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Keywords:

  • aerobic oxidation;
  • alcohols;
  • bromide-bromate coupling;
  • 2,2,6,6-tetramethylpiperidine N-oxyl radical (TEMPO)

Abstract

An effective transition-metal-free catalytic system is developed for aerobic oxidations of alcohols. Using catalytic amount of bromide-bromate coupling, H2SO4, and NaNO2, together with 2,2,6,6-tetramethylpiperidine N-oxyl radical (TEMPO) in the presence of air, various alcohols could be converted into the corresponding aldehydes or ketones in good to excellent isolated yields under mild conditions.