1: 71 percent / TiCl4 / CH2Cl2 / 15 h / -78 °C 2: OsO4; 4-methylmorpholine N-oxide / 2-methyl-propan-2-ol; tetrahydrofuran; H2O / 3 h / 20 °C 3: 45 mg / NaHCO3; NaIO4 / tetrahydrofuran; H2O / 3 h / 20 °C 4: 81 percent / hydrogen / 10 percent Pd/C / ethyl acetate / 24 h / 20 °C View Scheme