Journal
CHEMISTRY LETTERS
Volume 41, Issue 9, Pages 999-1001Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/cl.2012.999
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government [23750174]
- G-COE (Tokyo Institute of Technology Global COE Program) Education and Research Center for Emergence of New Molecular Chemistry
- Grants-in-Aid for Scientific Research [23750174, 22350026] Funding Source: KAKEN
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Visible light irradiation of a mixture of 1,3-dicarbonyls and 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) in the presence of photoredox catalysts, [Ru(bpy)(3)](2+) and [Ir(ppy)(2)(dtbbpy)](+) (bpy: 2,2'-bipyridine, ppy: 2-phenylpyridine, dtbbpy: 4,4'-di-tert-butyl-2,2'-bipyridine), afforded two types of oxidized products, i.e., alpha-oxyaminated products from acyclic 1,3-dicarbonyls and oxidatively dimerized products from cyclic 1,3-dicarbonyls. The Ir catalyst turned out to be more active than the Ru catalyst. This is a new photocatalytic oxidation of 1,3-dicarbonyls based on a single-electron-transfer process mediated by excited photoredox catalysts.
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