New Dipeptides Containing Thiazolidine-4-carboxylic Acid Derivatives: Synthesis and Characterization Using NMR Techniques and X-Ray Data.
作者:Nadia PELLEGRINI、Bernard REFOUVELET、Gregorio CRINI、Olivier BLACQUE、Marek M. KUBICKI、Jean-Francois ROBERT
DOI:10.1248/cpb.47.950
日期:——
New dipeptides, structural analogues of known immunomodulating agents, were prepared by stereospecific condensation between 2-substituted thiazolidine-4-carboxylate esters with N-substituted L-proline or L-thiaproline. The structure of these compounds has been elucidated by combination of NMR methods and X-ray analysis. In addition, NMR measurements on dipeptides indicated the presence of S-cis and S-trans conformers around the amide bonds.
新二肽是已知免疫调节剂的结构类似物,通过立体特异性缩合2-取代的噻唑烷-4-羧酸酯与N-取代的L-脯氨酸或L-硫代脯氨酸制备。这些化合物的结构已通过NMR方法和X射线分析相结合得以阐明。此外,对二肽的NMR测量表明了在酰胺键周围存在S-顺式和S-反式构象体。