1: 79 percent / NaH / hexamethylphosphoric acid triamide; tetrahydrofuran / 1.) 0 deg C, 2.) 23 deg C 2: 85 percent / n-Bu4NF*3H2O / dimethylformamide / 23 °C 3: 53 percent / PDC / CH2Cl2 / 23 °C 4: 97 percent / BF3*Et2O / CH2Cl2 / 1.) 0 deg C, 2.) 23 deg C 5: 1.) NaH, 2.) HCl / 1.) reflux, 2.) H2O, MeOH, 23 deg C View Scheme

1: 79 percent / NaH / hexamethylphosphoric acid triamide; tetrahydrofuran / 1.) 0 deg C, 2.) 23 deg C 2: 85 percent / n-Bu4NF*3H2O / dimethylformamide / 23 °C 3: 53 percent / PDC / CH2Cl2 / 23 °C View Scheme

1: 79 percent / NaH / hexamethylphosphoric acid triamide; tetrahydrofuran / 1.) 0 deg C, 2.) 23 deg C 2: 85 percent / n-Bu4NF*3H2O / dimethylformamide / 23 °C 3: 53 percent / PDC / CH2Cl2 / 23 °C 4: 97 percent / BF3*Et2O / CH2Cl2 / 1.) 0 deg C, 2.) 23 deg C View Scheme