Highly Fructose Selective Transport Promoted by Boronic Acids Based on a Pentaerythritol Core
作者:Scott P. Draffin、Peter J. Duggan、Sandhya A. M. Duggan
DOI:10.1021/ol015560x
日期:2001.3.1
We have designed and synthesized a highly lipophilic boronicacid (11) with a molecular shape that makes it much more effective at carrying sugars through organic membranes than a previously used steroidal boronicacid. The corresponding diboronic acid (12) was also found to transport fructose ahead of glucose with a very high selectivity (7.6:1.0). Modeling suggests that 12 is able to carry two fructose
Highly selective lipophilic diboronic acid that transports fructose as the trisdentate 2,3,6-β-d-fructofuranose ester
作者:Scott P. Draffin、Peter J. Duggan、Sandhya A.M. Duggan、Jens Chr. Norrild
DOI:10.1016/j.tet.2003.09.068
日期:2003.11
The transport of fructose and glucose through supported liquid membranes promoted by a tetrahedral shaped lipophilic monoboronic acid and diboronic acid, both based on a pentaerythritol core, has been studied. The diboronic acid gave a high fructose/glucose selectivity (7.7: 1.0). The results of molecular modelling studies and C-13 NMR experiments with uniformly labelled C-13-D-fructose suggest that the enhanced selectivity results from the formation of a trisdentate 2,3,6-beta-D-fructofuranose diester within the membrane. Experimental evidence for a previously proposed macrocyclic D-fructopyranose diester formed with an o-phenylene linked diboronic acid has also been found. (C) 2003 Elsevier Ltd. All rights reserved.