Hydroperoxidation Using Manganese(III) Acetate

Since the nitrogen-heterocycle-fused dioxabicyclic compounds were obtained by the reaction of 2,3-pyrrolidinediones, 2,4-pyrrolidinediones, 4-piperidine-

3-carboxylates, and 2,4-piperidinediones, the manganese(III)-catalyzed endoperoxidation was applied to other pharmaceutically important cyclic amide derivatives, such as the barbituric acids, pyrazolidine-3,5-diones, and

4-hydroxy-1ff-quinolin-2-ones. However, the corresponding azadioxabicyclic compounds were not formed, but the hyroperoxidation unexpectedly occurred.

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