Versatile convergent synthesis of a three peptide loop containing protein mimic of whooping cough pertactin by successive Cu(I)‐catalyzed azide alkyne cycloaddition on an orthogonal alkyne functionalized TAC‐scaffold

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Abstract

Synthetic mimics of discontinuous epitopes may have a wide range of potential applications, including synthetic vaccines and inhibition of protein-protein interactions. However, synthetic access to these relatively complex peptide molecular constructs is limited. This paper describes a versatile convergent strategy for the construction of protein mimics presenting three different cyclic peptides. Using an orthogonal alkyne protection strategy, peptide loops were introduced successively onto a triazacyclophane scaffold via Cu(I)-catalyzed azide alkyne cycloaddition. This method provides rapid access to protein mimics requiring different peptide segments for their interaction and activity.

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