Self-Complementary Quadruply Hydrogen-Bonded Duplexes Based on Imide and Urea Units
作者:Xianghui Li、Yuyu Fang、Pengchi Deng、Jinchuan Hu、Tian Li、Wen Feng、Lihua Yuan
DOI:10.1021/ol2018455
日期:2011.9.2
The quadruply hydrogen-bonded duplexes based on an imide-urea structure preorganized by three-center hydrogen bonds were found to associate via bifurcated hydrogen bonds. (1)H NMR dilution experiments revealed the high stability of the homodimer in apolar solvent (K(dim) > 10(5) M(-1) in CDCl(3)) and enhancement of association ability due to electron-withdrawing substituent effects. The ready synthetic availability and adjustable association affinity via electronic effects may render these association units potentially applicable in constructing supramolecular architectures.