Intramolecular Versus Intermolecular Induction of Helical Handedness in Pyridinedicarboxamide Oligomers
作者:Victor Maurizot、Christel Dolain、Ivan Huc
DOI:10.1002/ejoc.200400641
日期:2005.4
6-pyridinedicarboxylic acid. These compounds adopt stable single helical conformations in solution. NMR and circular dichroism studies show that intramolecular and intermolecular chiral induction of handedness in these helices is possible. Intramolecular induction is effected by attaching a single chiral group to the end of an oligomer. Intermolecular induction results from various noncovalent interactions between
已开发出一种新的收敛合成方案来制备 2,6-二氨基吡啶和 4-癸氧基-2,6-吡啶二甲酸的低聚酰胺。这些化合物在溶液中采用稳定的单螺旋构象。核磁共振和圆二色性研究表明,这些螺旋中的手性的分子内和分子间手性诱导是可能的。分子内诱导是通过将单个手性基团连接到低聚物的末端来实现的。分子间诱导是由手性羧酸或磺酸与寡酰胺末端残基之间的各种非共价相互作用引起的。分子内诱导似乎比分子间诱导更有效。当两种效应相互竞争时,分子内诱导占优势。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)