1: 85 percent / K2CO3 / acetone / 10 h / Heating 2: 74 percent / LDA / tetrahydrofuran / 1.5 h / -78 °C 3: 80 percent / NaBH4, K2CO3 / methanol / 0.5 h / 25 °C 4: 95 percent / (NH4)2Ce(NO3)6 / acetonitrile; H2O / 0.25 h / 25 °C 5: K2CO3 / dimethylformamide 6: aq. Na2S2O4 7: K2CO3 / acetone / 6 h / Heating 8: aq. KOH / ethanol / 10 h / 25 °C 9: PPE / CHCl3 / 36 h / 25 °C 10: aq. KOH / ethanol / 8 h / 25 °C 12: PCC / CH2Cl2 / 15 h / 25 °C 13: 82 percent / K2CO3 / methanol / 36 h / 25 °C 14: 95 percent / ceric ammonium nitrate / acetonitrile; H2O 15: 85 percent / Et3N*BCl3 / CH2Cl2 / 0.25 h / 0 °C View Scheme

1: 85 percent / K2CO3 / acetone / 10 h / Heating 2: 74 percent / LDA / tetrahydrofuran / 1.5 h / -78 °C 3: 80 percent / NaBH4, K2CO3 / methanol / 0.5 h / 25 °C 4: 95 percent / (NH4)2Ce(NO3)6 / acetonitrile; H2O / 0.25 h / 25 °C 5: K2CO3 / dimethylformamide 6: aq. Na2S2O4 7: K2CO3 / acetone / 6 h / Heating 8: aq. KOH / ethanol / 10 h / 25 °C 9: PPE / CHCl3 / 36 h / 25 °C 10: aq. KOH / ethanol / 8 h / 25 °C 12: PCC / CH2Cl2 / 15 h / 25 °C 13: 82 percent / K2CO3 / methanol / 36 h / 25 °C 14: 95 percent / ceric ammonium nitrate / acetonitrile; H2O 15: 85 percent / Et3N*BCl3 / CH2Cl2 / 0.25 h / 0 °C 16: NaBH4 View Scheme