1: NaOH, zinc dust / H2O; ethanol / 1 h / Heating 2: 78 percent / ammonium acetate, potassium ferricyanide / H2O; tetrahydrofuran / 240 h / 45 °C View Scheme

1: NaOH, zinc dust / H2O; ethanol / 1 h / Heating 2: 78 percent / ammonium acetate, potassium ferricyanide / H2O; tetrahydrofuran / 240 h / 45 °C 3: 75 percent / ascorbic acid / H2O; methanol View Scheme

sodium hydroxide; zinc in ethanol; water 1 h; Heating;

1: NaOH, zinc dust / H2O; ethanol / 1 h / Heating 2: 1 percent / ammonium acetate, potassium ferricyanide / H2O; tetrahydrofuran / 240 h / 45 °C View Scheme