Exploring the Conformation of Mixed <i>Cis</i>–<i>Trans</i> α,β-Oligopeptoids: A Joint Experimental and Computational Study
作者:Geoffrey Dumonteil、Nicholus Bhattacharjee、Gaetano Angelici、Olivier Roy、Sophie Faure、Laurent Jouffret、Franck Jolibois、Lionel Perrin、Claude Taillefumier
DOI:10.1021/acs.joc.8b00606
日期:2018.6.15
The synthesis and conformational preferences of a set of new synthetic foldamers that combine both the α,β-peptoid backbone and side chains that alternately promote cis- and trans-amide bond geometries have been achieved and addressed jointly by experiment and molecular modeling. Four sequence patterns were thus designed and referred to as cis-β-trans-α, cis-α-trans-β, trans-β-cis-α, and trans-α-cis-β
通过实验和分子建模,已经达到并解决了一组新的合成折叠剂的合成和构象偏好,所述折叠剂结合了α,β-类肽主链和交替促进顺式和反式-酰胺键几何结构的侧链。四个序列模式被这样设计并且被称为顺式-β-反式-α,顺式-α-反式-β,反式-β-顺-α,和反式-α-顺-β。α-和β Nt个卜单体用于强制顺-酰胺键的几何形状和α-和β ÑPh单体促进反酰胺。NOESY和分子模拟揭示出反式-α-顺-β和顺-β-反式-α四聚体的分子内显示弱相互作用的一个类似的模式。这同样适用于与顺-α-反式-β和反式-β-顺-α四聚体,但相互作用在性质上比在确定不同的反式-α-顺-β为基础的低聚物。有趣的是,反式-α-顺式-β拟肽结构允许建立大量稳定结构的分子内相互作用。