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Keywords:

  • Heck reaction;
  • homogeneous catalysis;
  • hydrogen bonding;
  • ionic liquids;
  • regioselectivity
Thumbnail image of graphical abstract

No salt please: Halide scavengers AgOTf and TlOAc are not required for the Heck coupling of electron-rich olefins with aryl bromides and chlorides. Using ammonium additives, these reactions can be carried out in either an imidazolium ionic liquid or a common molecular solvent, thus furnishing 1,1′-disubstituted olefins in high yields with excellent regioselectivities.