1: 83 percent / methanol; tetrahydrofuran / 24 h / Ambient temperature 2: 91 percent / H2, aq. NaOH / 10percent Pd/C / methanol / 12 h / 2068.6 Torr / Ambient temperature 3: 84 percent / KOH / H2O / 3 h / Heating View Scheme