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Keywords:

  • carboxylic acids;
  • hybrid catalysts;
  • hypervalent iodine;
  • oxidation;
  • primary alcohols;
  • 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO)

Abstract

Novel bifunctional hybrid-type catalysts bearing 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and iodobenzene moieties (1a and 1b) were developed and used for the environmentally benign oxidation of primary alcohols to carboxylic acids. Reaction of primary alcohols 2 with a catalytic amount of 1 in the presence of peracetic acid as a co-oxidant under mild conditions gave the corresponding carboxylic acids 3 in excellent yields.