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Keywords:

  • catenanes;
  • macrocyclizations;
  • molecular necklaces;
  • molecular recognition;
  • template synthesis
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Rings and necklaces: Three [3]catenanes and a five-membered molecular necklace ([5]MN), with up to 60- and 92-membered rings as their centerpieces, respectively, have been synthesized. The synthesis started from the corresponding complexes in which the threaded flexible linear guests were bent at approximately right angles to facilitate kinetically controlled macrocyclizations.