New Family of Peptidomimetics Based on the Imidazole Motif
摘要:
Starting from amino acid esters, new peptidomimetics based on the imidazole scaffold were prepared. An efficient and rapid sequence consisting of two subsequent one-pot procedures was developed and applied to various aminoacids. As they provide more substitution patterns, these heterocyclic mimics are promising tools for structural and biological studies.
We have found that a boronicacid catalyzed amidation of an N -hydroxy amino acid methyl ester with amino acid tert -butyl esters gave N -hydroxy dipeptide derivatives in good yields without any racemization. The protecting groups on the nitrogen atom could be easily removed by heterogeneous hydrogenation conditions.
A Lewis-acid-catalyzed method for the substrate-directed formation of peptide bonds has been developed, and this powerful approach is utilized for the new "remote" activation of carboxyl groups under solvent-free conditions. The presented method has the following advantages: 1) the high-yielding peptidesynthesis uses a tantalum catalyst for any amino acids; 2) the reaction proceeds without any racemization;
New Family of Peptidomimetics Based on the Imidazole Motif
作者:Sylvain Petit、Corinne Fruit、Laurent Bischoff
DOI:10.1021/ol102118u
日期:2010.11.5
Starting from amino acid esters, new peptidomimetics based on the imidazole scaffold were prepared. An efficient and rapid sequence consisting of two subsequent one-pot procedures was developed and applied to various aminoacids. As they provide more substitution patterns, these heterocyclic mimics are promising tools for structural and biological studies.