Fixed or Invertible Calixarene-Based Directional Shuttles

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• 作者：Teresa Pierro ; Carmine Gaeta ; Carmen Talotta ; Agostino Casapullo ; Placido Neri
• 刊名：Organic Letters
• 出版年：2011
• 出版时间：May 20, 2011
• 年：2011
• 卷：13
• 期：10
• 页码：2650-2653
• 全文大小：753K
• 年卷期：v.13,no.10(May 20, 2011)
• ISSN：1523-7052

文摘

The first examples of rotaxanes based on calixarenes threaded by dialkylammonium ions, which also represent the first examples of calixarene-based molecular shuttles, are reported. The base/acid treatment demonstrated that these systems act as molecular shuttles, which move between three sites on the axle. When small OMe groups are appended at the calix[6]arene lower rim an unprecedented inversion of its shuttling direction is observed, which occurs through a cone-to-cone inversion of the macrocycle.