1: 92 percent / MsCl, Et3N / CH2Cl2 / Ambient temperature 2: 47 percent / OsO4, DABCO / tetrahydrofuran / 24 h / -40 °C 3: 92 percent / pyridinium p-toluenesulfonate / CH2Cl2 / 16 h / Ambient temperature 4: CH(NMe2)3 / 1 h / 100 °C 5: 2N HCl / tetrahydrofuran / 20 h / Ambient temperature 6: PCC / CH2Cl2 / 5 h / Ambient temperature 7: CH2Cl2 / 0.33 h / Ambient temperature 8: DBN / CH2Cl2 / 6 h / Ambient temperature 9: K2CO3, MeOH / 5 h / Ambient temperature 10: 1N HCl / tetrahydrofuran / 12 h / Ambient temperature 11: 49 percent / pyridine / 12 h / -20 °C 12: 73 percent / PCC / CH2Cl2 / 2 h / Ambient temperature View Scheme

1: 92 percent / MsCl, Et3N / CH2Cl2 / Ambient temperature 2: 47 percent / OsO4, DABCO / tetrahydrofuran / 24 h / -40 °C 3: 92 percent / pyridinium p-toluenesulfonate / CH2Cl2 / 16 h / Ambient temperature 4: CH(NMe2)3 / 1 h / 100 °C 5: 2N HCl / tetrahydrofuran / 20 h / Ambient temperature 6: PCC / CH2Cl2 / 5 h / Ambient temperature 7: CH2Cl2 / 0.33 h / Ambient temperature 8: DBN / CH2Cl2 / 6 h / Ambient temperature 9: K2CO3, MeOH / 5 h / Ambient temperature 10: 1N HCl / tetrahydrofuran / 12 h / Ambient temperature 11: 49 percent / pyridine / 12 h / -20 °C View Scheme