1: 70 percent / ruthenium carbene complex (5percent w/w) / toluene / 48 h / 110 °C 2: 1.) OsO4, N-methyl morfoline N-oxide; 2.) SOCl2 / 2.) TEA 3: NaIO4 / RuCl3 / H2O; acetonitrile; CH2Cl2 4: 1.) NaBH4; 2.) H2SO4 (20percent aq) / 1.) dimethyl acetamide; 2.) Et2O 5: BH3DMS, H2 / Pd/C View Scheme