4.5 Article

Aerobic C-C Bond Cleavage of Indoles by Visible-Light Photoredox Catalysis with Ru(bpy)32+

Journal

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2017, Issue 45, Pages 6652-6659

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201701245

Keywords

Photoredox catalysis; Photochemistry; Ruthenium; Cleavage reactions; Oxygenation; Radicals

Funding

  1. National Natural Science Foundation of China [21602187, 21502161]
  2. Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization
  3. Scientific Research Fund of Hunan Provincial Education Department [16B251]
  4. China Postdoctoral Science Foundation [2015M580691]
  5. Hunan Provincial Natural Science Foundation of China [2017JJ3299]

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Photoredox catalysis with Ru(bpy)(3)(2+) (2,2-bipyridine) has been used to enable the activation of oxygen in the aerobic C-C cleavage/oxygenation reaction of indoles. A number of indole substrates that contain various functional groups were successfully employed in the reaction to give a wide range of ortho-aminobenzaldehyde derivatives. These products can then be used as versatile building blocks for further synthetic modifications. Mechanistic studies suggest that the reaction proceeds through a radical pathway.

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