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Keywords:

  • alcohols;
  • amines;
  • pincer ligands;
  • ruthenium;
  • water
Thumbnail image of graphical abstract

Just add water! The title reaction is catalyzed by an acridine-based pincer complex (1, see scheme). This one-step transformation uses water as the only reagent in the absence of additional bases, oxidants, or reductants. Cyclization of 1,4-diaminobutane and 1,6-diaminohexane catalyzed by 1 leads to the formation of pyrrolidine and azepane, respectively.