Conformational Studies on Peptides of α-Aminoxy Acids with Functionalized Side Chains
作者:Dan Yang、Guo-Jun Liu、Yu Hao、Wei Li、Ze-Min Dong、Dan-Wei Zhang、Nian-Yong Zhu
DOI:10.1002/asia.200900636
日期:2010.4.20
Peptides of homochiral α‐aminoxy acids of nonpolar side chains can form a 1.88‐helix. In this paper, we report the conformational studies of α‐aminoxy peptides 1, 2, 3, which have functionalized side chains, in both nonpolar and polar solvents. 1H NMR, XRD, and FTIR absorption studies confirm the presence of the eight‐membered‐ring intramolecular hydrogen bonds (the N‐O turns) in nonpolar solvents
非极性侧链的同手性α-氨基酸的肽可以形成一个1.8 8螺旋。在本文中,我们报道α氨氧基肽的构象研究1,2,3,已经官能化侧链,在这两种非极性和极性溶剂。1 H NMR,XRD和FTIR吸收研究证实了非极性溶剂以及甲醇中均存在八元环分子内氢键(N-O圈)。肽的CD研究1,2,3在不同的溶剂中,表明在甲醇和酸性水性缓冲液中保留了相当程度的螺旋含量。在α-氨氧基肽中引入功能化侧链为设计生物活性肽提供了机会。