lithium in various solvent(s) Yield given;

Multi-step reaction with 2 steps 1: mesitylenesulfonylchloride / pyridine  

Multi-step reaction with 9 steps 2: propan-2-ol; xylene / 0 °C / Irradiation3: 71 percent / OsO4, tert-butyl-hydroperoxide, (Et)4NOH / acetone / 50 °C5: Li-HMDS / tetrahydrofuran / Ambient temperature6: 80 percent8: mesitylenesulfonylchloride / pyridine  

Multi-step reaction with 10 steps 1: 83 percent / LiAlH4 / not given3: propan-2-ol; xylene / 0 °C / Irradiation4: 71 percent / OsO4, tert-butyl-hydroperoxide, (Et)4NOH / acetone / 50 °C6: Li-HMDS / tetrahydrofuran / Ambient temperature7: 80 percent9: mesitylenesulfonylchloride / pyridine  

Multi-step reaction with 12 steps 1: CH2Cl2 / -78 °C2: 49 percent / O3, / ethyl acetate; pyridine / -78 °C3: 83 percent / LiAlH4 / not given5: propan-2-ol; xylene / 0 °C / Irradiation6: 71 percent / OsO4, tert-butyl-hydroperoxide, (Et)4NOH / acetone / 50 °C8: Li-HMDS / tetrahydrofuran / Ambient temperature9: 80 percent11: mesitylenesulfonylchloride / pyridine  

Multi-step reaction with 3 steps 2: mesitylenesulfonylchloride / pyridine  

Multi-step reaction with 4 steps 1: 80 percent3: mesitylenesulfonylchloride / pyridine