1: tetrahydrofuran; toluene; pyridine / -40 °C 2: H2 / Pd on CaCO3 / tetrahydrofuran / 1500.12 Torr 3: K2CO3 / methanol 4: DEAD; PPh3 / tetrahydrofuran / 0 °C 5: aq. K2CO3 / methanol 6: 70 percent / NaOAc / 60 °C 7: FeCl3*6H2O / CH2Cl2 / 0.33 h / 20 °C 8: pyridine / -20 °C 9: NaI / butan-2-one / 80 °C 10: 72 percent / aq. K2CO3 / methanol 11: 92 percent / ethanol / Heating View Scheme