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Structure and Properties of Modular Components for Applications in Topological Supramolecular Chemistry

机译:拓扑超分子化学中应用的模块化组件的结构和性质

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摘要

As a practical application of the structure of products derived from simple reactions of modular components, the background to a system for topological supramolecular assembly is introduced. Familiar base-catalyzed carbonyl condensation chemistry, acting on combinations of cyclic 1,3-diketones and aromatic aldehydes, provides thermodynamically controlled access to molecular entities of appropriate bulk to,let as stoppers in rotaxane structures. Under acid-catalyzed reaction conditions, an additional, irreversible, dehydration step is introduced, thereby providing a putative mechanism for locking in place a specified topology. These ideas are illustrated with the preparation and X-ray structures of model systems derived from 5,5-dimethylcyclohexane-1,3-dione and two model aromatic dialdehydes, representing the results of the application of both reversible and irreversible reaction conditions. Additional model compounds are employed to demonstrate reaction reversibility in the former case.
机译:作为从模块化组件的简单反应派生的产品结构的实际应用,介绍了拓扑超分子组装系统的背景。熟悉的碱催化羰基缩合化学作用于环状1,3-二酮和芳族醛的组合,提供热力学控制进入适当体积的分子实体的途径,以作为轮烷结构中的终止剂。在酸催化的反应条件下,引入了额外的不可逆的脱水步骤,从而提供了一种用于将特定拓扑锁定在适当位置的推定机制。用5,5-二甲基环己烷-1,3-二酮和两种芳族二醛模型衍生的模型系统的制备和X射线结构说明了这些想法,它们代表了可逆和不可逆反应条件应用的结果。在前一种情况下,使用其他模型化合物来证明反应可逆性。

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