4‐OH‐TEMPO/TCQ/TBN/HCl: A Metal‐Free Catalytic System for Aerobic Oxidation of Alcohols under Mild Conditions.

A green and economical catalyst system, 4-OH-TEMPO/TCQ/TBN/HCl, for the aerobic oxidation of a broad range of primary and secondary alcohols to the corresponding carbonyl compounds has been developed. These reactions proceed without transition-metals under mild conditions with excellent yields.