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Keywords:

  • macrocycles;
  • multicomponent reactions;
  • natural products;
  • peptides;
  • total synthesis
Thumbnail image of graphical abstract

Mastering unusual amino acids: The first total synthesis of the potent protease inhibitor cyclotheonamide C (see structure representation) has been achieved. The key features of the synthesis are a three-component tandem procedure to create a masked α-keto-β-arginine within a peptide chain, and the control of the extended conjugation of a vinylogous α,β-dehydrotyrosine.