1.1: DIBAL / CH2Cl2; toluene / 1 h / -78 °C 2.1: NaClO2; NaH2PO4; 2-methyl-2-butene / 2-methyl-propan-2-ol / 1 h / 0 °C 3.1: carbonyl diimidazole / tetrahydrofuran / 6 h / 20 °C 3.2: 80 percent / tetrahydrofuran / 24 h / 20 °C 4.1: NaH / tetrahydrofuran; various solvent(s) / 0.5 h / 0 °C 4.2: 91 percent / tetrahydrofuran; various solvent(s) / 8 h / 20 °C 5.1: 89 percent / DIBAL / toluene; tetrahydrofuran / 2 h / -40 °C 6.1: 80 percent / Pd(OAc)2; PPh3; Et3N / dimethylformamide / 20 h / 20 °C 7.1: 2,6-lutidine; LiCl / dimethylformamide / 0.5 h / 0 °C 7.2: 77 percent / methanesulfonyl chloride / dimethylformamide / 2 h / 0 °C 8.1: n-BuLi / hexane; tetrahydrofuran / 0.25 h / -50 °C 9.1: 3.00 g / aq. H2O2 / CHCl3 / 0.02 h View Scheme