iron; acetic acid in methanol 2 h; Heating; Yield given;

1: 79 percent / dicyclohexylcarbodiimide / tetrahydrofuran / Ambient temperature 2: 1.) NaH / 1.) THF, RT, 1 h, 2.) THF, overnight 3: aq. HCl / acetone / 6 h / Ambient temperature 4: Fe, AcOH / methanol / 2 h / Heating View Scheme

1: 1.) NaH / 1.) THF, RT, 1 h, 2.) THF, overnight 2: aq. HCl / acetone / 6 h / Ambient temperature 3: Fe, AcOH / methanol / 2 h / Heating View Scheme

1: aq. HCl / acetone / 6 h / Ambient temperature 2: Fe, AcOH / methanol / 2 h / Heating View Scheme