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Synthesis 1997; 1997(6): 614-616
DOI: 10.1055/s-1997-1389
short paper
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Synthesis of 2-Oxy-3-(pyridinium-1'-yl)-1,4-naphthoquinone Derivatives by Iodine or Hydrogen Peroxide Oxidation of 1,4-Naphthoquinones in the Presence of Substituted Pyridines

Attilio Citterio* , Mariacristina Fochi, Antonietta Maronati, Roberto Sebastiano, Andrea Mele
  • *Dipartimento di Chimica, Politecnico di Milano, Via Mancinelli 7, I-20131 Milano, Italy, Fax +39(2)23993080
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Publication Date:
31 December 2000 (online)

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2-Oxy-3-(pyridinium-1'-yl)-1,4-naphthoquinone betaines are obtained in moderate to good yield by oxidation of 1,4-naphthoquinones with iodine/MnO2 or hydrogen peroxide in the presence of substituted pyridines. Pyridinium-1,4-naphthoquinone iodides and 2,3-epoxy-2,3-dihydronaphthoquinone are suggested intermediates.

1,4 naphthoquinone betain - pyridinium salt - oxidation - hydrogen peroxide

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