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Keywords:

  • asymmetric synthesis;
  • cycloaddition;
  • Diels–Alder reaction;
  • hydrogen bonds;
  • organocatalysis
Thumbnail image of graphical abstract

Diels or no Diels? A bifunctional organic catalyst based on the thiourea motif is able to coordinate both diene and dienophile in an unprecedented asymmetric Diels–Alder reaction of 3-vinylindole derivatives, giving a rapid access to optically active tetra- and hexahydrocarbazoles with excellent results in terms of yields, diastereoselectivities, and enantioselectivities.