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A highly reducing metal-free photoredox catalyst: design and application in radical dehalogenations.

  • Author(s): Discekici, Emre H
  • Treat, Nicolas J
  • Poelma, Saemi O
  • Mattson, Kaila M
  • Hudson, Zachary M
  • Luo, Yingdong
  • Hawker, Craig J
  • Read de Alaniz, Javier
  • et al.
Abstract

Here we report the use of 10-phenylphenothiazine (PTH) as an inexpensive, highly reducing metal-free photocatalyst for the reduction of carbon-halogen bonds via the trapping of carbon-centered radical intermediates with a mild hydrogen atom donor. Dehalogenations were carried out on various substrates with excellent yields at room temperature in the presence of air.

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