1: 72 percent / p-TsOH / not given / Ambient temperature 2: 85 percent / Raney Ni (Wl) / ethanol; ethyl acetate 3: CH2Cl2 / -78 °C 4: 49 percent / O3, / ethyl acetate; pyridine / -78 °C 5: 83 percent / LiAlH4 / not given 7: propan-2-ol; xylene / 0 °C / Irradiation 8: 71 percent / OsO4, tert-butyl-hydroperoxide, (Et)4NOH / acetone / 50 °C 10: Li-HMDS / tetrahydrofuran / Ambient temperature 11: 80 percent 13: mesitylenesulfonylchloride / pyridine 15: Li / various solvent(s) View Scheme