tetrabutyl ammonium fluoride in tetrahydrofuran Ambient temperature;

1: 75 percent / pyridine; CH2Cl2 / Ambient temperature 2: 100 percent / dimethylsulfoxide / 80 - 85 °C 3: 76 percent / K2CO3 / methanol / Ambient temperature 4: 100 percent / imidazole / dimethylformamide / Ambient temperature 5: DIBAH / CH2Cl2 / -78 °C 6: NaBH4 / methanol / Ambient temperature 7: 90 percent / n-Bu4NF / tetrahydrofuran / Ambient temperature View Scheme