Synthetic Model of the Phosphate Binding Protein: Solid-State Structure and Solution-Phase Anion Binding Properties of a Large Oligopyrrolic Macrocycle
作者:Evgeny A. Katayev、Jonathan L. Sessler、Victor N. Khrustalev、Yuri A. Ustynyuk
DOI:10.1021/jo071106g
日期:2007.9.1
receptors 4−6 were synthesized via the anion-templated condensation of appropriately chosen dialdehyde and diamine building blocks. Whereas all three products could be obtained directly via the appropriate choice of reaction conditions, the larger [3+3] product, 6, which incorporates three of each precursor subunit, could also be obtained conveniently via an indirect procedure involving ring expansion of
大环受体4 - 6分别经由适当选择的二醛和二胺结构单元的阴离子为模板的缩合合成。而所有三种产品可以直接通过反应条件的适当选择,较大的[3 + 3]的产品,可以得到6,它结合了三个各前体亚单位的,也可以通过涉及的小环扩大的间接过程方便地获得[2 + 2]大循环4。详见前面(Sessler,JL; Katayev,EA;潘托斯,GD; Reshetova,MD; Khrustalev,VN;证券,VM; Ustynyuk,YA Angew。化学式2005,117,7552-7556; 。Angew化学,诠释 埃德 2005年,44,7386-7390),该环膨胀的热力学控制下发生在HSO存在4 -和H 2 PO 4 -的乙腈溶液中的阴离子,并用于转化实现4到6。络合物6 H 2 2 + ·HPO 4 2-的X射线晶体结构分析揭示了与磷酸盐结合蛋白(PBP)的活性位点非常相似,在硫酸盐结合蛋