作者:Andrea Ragusa、Sara Rossi、Joseph M. Hayes、Matthias Stein、Jeremy D. Kilburn
DOI:10.1002/chem.200500444
日期:2005.9.19
properties with various dicarboxylate salts have been examined by using NMR titration and isothermal calorimetry experiments. Macrocycle 1, in particular, favours the 1:1 binding of N-protected L-glutamate and aspartate, but favours 1:2 binding of the corresponding D-amino acids in polar solvents (dimethyl sulfoxide and acetonitrile). The macrocycles, however, do not bind carboxylates at all in the
已经制备了一系列手性双硫脲大环1-4,并且已经通过使用NMR滴定和等温量热实验检查了它们与各种二羧酸盐的结合性质。大环化合物1特别有利于N-保护的L-谷氨酸和天冬氨酸的1:1结合,但有利于相应D-氨基酸在极性溶剂(二甲基亚砜和乙腈)中的1:1结合。但是,大环化合物在竞争性较低的溶剂氯仿中根本不结合羧酸盐。这些大环的结合特性对细微的结构变化敏感,如与1相比,大环2-4的结合特性发生了变化,这证明了这一点。