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
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
作者:Attilio Citterio、Mariacristina Fochi、Antonietta Maronati、Roberto Sebastiano、Andrea Mele
DOI:10.1055/s-1997-1389
日期:1997.6
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.