hydrogenchloride; hydrogen; platinum(IV) oxide in methanol; ethanol 5.5 h;

1: 90 percent / NaH / toluene; dimethylformamide / 20 h / 110 °C 2: 0.5 g / BuLi / tetrahydrofuran; hexane / Ambient temperature 3: 40 percent / TBAF / acetonitrile / 0.17 h / Ambient temperature 4: 80 percent / H2, HCl / PtO2 / methanol; ethanol / 5.5 h View Scheme

1: 90 percent / NaH / toluene; dimethylformamide / 20 h / 110 °C 2: 0.5 g / BuLi / tetrahydrofuran; hexane / Ambient temperature 3: 40 percent / TBAF / acetonitrile / 0.17 h / Ambient temperature 4: 80 percent / H2, HCl / PtO2 / methanol; ethanol / 5.5 h View Scheme

1: 0.5 g / BuLi / tetrahydrofuran; hexane / Ambient temperature 2: 40 percent / TBAF / acetonitrile / 0.17 h / Ambient temperature 3: 80 percent / H2, HCl / PtO2 / methanol; ethanol / 5.5 h View Scheme

1: 40 percent / TBAF / acetonitrile / 0.17 h / Ambient temperature 2: 80 percent / H2, HCl / PtO2 / methanol; ethanol / 5.5 h View Scheme

1: O2, TBAF / acetonitrile / Ambient temperature 2: 80 percent / H2, HCl / PtO2 / methanol; ethanol / 5.5 h View Scheme