The photosensitised oxygenation of 3-methylpyrrole involving a dioxetan intermediate

Abstract
The dye-sensitised photo-oxygenation of 3-methylpyrrole in methanol gives 3-methyl-3-methoxy-Δ4-pyrrolin-2-one and 3-hydroxy-3-methyl-Δ4-pyrrolin-2-one (which we assume arise via a dioxetan intermediate) as well as 3-methyl-5-methoxy-Δ3-pyrrolin-2-one, 4-methyl-5-methoxy-Δ3-pyrrolin-2-one, 5-hydroxy-3-methyl-Δ3-pyrrolin-2-one, and citraconimide.

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