pyridinium p-toluenesulfonate in tetrahydrofuran; ethanol T=55 - 60°C; 48 h; Yield given;

1: 91 percent / H2 / PtO2 / 5 h 2: hexamethylphosphoric acid triamide / 8 h / Ambient temperature 3: pyridinium p-toluenesulfonate / tetrahydrofuran; ethanol / 48 h / 55 - 60 °C View Scheme

1: hexamethylphosphoric acid triamide / 8 h / Ambient temperature 2: pyridinium p-toluenesulfonate / tetrahydrofuran; ethanol / 48 h / 55 - 60 °C View Scheme

lithium aluminium tetrahydride in tetrahydrofuran 8 h; Heating; Yield given;