Stabilized Carbon Radical-Mediated Assembly of Arylthianthrenium Salts, Alkenes and Amino Acid/Peptide Derivatives.

Efficiently assembling amino acids and peptides with bioactive molecules facilitates the modular and streamlined synthesis of a diverse library of peptide-related compounds. Particularly notable is their application in pharmaceutical development, leveraging site-selective late-stage functionalization. Here, a visible light-induced three-component reaction involving arylthianthrenium salts, amino acid/peptide derivatives, and alkenes are introduced. This approach utilizes captodatively-stabilized carbon radicals to enable radical-radical C─C coupling, effectively constructing complex bioactive molecules. This method offers a promising alternative route for modular synthesis of peptide-derived bio-relevant compounds.