Efficient Synthesis of Structurally Diverse Diazabicycloalkanes: Scaffolds for Modular Dipeptide Mimetics with Tunable Backbone Conformations
作者:Wolfgang Maison、Daniel C. Grohs、Alexander H. G. P. Prenzel
DOI:10.1002/ejoc.200300700
日期:2004.4
be easily converted into a number of dipeptide mimetics with defined and variable stereochemistry and a number of different amino acid side chains. The backbone dihedral angles within these dipeptide mimetics can be tuned by varying the stereochemistry and the ring sizes of the diazabicycloalkane scaffold. The syntheses of conformationally constrained dipeptide analogues in four to five steps are presented
报道了基于二氮杂双环烷烃支架的新型二肽模拟物的立体选择性合成。该路线从双(羟基化)并在 N 端与第二个氨基酸偶联的对映异构纯氮杂双环烯烃 1 开始。反应序列的关键步骤是氧化裂解所得二肽 5 以得到高度官能化的二氮杂双环烷烃 6,它可以很容易地转化为许多具有确定和可变立体化学和许多不同氨基酸侧链的二肽模拟物。这些二肽模拟物中的骨架二面角可以通过改变二氮杂双环烷烃支架的立体化学和环大小来调整。介绍了四到五个步骤中构象受限二肽类似物的合成。随着二肽模拟物 19a-c 的合成,引入了用于将二氮杂双环烷烃与其他功能性分子(如标记物或固相)缀合的合适的接头部分,使这些化合物成为模块化二肽模拟物,可能会在组合化学中用作模块化配体或固相附着支架。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)