Pyrrolic Tripodal Receptors for the Molecular Recognition of Carbohydrates: Ditopic Receptors for Dimannosides
作者:Oscar Francesconi、Cristina Nativi、Gabriele Gabrielli、Matteo Gentili、Marco Palchetti、Beatrice Bonora、Stefano Roelens
DOI:10.1002/chem.201204298
日期:2013.8.26
designed receptors being the most effective receptors of the set, together with a distinct preference of the dimannosides for the (S) enantiomer of the receptor in all cases. A 3D view of the recognition mode was elucidated by a combined NMR spectroscopic/molecular modeling approach, showing the dimannoside included in the cleft of the receptor. Compared to the monotopic precursors, the ditopic receptors
合成的二位受体设计用于二甘露糖苷的分子识别,其方法是通过桥接两个单位单元,有效识别甘露糖苷与适当大小和柔性的连接基,并赋予氢键基团。通过极性有机介质(在氯仿中30-40%DMF)中的NMR光谱和等温滴定热量法(ITC)测定了与生物学相关的Manα(1-2)Man二糖对α和β糖苷的亲和力。在大多数情况下,观察到在微摩尔范围内具有显着的选择性和亲和力,其中两个新设计的受体是该组中最有效的受体,并且二甘露糖苷对(S)在所有情况下的受体对映体。通过结合的NMR光谱/分子建模方法阐明了识别模式的3D视图,显示了受体缝隙中包含的双甘露糖苷。与单位前体相比,双位受体显示出明显改善的识别特性,证明了模块化受体设计对双糖识别的功效。