Synthesis of Cyclic Peptides Constrained with Biarylamine Linkers Using Buchwald−Hartwig C−N Coupling
摘要:
In this paper, we describe the synthesis of conformationally constrained cyclic peptides with biarylamine linkers for peptidomimetics using palladium-catalyzed intramolecular Buchwald-Hartwig C-N coupling. We have prepared a variety of di-, tri-, and tetrapeptides (16-22-membered) in good yields using this reaction.
Synthesis of Conformationally Constrained Cyclic Peptides Using an Intramolecular Sonogashira Coupling
摘要:
[GRAPHICS]Small peptides having a 3-bromobenzyl group at the C-termini and n-alkynoyl group at the N-termini undergo a smooth copper-free intramolecular Sonogashira coupling reaction to afford the corresponding cyclic peptides in moderate yields. Scope and limitations of this macrocyclization is demonstrated with di-, tri-, and tetrapeptides.