Highly Sterically Hindered Peptide Bond Formation between α,α-Disubstituted α-Amino Acids and <i>N</i>-Alkyl Cysteines Using α,α-Disubstituted α-Amidonitrile
作者:Xiaoling Wang、Jing Li、Yujiro Hayashi
DOI:10.1021/jacs.2c02993
日期:2022.6.15
sterically hindered peptides, research on peptides bearing an amide bond between an α,α-disubstituted α-amino acid and an N-alkyl α-amino acid remains underexplored because of the lack of an efficient synthetic approach. Herein, we describe a high-yielding synthetic method to access such extremely sterically hindered peptide bonds between amino acids. The reaction takes place between a peptide with an α,α-disubstituted
肽和蛋白质在学术界和工业界的许多领域引起了极大的关注。将不常见的氨基酸如 α,α-二取代的 α-氨基酸或N-烷基 α-氨基酸引入正常的肽骨架中是一种广泛利用且有用的工具,可用于修饰诸如构象、生物活性和药理概况。尽管对空间位阻肽很感兴趣,但对在 α,α-二取代的 α-氨基酸和N之间带有酰胺键的肽的研究由于缺乏有效的合成方法,-烷基α-氨基酸仍未得到充分探索。在这里,我们描述了一种高产合成方法来获得氨基酸之间这种极度空间位阻的肽键。该反应发生在具有 α,α-二取代的 α-酰胺腈的肽和具有N-烷基半胱氨酸的第二肽之间,无需偶联剂。