Diversity-oriented peptide stapling: a third generation copper-catalysed azide–alkyne cycloaddition stapling and functionalisation strategy

Thu Phuong Tran, Christian Ørnbøl Larsen, Tobias Røndbjerg, Martina de Foresta, Micha Ben Achim Kunze, Ales Marek, Jacob Hartvig Løper, Lotte-Emilie Boyhus, Astrid Knuhtsen, Kresten Lindorff-Larsen, Daniel Sejer Pedersen

17 Citations (Scopus)

Abstract

The introduction of macrocyclic constraints in peptides (peptide stapling) is an important tool within peptide medicinal chemistry for stabilising and pre-organising peptides in a desired conformation. In recent years, the copper-catalysed azide–alkyne cycloaddition (CuAAC) has emerged as a powerful method for peptide stapling. However, to date CuAAC stapling has not provided a simple method for obtaining peptides that are easily diversified further. In the present study, we report a new diversity-oriented peptide stapling (DOPS) methodology based on CuAAC chemistry. Stapling of peptides incorporating two azide-modified amino acids with 1,3,5-triethynylbenzene efficiently provides (i, i+7)- and (i, i+9)-stapled peptides with a single free alkyne positioned on the staple, which can be further conjugated or dimerised. A unique feature of the present method is that it provides easy access to radiolabelled stapled peptides by catalytic tritiation of the alkyne positioned on the staple.

Original languageEnglish
JournalChemistry: A European Journal
Volume23
Issue number14
Pages (from-to)3490-3495
Number of pages6
ISSN0947-6539
DOIs
Publication statusPublished - 8 Mar 2017

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