1: 90 percent / NIS, TfOH, MS 4A / CH2Cl2 / 0.17 h / -35 °C 2: 66 percent / 50percent aq. AcOH / 24 h / 40 °C 3: 54 percent / H2 / Raney-Ni (W4) / ethanol 4: 99 percent / mCPBA / CHCl3 / 0.17 h / 25 °C 5: 58 percent / (n-Bu3Sn)2O, Br2 / CH2Cl2 / 24 h / 25 °C 6: 84 percent / H2 / Raney-Ni (W4) / ethanol / 1 h / 25 °C View Scheme