1: 99 percent / L-Selectride / tetrahydrofuran / 4 h / 0 °C 2: 99 percent / Deoxo-Fluor(R) / CH2Cl2 / 0.5 h / -20 °C 3: 94 percent / tetrabutylammonium fluoride / tetrahydrofuran / 1 h 4: pyridinium chlorochromate / dimethylformamide / 2 h 5: dimethylformamide; diethyl ether 6: 85 percent / HCl / methanol / 5 h / Heating View Scheme

1: 99 percent / L-Selectride / tetrahydrofuran / 4 h / 0 °C 2: 99 percent / Deoxo-Fluor(R) / CH2Cl2 / 0.5 h / -20 °C 3: 94 percent / tetrabutylammonium fluoride / tetrahydrofuran / 1 h 4: pyridinium chlorochromate / dimethylformamide / 2 h View Scheme