Oxidation plays a key role in synthesizing highly functionalized molecules . Jones oxidation and oxidation using KMnO4 are classically powerful methods, but the harsh and hazardous conditions are obstacles to applying these methods to complex molecules. Thus, a variety of mild and chemoselective oxidations have been developed: Swern oxidation , tetrapropylammonium perruthenate (TPAP) oxidation , Pinnick oxidation , and 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) oxidation . In particular, TEMPO oxidation has been applied on a manufacturing scale as a low-cost, eco-friendly and environmentally friendly oxidation . Although these oxidation processes have many advantages, they generally require stoichiometric oxidants, and reduced byproducts must be purged in a purification step, which decreases the atom economy .