1: 1.) Mg / 1.) THF, reflux, 2.5 h, 2.) THF, reflux 3 h 2: 82 percent / pyridinium chlorochromate / CH2Cl2 / 36 h / 25 °C 3: 90 percent / tetrahydrofuran / 1.) -78 deg. C, 1 h, 2.) -78 - 0 deg.C, 1 h 4: 100 percent / phosphoryl chloride / CH2Cl2 / 1 h / 25 °C 5: 91 percent / H2 / 10percent Pd/C / ethyl acetate / 48 h / 3102.9 Torr 6: 68 percent / DDQ / CH2Cl2 / 1 h View Scheme