Synthesis of new chiral imidazolium salts derived from amino acids: their evaluation in chiral molecular recognition
作者:Belén Altava、Dalgi S. Barbosa、M. Isabel Burguete、Jorge Escorihuela、Santiago V. Luis
DOI:10.1016/j.tetasy.2009.03.028
日期:2009.5
A family of new imidazolium salts derived from natural amino acids has been synthesized and tested for NMR enantiodiscrimination, as chiral shift reagents, of carboxylic acids. These imidazolium receptors contain different structural modifications and the splitting of the signals of the acids, after addition of the corresponding CSRs, depends on these structural variables. Compound 8b exhibited the
合成了一系列新的衍生自天然氨基酸的咪唑鎓盐,并对其进行了手性位移试剂的NMR NMR对映鉴别。这些咪唑鎓受体包含不同的结构修饰,并且在添加相应的CSR之后,酸信号的分裂取决于这些结构变量。化合物8b对外消旋的Mosher酸表现出最强的手性溶剂化性能,被认为是确定其对映体组成的合适CSR。