Synthesis of tetrahydroisoquinoline-based pseudopeptides and their characterization as suitable reverse turn mimetics
作者:Giordano Lesma、Elisa Meschini、Teresa Recca、Alessandro Sacchetti、Alessandra Silvani
DOI:10.1016/j.tet.2007.04.024
日期:2007.6
in enantiomerically pure form and their conformational features were studied by NMR, IR, and molecular modeling techniques. The presence of a reverse turn conformation was observed in all the structures, suggesting the key role of the scaffold as reverse turn inducer. In particular, all the analyses led to the conclusion that a β-turn conformation is mostly stabilized in tetrapeptide mimetic 4b and
以对映体纯的形式合成了含有Tic部分的新拟肽,并通过NMR,IR和分子建模技术研究了它们的构象特征。在所有结构中均观察到反向构象的存在,表明支架作为反向诱导子的关键作用。特别地,所有分析得出的结论是,β-转角构象在四肽模拟物4b和六肽模拟物5a,b中大部分稳定。在5a和b的情况下,C1立体化学在确定稳定构象中起着核心作用,仅在分子结构中支持带有14元分子内氢键环的β-发夹结构的形成。5b。