1.1: 100 percent / imidazole / tetrahydrofuran / 0.75 h / 0 °C 2.1: 95 percent / DIBAL-H / tetrahydrofuran; hexane / 1 h / -78 °C 3.1: 100 percent / nBu3P / tetrahydrofuran / 0.5 h / 0 °C 4.1: DMAP; H2O2 / tetrahydrofuran / 12 h / -44 - 23 °C 5.1: 95 percent / imidazole / tetrahydrofuran / 1.5 h / 0 °C 6.1: OsO4; NMO*H2O / tetrahydrofuran; H2O / 0 - 23 °C 6.2: 71 percent / Pb(OAc)4 / benzene / 0 - 23 °C 7.1: 91 percent / AcOH / tetrahydrofuran; H2O / 0 - 23 °C 8.1: 28 percent / Grela's catalyst / 1,2-dichloro-ethane / 10 h / 23 °C View Scheme