1: 87 percent / NaOAc; zinc dust / 0.25 h / Heating 2: 64 percent / K2CO3; Na2S2O4 / H2O; methanol / 96 h / 29 °C 3: 70 percent / K2CO3 / acetone / 6 h / 29 °C 4: 80 percent / NaOH; Na2S2O4 / methanol; H2O / 24 h / 20 °C 5: 60 percent / K2CO3 / acetone / 12 h / 29 °C 6: HBF4*Et2O / CH2Cl2 / 0.03 h / 0 - 5 °C 7: 0.026 g / SeO2 / CHCl3 / 12 h / 20 °C View Scheme