An adamantane-based disubstituted binding motif with picomolar dissociation constants for cucurbit[n]urils in water and related quaternary assemblies
作者:E. Babjaková、P. Branná、M. Kuczyńska、M. Rouchal、Z. Prucková、L. Dastychová、J. Vícha、R. Vícha
DOI:10.1039/c6ra23524g
日期:——
A non-axial centerpiece based on 1,3-disubstituted adamantane was designed, and three new guests were prepared. In the structure of the heterotritopic guests, the central adamantane site was combined with two terminal butyl or 1-adamantyl sites. The new central binding motif displayed an extraordinarily high affinity towards CB8 (Ka = (5.3 ± 0.3) × 1012 M−1 in water) to allow formation of quaternary
设计了一种基于1,3-二取代金刚烷的非轴心组件,并准备了三位新宾客。在杂三位客体的结构中,金刚烷的中心位点与两个末端的丁基或1-金刚烷基位点结合在一起。新的中央结合基序表现出对CB8的极高亲和力(K a =(5.3±0.3)×10 12 M -1在水中),以允许形成具有取决于大环化合物性质的几何形状的四级组装体。根据单独的结合强度,用CB8代替CB7导致四元组装的反向排列;IE,β-CD在中央部位被两个CB7单元封端,而CB8更喜欢在中央部位被两个β-CD单元封端。