1: 80 percent / DMAP, Et3N / CH2Cl2 2: 90 percent / NaH / toluene 3: 90 percent / AlH3 / tetrahydrofuran / 0 °C 4: 60 percent / 1.) CBr4 2.) CH3CN 5: 30 percent / LiHMDS / tetrahydrofuran; hexamethylphosphoric acid triamide 6: 70 percent / (nBu)4NF / tetrahydrofuran / 0 - 25 °C 7: 70 percent / K2CO3 / methanol; H2O View Scheme