Formation of 6-Formyl-7-hydroxy-8-methoxycoumarin and 5,8-Dioxopsoralen by Reaction of 8-Methoxypsoralen with H2O2 and Potassium Superoxide (KO2) Catalyzed by Halogenated or Perhalogenated 5,10,15,20-Tetraarylporphyrinatoiron(III) Chlorides.
作者:Shive M.S. CHAUHAN、Bishwabhusan SAHOO、Prabhu P. MOHAPATRA、Bhanu KALRA、Anju GULATI
DOI:10.1248/cpb.49.1232
日期:——
The oxidation of 8-methoxypsoralen (2) with hydrogen peroxide and potassium superoxide catalyzed by 5,10,15,20-(2,4,6-trimethylphenyl)porphyrinatoiron(III) chlorides [Me12TPPFe(III)Cl] (1a) and 5,10,15,20-(2,6-dichlorophenyl)porphyrinatoiron(III) chlorides [Cl8TPPFe(III)Cl] (1b) in dichloromethane gives 6-formyl-7-hydroxy-8-methoxycoumarin (3) in moderate yields, whereas the oxidation of (2) with H2O2
5,10,15,20-(2,4,6-三甲基苯基)卟啉铁(III)氯化物[Me12TPPFe(III)Cl](1a)和过氧化氢催化氧化8-甲氧基补骨脂素(2)和过氧化钾二氯甲烷中的5,10,15,20-(2,6-二氯苯基)卟啉铁(III)氯化物[Cl8TPPFe(III)Cl](1b)以中等收率得到6-甲酰基-7-羟基-8-甲氧基香豆素(3) ,而5,2,5,10,15,20-(2,6-二氯苯基)-β-八氢杂卟啉铁(III)氯化物[Cl8betaX8TPPFe(III)Cl](X = Cl,Br)催化(2)用H2O2氧化1c,1d)以中等产量产生了5,8-二氧杂补骨脂素(4)。