Stereoselective fluorination is investigated as a method for modulating the properties of a cyclic RGD-containing tetrapeptide. Three key outcomes of fluorination are assessed: (i) the effect on peptide cyclisation efficiency; (ii) the ability to fine-tune the molecular conformation; and (iii) the effect on the cyclicpeptides’ biological activity. Fluorination is found to exert pronounced effects against all
Solid phase synthesis of peptides containing backbone-fluorinated amino acids
作者:Luke Hunter、Sharon Butler、Steven B. Ludbrook
DOI:10.1039/c2ob26596f
日期:——
Backbone-fluorinated amino acids exhibit unique conformational behaviour, and have potential utility as components of bioactive shape-controlled peptides. However, methods for the elaboration of backbone-fluorinated amino acids have thus far been limited to solution phase peptide coupling reactions. In this paper, protocols are developed that allow the successful manipulation of backbone-fluorinated amino acids using Fmoc-strategy solid phase peptide synthesis. To exemplify this strategy, several fluorinated RGD peptide analogues were synthesised in moderate to good overall yields.
from this conformation in a controlled way. Herein, we explore stereoselective fluorination as a method for controlling the conformations of α/γ-hybrid peptides. We show through a combination of X-ray, NMR and CD analyses that fluorination can either stabilize or disrupt the 12-helix, depending on the fluorinestereochemistry. These findings could inform the ongoing development of diverse functional hybrid
由 α- 和 γ- 氨基酸交替模式组成的肽作为抗代谢生物活性剂具有潜在的价值。为了获得最佳功能,通常需要某种构象限制来稳定主要的 12 螺旋,或者以受控方式将肽从该构象转移。在此,我们探索立体选择性氟化作为控制 α/γ-杂合肽构象的方法。我们通过结合 X 射线、NMR 和 CD 分析表明,氟化可以稳定或破坏 12 螺旋,具体取决于氟的立体化学。这些发现可以为多种功能杂合肽的持续开发提供信息。