Yield given. Multistep reaction;

1: 89 percent / imidazole / dimethylformamide / 12 h / Ambient temperature 2: 71 percent / PPh3, DEAD / benzene / 12 h / Ambient temperature 3: 73 percent / DIBAL-H / CH2Cl2; hexane / 3 h / -20 °C 4: 80 percent / pyridinium p-toluenesulfonate / CH2Cl2 / Ambient temperature 5: 95 percent / Bu4NF / tetrahydrofuran / 0.25 h 6: NaHCO3, NaIO4, RuCl3 / acetonitrile; CCl4; H2O / 48 h / Ambient temperature 7: diethyl ether 8: 100 percent / H3O+ View Scheme