4.5 Article

Visible-Light-Photocatalyzed Metal-Free C-H Heteroarylation of Heteroarenes at Room Temperature: A Sustainable Synthesis of Biheteroaryls

Journal

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2015, Issue 8, Pages 1727-1734

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201500006

Keywords

Synthetic methods; Photochemistry; C-H heteroarylation; Cross-coupling; Heterocycles; Radical reactions

Funding

  1. Department of Science and Technology (DST), New Delhi [SR/S2/JCB-11/2008]
  2. Indian National Science Academy, New Delhi
  3. Council of Scientific and Industrial Research (CSIR), New Delhi

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An efficient C-H heteroarylation of heteroarenes is achieved through visible-light photoredox-catalyzed diazotization of heteroarylamines in situ by tBuONO at room temperature. A library of functionalized biheteroaryls is obtained by using this protocol. The reaction avoids the use of transition-metal catalysts, additives, and acidic reaction medium.

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