1: potassium fluoride; hydrogen peroxide / dimethylformamide; H2O / 18 h / 25 °C 2: hydrogen / [Ir(COD)(PCy3)Pyr]PF6 / CH2Cl2 / 20 h / 25 °C / 760 Torr 3: PPh3; DIAD / tetrahydrofuran / 2 h / 50 °C 4: KOH / ethane-1,2-diol; H2O / 20 h / 100 °C View Scheme