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Keywords:

  • arynes;
  • C[BOND]H insertion;
  • gold;
  • heterocycles;
  • homogeneous catalysis
Thumbnail image of graphical abstract

Golden aryne? Gold aryne complexes are inferred as transition states in dual gold-catalyzed cyclizations of cis-enediynes (see scheme; DCE=1,2-dichloroethane). They are better described as ortho-aurophenyl cations, which react with weak nucleophiles and undergo facile intramolecular insertions into C(sp3)[BOND]H bonds. Indanes, fused heteroarenes, and phenol derivatives are readily prepared using this method.