Ceballos, JavierGrinhagena, ElijaSangouard, GontranHeinis, ChristianWaser, Jerome2021-04-102021-04-102021-04-102021-01-1510.1002/anie.202014511https://infoscience.epfl.ch/handle/20.500.14299/177078WOS:000626275700001Easy access to a wide range of structurally diverse stapled peptides is crucial for the development of inhibitors of protein-protein interactions. Herein, we report bis-functional hypervalent iodine reagents for two-component cysteine-cysteine and cysteine-lysine stapling yielding structurally diverse thioalkyne linkers. This stapling method works with unprotected natural amino acid residues and does not require pre-functionalization or metal catalysis. The products are stable to purification and isolation. Post-stapling modification can be accessed via amidation of an activated ester, or via cycloaddition onto the formed thioalkyne group. Increased helicity and binding affinity to MDM2 was obtained for a i,i+7 stapled peptide.Chemistry, MultidisciplinaryChemistrybioconjugationhelicityhypervalent iodine reagentslate-stage functionalizationpeptide staplingtext::journal::journal article::research article