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Keywords:

  • amides;
  • anionic ligands;
  • chemoswitchability;
  • olefin metathesis;
  • ruthenium
Thumbnail image of graphical abstract

Unprecedented amido derivatives of the first-, second-, and third-generation Grubbs ruthenium catalysts were prepared, characterized, and tested in ring-closing metathesis (RCM) of model dienes. In the ruthenium–amide (formally: 2-ruthenaindole) form, these complexes exhibit nearly no activity in RCM. However, a dramatic increase of activity was observed upon in situ activation with an ethereal solution of HCl (see figure).