New guanidinium-based carboxylate receptors derived from 5-amino-pyrrole-2-carboxylate: synthesis and first binding studies
作者:Carsten Schmuck、Jürgen Dudaczek
DOI:10.1016/j.tetlet.2005.08.115
日期:2005.10
The syntheses of two new guanidinium-based carboxylatereceptors 2a,b derivedfrom 5-amino pyrrole-2-carboxylate 4 are described. These receptors bind N-acetyl alanine carboxylate and O-acetyl lactate efficiently in aqueous DMSO as could be shown by NMR studies. However, compared to previously reported guanidiniocarbonyl pyrrole receptors 1, the reversal in the direction of the amide group in 2a,b