1: 58 percent / n-BuLi / diethyl ether / 1.) 0 deg , 10 min; 1 h, 2.) 0 deg C, 30 min 2: 2.) THF, 0-5 deg C, 10 min, sonication 3: 86 percent / cerium ammonium nitrate, Adogen / acetonitrile; H2O; hexane / 0.5 h View Scheme