Synthesis and conformational preferences of unnatural tetrapeptides containing l-valine units
作者:Daniele Balducci、Andrea Bottoni、Matteo Calvaresi、Gianni Porzi、Sergio Sandri
DOI:10.1016/j.tetasy.2006.12.006
日期:2006.12
The stereoselective synthesis of non-proteinogenic tetrapeptides 7, 16 and 17 containing two l-valine units and two modified α-amino acids (proline and aspartic acid) has been accomplished starting from the l-valine derived chiral synthon 1. Investigations of the conformational preference and structure of these unnatural peptides were carried out using 1H NMR and IR spectroscopic techniques and a conformational
非蛋白原的四肽的立体选择性合成7,16和17含有两个L-缬氨酸单元和两个改性α氨基酸(脯氨酸和天冬氨酸)已经完成从L-缬氨酸开始衍生的手性合成子1。使用1 H NMR和IR光谱技术以及基于淬灭分子动力学(QMD)的构象分析,对这些非天然肽的构象偏好和结构进行了研究。