1: 89 percent / t-BuOK / dimethylsulfoxide 2: 85 percent / NaH / dimethylformamide 3: 89 percent / BBr3 / CH2Cl2 4: 99 percent / pyridine 5: 86 percent / K2CO3 / methanol 6: 74 percent / NaH / dimethylformamide 7: 100 percent / KF; HBr / dimethylformamide 8: 46 percent / K2CO3 / acetone; H2O 9: 61 percent / MeLi / tetrahydrofuran View Scheme