作者:Richard J. Fitzmaurice、Francesca Gaggini、Natarajan Srinivasan、Jeremy D. Kilburn
DOI:10.1039/b700988g
日期:——
A series of thiourea and guanidinium derivatives have been prepared and their ability to bind a carboxylate group has been investigated. Guanidinium 33, featuring two additional amides and a pyridine moiety, proved to be the most potent carboxylate binding site and was able to bind acetate in aqueous solvent systems (Kass = 480 M−1 in 30% H2O–DMSO). The pyridine moiety is critical to obtaining strong binding, and comparison with the binding properties of analogous compounds in which the pyridine is replaced by a benzene ring provides a striking example of enthalpy–entropy compensation.
我们制备了一系列硫脲和胍衍生物,并研究了它们与羧基结合的能力。胍33具有两个额外的酰胺和一个吡啶基,被证明是最有效的羧基结合位点,能够在水性溶剂体系中结合醋酸盐(30% H2O-DMSO 中的 Kass = 480 M-1)。吡啶分子是获得强结合力的关键,将其与吡啶被苯环取代的类似化合物的结合特性进行比较,是焓熵补偿的一个显著实例。