1.1: 93 percent / Dess-Martin periodinane / CH2Cl2 / 0.33 h / 20 °C 2.1: 95 percent / CF3COOH / CH2Cl2 / 0.5 h / 23 °C 3.1: 96 percent / K2CO3; MeOH / 1 h / 20 °C 4.1: 95 percent / DMAP; EDCl / CH2Cl2 / 1 h / 20 °C 5.1: CF3COOH / 2,2,2-trifluoro-ethanol / 3 h / 20 °C 6.1: 143 mg / pyridine; DMAP / CH2Cl2 / 0.5 h / 23 °C 7.1: 87 percent / n-Bu3SnH; AcOH; Pd(PPh3)2Cl2 / CH2Cl2 / 0.33 h / 20 °C 8.1: 97 percent / NaBH3CN; AcOH / acetonitrile; methanol / 2 h / 23 °C 9.1: 92 percent / Zn; AcOH / diethyl ether / 1 h / 23 °C 10.1: 4-formyl-1-methylpyridinium benzenesulfonate / CH2Cl2; dimethylformamide / 0.17 h / 23 °C 10.2: DBU / CH2Cl2; dimethylformamide / 0.25 h / 23 °C 10.3: 53 percent / aq. oxalic acid / CH2Cl2; dimethylformamide / 0.5 h / 23 °C 11.1: 97 percent / NaOAc / ethanol / 3 h / 23 °C 12.1: 92 percent / aq. AgNO3 / acetonitrile / 19 h / 23 °C View Scheme