P=760 Torr; Ambient temperature;

1: 60 percent / Br2 / CH2Cl2 / 19 h / Ambient temperature 2: 1 percent / 40percent aq. NaOH / tetrahydrofuran; 2-methyl-propan-2-ol / 1.25 h / Ambient temperature View Scheme

sodium hydroxide in tetrahydrofuran; tert-butyl alcohol 1.25 h; Ambient temperature; Yield given;

potassium hydroxide in tetrahydrofuran 1.25 h; Ambient temperature;