1: 75 percent / pyridinium chlorochromate; Al2O3 / CH2Cl2 / 0.5 h / 20 °C 2: 5 percent / NaOEt / ethanol; tetrahydrofuran / 5 h / 0 °C 3: 67 percent / NaH; LiBH4 / dioxane; tetrahydrofuran; various solvent(s) / 28 h / Heating View Scheme