Benzo-21-crown-7-Based [1]Rotaxanes: Syntheses, X-ray Crystal Structures, and Dynamic Characteristics

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• 作者：Qizhong Zhou ; Peifa Wei ; Yanyan Zhang ; Yihua Yu ; Xuzhou Yan
• 刊名：Organic Letters
• 出版年：2013
• 出版时间：October 18, 2013
• 年：2013
• 卷：15
• 期：20
• 页码：5350-5353
• 全文大小：286K
• 年卷期：v.15,no.20(October 18, 2013)
• ISSN：1523-7052

文摘

Two B21C7-based [1]rotaxanes were synthesized in high yields by means of copper(II)-mediated Eglinton coupling and a subsequent Pd/C-catalyzed reduction under H₂. X-ray single-crystal analysis shows that [1]rotaxane takes on a self-entangled conformation, wherein the macrocycle is threaded by its own tail. Moreover, it was found that [1]rotaxane with a flexible skeleton had more rotational motions than that of one with a rigid skeleton.