Synthesis and Conformational Studies of Peptidomimetics Containing a New Bifunctional Diketopiperazine Scaffold Acting as a β-Hairpin Inducer
作者:Ana Sofia M. Ressurreição、Andrea Bordessa、Monica Civera、Laura Belvisi、Cesare Gennari、Umberto Piarulli
DOI:10.1021/jo702072z
日期:2008.1.1
A practical synthesis of a new bifunctional diketopiperazine (DKP) scaffold 1, formally derived from the cyclization of l-aspartic acid and (S)-2,3-diaminopropionic acid, is reported. DKP-1 bears a carboxylic acid and an amino functionalities in a cis relationship, which have been used to grow peptide sequences. Tetra-, penta-, and hexapeptidomimetic sequences were prepared by solution-phase peptide
报道了一种新的双功能二酮哌嗪(DKP)支架1的实用合成,该支架正式衍生自1-天冬氨酸和(S)-2,3-二氨基丙酸的环化。DKP- 1具有顺式关系的羧酸和氨基官能团,已被用于生长肽序列。通过溶液相肽合成(Boc策略)来制备四肽,五肽和六肽模拟物序列。这些衍生物的构象分析是通过组合1H NMR光谱,IR光谱,CD光谱和计算机建模,揭示了涉及10元和18元H键环的β-发夹模拟物的形成,以及生长中的肽链的反向变化。