Synthetic lectins are molecules designed for the challenging task of biomimetic carbohydrate recognition in water. Previous work has explored a family of such systems based on bi/terphenyl units as hydrophobic surfaces and isophthalamide spacers to provide polar binding groups. Here we report a related receptor which employs a new spacer, 2,5-bis-(aminomethyl)-pyrrole, with an alternative (A-D-A) set of H-bonding valencies. The modified spacer leads to significant changes in binding selectivity, including a preference for glucose over all other tested substrates.
合成凝集素是为在
水中识别
生物仿生
碳水化合物这一具有挑战性的任务而设计的分子。以前的工作已经探索了一系列基于双/三
联苯单元作为疏
水表面和间
苯二甲
酰胺间隔物提供极性结合基团的此类系统。在这里,我们报告了一种相关的受体,它采用了一种新的间隔物--2,5-双(
氨基
甲基)
吡咯,具有一组可供选择的(A-D-A)H 键价。经过修饰的间隔物导致结合选择性发生了显著变化,包括对
葡萄糖的偏好超过了所有其他测试底物。