1.1: 89 percent / 4-methylmorpholine N-oxide; tetrapropylammonium perruthenate / CH2Cl2 / 1 h / 20 °C 2.1: n-BuLi / tetrahydrofuran / 0.17 h / 0 °C 2.2: 78 percent / tetrahydrofuran / 20 °C 3.1: 76 percent / Oxone; OsO4 / dimethylformamide / 0.75 h / 20 °C View Scheme