A branched, hydrogen-bonded heterodimer: a novel system for achieving high stability and specificity
作者:Jason B. Bialecki、Li-Hua Yuan、Bing Gong
DOI:10.1016/j.tet.2007.04.043
日期:2007.6
Presented is a description of the design, synthesis, and characterization of a novel, branched, six hydrogen-bonded heterodimer termed 'trident'. Two branched oligoamide molecules, 1 and 2, with complementary hydrogen-bonding sequences 3( AD) and 3(DA), respectively, were found to form a very stable (Ka >= 9 x 10(6) M-1) heterodimer in chloroform. Confirmation of the high stability of the heterodimer was obtained through 1D and 2D H-1 NMR spectroscopy, thin-layer chromatography (TLC), and vapor pressure osmometry (VPO). The stability of the trident occurs through the cooperative action of six programmed hydrogen-bonding interactions, which are facilitated by the pre-organization of the individual strands through intramolecular hydrogen bonding. (c) 2007 Elsevier Ltd. All rights reserved.