1: NaBH4 / ethanol / 1.5 h / Ambient temperature 2: 1.) NaOCH3, 2.) conc. sulfuric acid / methanol, 2.) -35 deg C, 3h View Scheme

1: potassium fluoride / propan-2-ol / 6 h / Ambient temperature 2: 4-dimethylaminopyridine / diethyl ether / 14 h / Ambient temperature View Scheme

4-(N,N-dimethlyamino)pyridine in diethyl ether 14 h; Ambient temperature;

1: 100 percent / conc. sulfuric acid, / methanol / 0.17 h / Heating 2: 66 percent / pyridinium chlorochromate / CH2Cl2 / 1 h / Ambient temperature 3: potassium fluoride / propan-2-ol / 6 h / Ambient temperature 4: 4-dimethylaminopyridine / diethyl ether / 14 h / Ambient temperature View Scheme

1: 66 percent / pyridinium chlorochromate / CH2Cl2 / 1 h / Ambient temperature 2: potassium fluoride / propan-2-ol / 6 h / Ambient temperature 3: 4-dimethylaminopyridine / diethyl ether / 14 h / Ambient temperature View Scheme

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