1: 71 percent / dimethylsulfoxide 2: 60 percent / H2 / PtO2 / CH2Cl2 3: 95 percent / PCC / CH2Cl2 4: 82 percent / dimethylsulfoxide 5: 72 percent / cerium ammonium nitrate / acetonitrile; H2O 6: 33 percent / Pd(Ph3P)4, aq. NaHCO3 / tetrahydrofuran View Scheme