Efficient syntheses of pillar[6]arene-based hetero[4]rotaxanes using a cooperative capture strategy.
نویسندگان
چکیده
While a single pillar[6]arene ring, nestling between two cucurbit[6]uril rings in a series of three hetero[4]rotaxanes, is conformationally mobile in solution, it adopts the energetically most favourable conformation with local C3V symmetry in the solid state.
منابع مشابه
Syntheses of a pillar[4]arene[1]quinone and a difunctionalized pillar[5]arene by partial oxidation.
A pillar[4]arene[1]quinone and a difunctionalized pillar[5]arene have been synthesized by partial oxidation.
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It was found that spontaneous isomerization takes place between three isomers of a pillar[5]arene (P5)-based pseudo[1]rotaxane. The isomerization process could be monitored by (1)H NMR spectra in polar solvent and the geometric configurations of the three isomers were further evaluated by theoretical calculations. In the threaded forms, the alkyl side chain might be preorganized by intramolecul...
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متن کاملPillar[5]arenes: fascinating cyclophanes with a bright future.
Pillar[5]arenes are [1(5)]paracyclophane derivatives consisting of 1,4-disubstituted hydroquinones linked by methylene bridges in the 2,5-positions. The first report of these novel macrocycles was in 2008, when 1,4-dimethoxypillar[5]arene was prepared in 22% yield, and subsequent improvements in synthetic methods have allowed the number of derivatives to expand significantly. In addition to D(5...
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ورودعنوان ژورنال:
- Chemical communications
دوره 50 47 شماره
صفحات -
تاریخ انتشار 2014