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.
                                    在取代的
吡啶存在下,用
碘/
MnO2 或
过氧化氢氧化 
1,4-萘醌,可获得 2-氧基-3-(
吡啶-1'-基)-
1,4-萘醌甜菜碱,收率中等至良好。建议将
吡啶-
1,4-萘醌碘化物和 2,3-环氧-2,3-二氢
萘醌作为中间体。