1: MeOH - p-TsOH / 3 h / Ambient temperature 2: 1.) pyridinium dichromate / 1.) DMF, 40 deg C, 48 h 3: 64 percent / 60percent AcOH / 24 h / 60 °C 4: t-AmONa / benzene / 0.5 h / Ambient temperature 5: Et3N / tetrahydrofuran; H2O / 1 h / Ambient temperature 6: 3 percent / O3 / CH2Cl2 / -78 °C 7: 60 percent / n-BuLi / tetrahydrofuran / -78 deg C, 2 min -> 0 deg C, 1 h 8: Jones reagent 9: KOH / 24 h / Ambient temperature View Scheme