The preparation of low-generation dendrimers based on a simple calix[4]arene scaffold by insertion of the iminosugar-analogue C2-symmetric 3,4-dihydroxypyrrolidine is described. This methodology allows a rapid incorporation of a considerable number of iminosugar-like moieties in a reduced volume and in a well-defined geometry. The inclusion of alkali-metal ions (sodium and potassium) in the polar cavity defined by the acetamide moieties at the lower rim of the calixarene was demonstrated, which allows also the rigidification of the dendrimer structure and the iminosugar presentation in the clusters. The combination of the supramolecular properties of calixarenes with the advantage of a dendrimeric presentation of repetitive units opens up the possibility of generating well-defined multivalent and multifaceted systems with more complex and/or biologically relevant iminosugars.
基于简单的杯[4]芳烃支架制备低代数树状聚合物,通过插入类似亚胺糖的C2对称3,4-二羟基吡咯烷来实现。这种方法允许在较小的体积和明确定义的几何形状中快速引入大量类似亚胺糖的基团。在杯芳烃底部的乙酰胺基团定义的极性腔中展示了碱金属离子(钠和钾)的包容,这也使得树状聚合物结构变得更加刚性,并在团簇中呈现亚胺糖。将杯芳烃的超分子特性与树状聚合物呈现重复单元的优势相结合,为生成具有更复杂和/或生物相关亚胺糖的明确定义多价和多方面系统打开了可能性。