Copper-catalyzed oxidations have been at the center of chemists' interest for several decades. Coupled with molecular oxygen in an aerobic media 1 or with peroxides in anaerobic systems, 2 copper-catalyzed oxidations have become cornerstones of analytical, biological, and organic chemistry. While the oxidations have been generally accepted as a valuable tool, the nature of the reaction intermediates and the reaction mechanisms have, despite great ...