1: hydrogen; palladium 10 on activated carbon / ethyl acetate / 15001.5 Torr 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 0.5 h / 0 °C / |Inert atmosphere 3: triethylamine / dichloromethane / 0.5 h / 0 °C / |Inert atmosphere 4: sodium iodide / acetone / 0.25 h / 20 °C 5: N,N-dimethyl-formamide / 2 h / 20 °C / |Inert atmosphere 6: sodium hydroxide; water / 4 h / |Reflux View Scheme

1: hydrogen; palladium 10 on activated carbon / ethyl acetate / 15001.5 Torr 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 0.5 h / 0 °C / |Inert atmosphere View Scheme