1: With oxalyl dichloride; dimethyl sulfoxide in dichloromethane Swern oxidation; P=760.051 Torr; 5 h; CoolingInert atmosphere; 2: With triethylamine in dichloromethane Swern oxidation; P=760.051 Torr; Inert atmosphereCooling;

1: 50 percent / cerium(IV) ammonium nitrate / H2O; acetonitrile / 0.5 h / Ambient temperature 2: 22 percent / tetramethylammonium hydroxide / various solvent(s) / 16 h / Heating View Scheme