已经通过使用二甲基取代的甘脲的二聚体以受控方式合成了对称的八甲基取代的葫芦丁,该二聚体又在甲醛缺乏的条件下合成。通过NMR光谱,ESI质谱和单晶X射线衍射分析对二甲基取代的甘脲的二聚体和对称的八甲基取代的葫芦巴进行了表征。值得注意的是二甲基取代的甘脲的二聚体的结构,因为它构成了有用的新的结构单元,该新的构成单元可允许形成在某些位置具有取代基或在其主链上具有有限数目的次甲基的此类葫芦[ n ]脲。
Controllable Synthesis of Dodecamethylcucurbit[6]uril and Its Application in Separating Phenylenediamine Isomers
作者:Long Cao、Yun-Qian Zhang、Rui-Lian Lin、Jing-Xin Liu、Zhu Tao
DOI:10.1021/acs.cgd.1c00141
日期:2021.5.5
interactions between Me12Q[6] and phenylenediamine (PDA) isomers were also investigated both in the solid state and in aqueous solution. Importantly, the Me12Q[6]/[ZnCl4]2–-based supramolecular framework can selectively accommodate o-PDA rather than its isomers. The present study suggests the practical application of Me12Q[6] in separating PDA isomers and the potential utility of Me12Q[6] in isolating other
o-Tetramethyl-substituted cucurbituril (o-TMeQ[6]), a polydentate ligand, has been synthesized and isolated in a controlled manner by using a dimer of dimethyl-substituted glycoluril and a dimer of unsubstituted glycoluril. Coordination assemblies have been investigated by reactions between alkalineearth cations and o-TMeQ[6] in the presence of [CdCl4]2–, a structure inducer, in HCl aqueous solution