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Manganese(III)-Catalyzed Facile Direct Hydroperoxidation of Some Heterocyclic 1,3-Dicarbonyl Compounds

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journal contribution
posted on 11.07.2003, 00:00 by Md. Taifur Rahman, Hiroshi Nishino
The aerobic oxidation of 4-monosubstituted 1,2-diphenylpyrazolidine-3,5-diones 1 was carried out in the presence of a catalytic amount of manganese(III) acetate to quantitatively give the corresponding 4-hydroperoxypyrazolidinediones 2. A similar autoxidation of the 5-monosubstituted barbituric acids 5 and 3-butyl-4-hydroxy-2-quinolinone 7 also gave the corresponding hydroperoxides 5 and 8, respectively, in moderate to excellent yields.