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Keywords:

  • alkyne;
  • heterocycle;
  • homogeneous catalysis;
  • isocyanate;
  • magnesium
Thumbnail image of graphical abstract

Bicycle race: Structurally complex bis(imidazolidine-2,4-dione) molecules may be synthesized with complete atom-efficiency from simple building blocks by a kinetically controlled magnesium-mediated cascade of intermolecular isocyanate insertion and intramolecular alkyne hydroamination reaction steps.