Synthesis and Evaluation of the β-Turn Properties of 4-Amino-1,2,4,5-tetrahydro-2-benzazepin-3-ones and of Their Spirocyclic Derivative
作者:Karolien Van Rompaey、Steven Ballet、Csaba Tömböly、Rien De Wachter、Kenno Vanommeslaeghe、Monique Biesemans、Rudolph Willem、Dirk Tourwé
DOI:10.1002/ejoc.200500996
日期:2006.7
A series of 4-amino-tetrahydro-2-benzazepin-3-one derivatives (Ac–Aba–Xxx–NHMe) were prepared as tetrapeptide mimetics. Considering the structural resemblance with the so-called Freidinger lactams, their propensity to adopt a β-turn conformation was investigated by NMR spectroscopy (solvent and temperature dependence) and molecular modeling. Interestingly, most of these lactams adopt extended conformations
制备了一系列 4-氨基-四氢-2-苯并氮杂-3-one 衍生物(Ac-Aba-Xxx-NHMe)作为四肽模拟物。考虑到与所谓的 Freidinger 内酰胺的结构相似性,通过 NMR 光谱(溶剂和温度依赖性)和分子建模研究了它们采用 β-转角构象的倾向。有趣的是,这些内酰胺中的大多数都采用扩展构象,只有螺-苯并氮杂酮 9 强烈偏好形成 β-转角。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)