Molecular recognition of ω-amino acids by thiazolobenzocrown receptors: a GABA-selective ionophore
摘要:
Three new thiazolobenzocrown (TBC) ethers conjugated with picolinic acid, benzoic acid and pyridylmethyl were synthesised and their binding properties towards amino acids were assessed by 1H NMR titration and isothermal titration calorimety (ITC). The TBC-picolinic acid conjugate () showed a pronounced selectivity towards GABA by the 1H NMR titration, and the association constant for GABA had the largest value determined by ITC. The association constant of 4 for GABA was about 19 times higher than that of glycine.