1: 92 percent / imidazole; 4-DMAP / CH2Cl2 2: 62 percent / bromotrimethylsilane / CH2Cl2 3: 95 percent / CH2Cl2 4: 93 percent / chromous chloride / tetrahydrofuran / 20 °C 5: 99 percent / n-Bu4NF / dimethylformamide 6: 99 percent / CH2Cl2 7: 92 percent / Zn / benzene / Heating 8: 83 percent / Dess-Martin periodinane / CH2Cl2 9: 96 percent / toluene / Heating 10: 99 percent / HF / acetonitrile 11: NaH / CH2Cl2 View Scheme