4.2 Article

2-Aryl-1,3-dimethylbenzimidazolines as Effective Electron and Hydrogen Donors in Photoinduced Electron-Transfer Reactions

Journal

AUSTRALIAN JOURNAL OF CHEMISTRY
Volume 68, Issue 11, Pages 1640-1647

Publisher

CSIRO PUBLISHING
DOI: 10.1071/CH15314

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Funding

  1. Ministry of Education, Culture, Sports, Science, and Technology, Japan
  2. Uchida Energy Science Promotion Foundation
  3. Sasaki Environment Technology Foundation

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2-Aryl-1,3-dimethylbenzimidazolines (DMBIHs) have been applied to photoinduced electron-transfer reductions of various organic substrates. Either direct or indirect electron transfer between the substrates and DMBIHs is utilized to promote the desired transformations. Photoexcitation of the substrates using light above 280 nm was carried out in the former protocol whereas a photosensitization method using materials such as substituted pyrenes, ruthenium and iridium complexes that absorb longer-wavelength light was employed in the latter. In these reactions, DMBIHs undergo initial electron transfer and subsequent proton or hydrogen atom transfer.

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