1: NaH / dimethylformamide / 3 h / Ambient temperature 2: 45 percent / liq. NH3, Na metal / tetrahydrofuran / 3 h / -30 °C 3: 1.) NaIO4, 2.) CaCO3 / 1.) H2O, RT, 16 h, 2.) RT, 24 h, View Scheme

1: NaH / dimethylformamide / 3 h / Ambient temperature 2: 45 percent / liq. NH3, Na metal / tetrahydrofuran / 3 h / -30 °C View Scheme