A Prototype Calix[4]arene-Based Receptor for Carbohydrate Recognition Containing Peptide and Phosphate Binding Groups
作者:Margarita Segura、Barbara Bricoli、Alessandro Casnati、Eva Maria Muñoz、Francesco Sansone、Rocco Ungaro、Cristina Vicent
DOI:10.1021/jo034471q
日期:2003.8.1
A novel class of macrobicyclic receptors for carbohydrate recognition based on upper rim, peptide-bridged calix[4]arenes has been designed and synthesized. Receptor 12, in which a charged phosphate group cooperates with peptide hydrogen-bonding donor and acceptor groups in the binding process, is the most efficient and selective in the complexation of simple carbohydrate derivatives. The selectivity
设计并合成了一种基于上边缘的新型糖链识别大双环受体,肽桥杯[4]芳烃。在简单的碳水化合物衍生物的络合中,带电的磷酸基团与肽的氢键结合的供体和受体基团协同作用的受体12是最有效和选择性的。观察到的选择性是对β-葡萄糖苷13a的选择性(与相应的α端基异构体13b(DeltaG度= 17.0 kJ mol(-)(1))相比,结合更好(DeltaG度= 19.6 kJ mol(-)(1))和到β-半乳糖苷13c(DeltaG度= 17.7 kJ mol(-)(1))在CDCl(3)中。通过主体12中的磷酸基团的酯化或通过β-葡糖苷和β-半乳糖苷衍生物中2和3位的OH基的烷基化,观察到稳定常数的大幅下降。基于对可用的(1)H NMR数据的仔细分析,提出了β-辛基葡糖苷13a与受体12的结合模式。