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Keywords:

  • alkyl halides;
  • catalysis;
  • cross-coupling;
  • iron;
  • phosphine ligands
Thumbnail image of graphical abstract

Any old iron? Iron catalysts based on the widely available diphosphine ligand bis(diphenylphosphino)ethane have not previously fared particularly well in iron-catalyzed cross-coupling processes. However, this turns out not to be due to any inherently poor performance associated with the ligand, but rather the need to form a bis-chelate complex, either before or during the formation of an active FeI species.