1: NaH / tetrahydrofuran / 0 °C 2: HgO, BF3*Et2O / tetrahydrofuran; H2O / 0.5 h 3: 7.0 g / diethyl ether / 2 h / 0 °C 4: 86 percent / AcOH / H2O / 16 h 5: H2SO4 / tetrahydrofuran / 50 °C 6: 81 percent / KBr, AcO2H, NaOAc / acetic acid / 2 h / 10 °C 7: 77 percent / H2 / Pd/C / methanol View Scheme

1: NaH / tetrahydrofuran / 0 °C 2: HgO, BF3*Et2O / tetrahydrofuran; H2O / 0.5 h 3: 7.0 g / diethyl ether / 2 h / 0 °C 4: 86 percent / AcOH / H2O / 16 h 5: H2SO4 / tetrahydrofuran / 50 °C 6: 81 percent / KBr, AcO2H, NaOAc / acetic acid / 2 h / 10 °C 7: 95 percent / H2 / Pd/C / methanol View Scheme

1: NaH / tetrahydrofuran / 0 °C 2: HgO, BF3*Et2O / tetrahydrofuran; H2O / 0.5 h 3: 7.0 g / diethyl ether / 2 h / 0 °C 4: 86 percent / AcOH / H2O / 16 h 5: H2SO4 / tetrahydrofuran / 50 °C 6: 81 percent / KBr, AcO2H, NaOAc / acetic acid / 2 h / 10 °C View Scheme