1: 73 percent / VO(acac)2; t-BuOOH / benzene; decane / 10 h / 20 °C 2: 72 percent / Et3N / CH2Cl2 / 1 h / -10 - -5 °C 3: NaBH4 / methanol / 5 h / 20 °C 4: 39 mg / PPTS / CH2Cl2 / 0.5 h / Heating 5: 90 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / CH2Cl2 / 18 h / 20 °C 6: 96 percent / Et3N / CH2Cl2 / 0.75 h / -78 °C 7: 76 percent / Li2CO3 / dimethylformamide / 5 h / 55 °C 8: 97 percent / (NH4)6Mo7O24; aq. H2O2 / aq. ethanol / 6 h / 20 °C 9: 47 percent / 1,8-diazabicyclo[5.4.0]undec-7-ene / benzene / 5 h / Heating 10: 76 percent / Na2HPO4; Na(Hg) / methanol / 0.42 h / -20 - -10 °C 11: 92 percent / aq. HCl / tetrahydrofuran / 5 h / 20 °C 12: 40 percent / SeO2/SiO2 / tetrahydrofuran / 2 h / 80 °C View Scheme