1: 95 percent / TBAF 2: 50 percent / KMnO4; DCH-18-crown-6 / CH2Cl2 3: 96 percent / 4 Angstroem molecular sieves; TsOH / benzene / 0.5 h / Heating 4: 92 percent / ethylene glycol; SmI2 / tetrahydrofuran / 0.5 h / 20 °C 5: 100 percent / H2 / 10percent Pd/C / ethanol / 1 h / 760.05 Torr 6: 59 percent / 4 Angstroem molecular sieves; TsOH / benzene / 0.5 h / Heating View Scheme