PSEUDOROTAXANES, ROTAXANES AND CATENANES FORMED BY METAL IONS TEMPLATING
申请人:NATIONAL TAIWAN UNIVERSITY
公开号:US20140350242A1
公开(公告)日:2014-11-27
A pseudorotaxane, a rotaxane and a catenane are provided. The pseudorotaxane includes at least a macrocyclic host molecule, a guest molecule, and a metal ion. The host molecule contains at least a binding unit and an aromatic linking spacer. The guest molecule has at least a recognition unit. The metal ion is used to template the threading of the guest molecule through the macrocycle host molecule by coordinating to a binding pocket formed from the binding unit of the macrocycle and the recognition moiety of the guest molecule. Rotaxanes or catenanes can be synthesized from the pseudorotaxane complexes, with or without the metal template ion in their molecular structures.
Five additional macrocycles that allow Na<sup>+</sup> ion-templated threading of guest units featuring a single urea or amide functionality
作者:You-Han Lin、Chien-Chen Lai、Sheng-Hsien Chiu
DOI:10.1039/c3ob42418a
日期:——
Five analogues of the macrocycle BPX26C6 are also capable of recognizing single urea and/or amidefunctionalities in the presence of templating Na+ ions. We have unambiguously confirmed the formation of such [2]pseudorotaxane complexes in solution through syntheses of the corresponding [2]rotaxanes.
Picking up the thread: The macrocycle bis‐p‐xylyl[26]crown‐6 is capable of forming pseudorotaxane‐like structures with single, nonconjugatedurea or amide moieties when assisted by templating Na+ ions (see example). By using this approach, rotaxanes were synthesized with glycine residues or the repeating unit of nylon‐6,6 as key components in the threadlike units.