1: tetrahydrofuran; toluene; pyridine / -40 °C 2: H2 / Raney Ni / tetrahydrofuran / 1500.12 Torr 3: 70 percent / NaOAc / 60 °C 4: FeCl3*6H2O / CH2Cl2 / 0.33 h / 20 °C 5: pyridine / -20 °C 6: NaI / butan-2-one / 80 °C 7: 72 percent / aq. K2CO3 / methanol 8: 92 percent / ethanol / Heating View Scheme