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首页> 外文期刊>Chemistry: A European journal >Using 'threading followed by shrinking' to synthesize highly stable dialkylammonium-ion-based rotaxanes
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Using 'threading followed by shrinking' to synthesize highly stable dialkylammonium-ion-based rotaxanes

机译：使用“先缩后缩”合成高度稳定的二烷基铵离子基轮烷

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Herein, we report a "threading followed by shrinking" approach for the synthesis of rotaxanes by using an "oxygen-deficient" macrocycle that contained two arylmethyl sulfone units and the dumbbell-shaped salt bis(3,5-dimethylbenzyl)ammonium tetrakis(3,5-trifluoromethylphenyl)borate as the host and guest components, respectively. The extrusion of SO_2 from both of the arylmethyl sulfone units of the macrocyclic component in the corresponding [2]pseudorotaxane resulted in a [2]rotaxane that was sufficiently stable to maintain its molecular integrity in CD_3SOCD_3 at 393 K for at least 5 h. Shrink wrap: A "threading followed by shrinking" method, which was used to extrude both arylmethyl sulfone motifs from the macrocyclic components of dialkylammonium-ion-based [2]pseudorotaxanes, afforded robust [2]rotaxanes that were sufficiently stable to maintain their molecular integrity in CD_3SOCD_3 at 393 K for at least 5 h (see figure).
机译：在这里，我们报告了一种“轮流收缩”方法，该方法通过使用“缺氧”大环来合成轮烷，该大环包含两个芳基甲基砜单元和哑铃状盐双（3,5-二甲基苄基）四铵（3 （5-三氟甲基苯基）硼酸酯分别作为主体和客体组分。从相应的[2]假轮烷中的大环组分的两个芳基甲基砜单元中挤出SO_2，产生的[2]轮烷足够稳定，可以在393 K下在CD_3SOCD_3中保持其分子完整性至少5小时。收缩包装：采用“先收缩后收缩”的方法，该方法用于从基于二烷基铵离子的[2]假轮烷的大环组分中挤出两个芳基甲基砜基序，从而提供了稳定的[2]轮烷，其稳定性足以维持其分子393 K下CD_3SOCD_3中的完整性至少5 h（请参见图）。

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