1: CH2Cl2; methanol 2: 90 percent / Pb(OAc)4 / benzene 3: 72 percent / p-TsOH / not given / Ambient temperature 4: 85 percent / Raney Ni (Wl) / ethanol; ethyl acetate 5: CH2Cl2 / -78 °C 6: 49 percent / O3, / ethyl acetate; pyridine / -78 °C 7: 83 percent / LiAlH4 / not given 9: propan-2-ol; xylene / 0 °C / Irradiation 10: 71 percent / OsO4, tert-butyl-hydroperoxide, (Et)4NOH / acetone / 50 °C 12: Li-HMDS / tetrahydrofuran / Ambient temperature 13: 80 percent 15: mesitylenesulfonylchloride / pyridine 17: Li / various solvent(s) View Scheme