Abstract

The pteridin-2,4,7-trione 6,8′-endoperoxides are synthesized and their thermal reactions are examined. The pteridin-2,4,7-triones ( 1) reacted smoothly with singlet oxygen to yield the pteridin-2,4,7-trione 6,8′-endoperoxides ( 2–5). On warming the endoperoxide ( 2a) reverted to the starting pteridin-2,4,7-trione ( 1a) with liberation of singlet oxygen, which was confirmed by trapping experiment using typical singlet oxygen acceptors ( 7–12).

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