tetracarbonylbis(acetonitrile)tungsten; trimethylamine-N-oxide in dichloromethane; acetonitrile T=20°C; 40 h;

1: 99 percent / H2 / Pd/C / methanol 2: 39 percent / Na/Hg View Scheme

1: 95 percent / H2 / Pd/C / acetonitrile / Ambient temperature 2: 37 percent / 6percent sodium amalgam, disodium hydrogenphosphate, sodium dihydrogenphosphate / tetrahydrofuran; methanol / -78 °C 3: trimethylamine / CHCl3 / 3.5 h / Heating 4: methanol / CH2Cl2 / 0.17 h / Heating View Scheme