Carboxylate Binding by Indole-Based Guanidinium Receptors: Acylguanidinium Cations are Better than Aromatic Guanidinium Cations
作者:Carolin Rether、Carsten Schmuck
DOI:10.1002/ejoc.201001465
日期:2011.3
three new indole-basedguanidiniumcations 3, 4, and 16, that feature two different types of anion binding sites, either an acylguanidium cation (3) or an aromaticguanidiniumcation (4) or both (16), is presented. NMR binding studies with N-acetylalaninecarboxylate as substrate in dimethylsulfoxide (DMSO) show that the acylated guanidiniumcation is a significantly better anion binding site than the aromatic