Ruthenium(II) polypyridyl complexes promote the efficient radical cation Diels�Alder cycloaddition of electron-rich dienophiles upon irradiation with visible light. These reactions enable facile [4+2] cycloadditions that would be electronically mismatched under thermal conditions. Key to the success of this methodology is the availability of ligand-modified ruthenium complexes that enable the rational tuning of electrochemical properties of the catalyst without significantly perturbing the overall photophysical properties of the system.

Radical cation Diels–Alder cycloadditions by visible light photocatalysis

245th National Meeting (2013)

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