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High Yielding Template-Directed Syntheses of [2]Rotaxanes

✍ Scribed by José A. Bravo; Françisco M. Raymo; J. Fraser Stoddart; Andrew J. P. White; David J. Williams

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
331 KB
Volume
1998
Category
Article
ISSN
1434-193X

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✦ Synopsis

Three dumbbell-shaped compounds incorporating terminal chains of the templates influences the efficiencies of the template-directed syntheses. Rotaxane formation occurs only triisopropylsilyl stoppers, connected to a central 1,5dioxynaphthalene recognition site by [-CH 2 CH 2 O-] n spacers if n Ͼ 1 and, when n = 3 the corresponding [2]rotaxane can be isolated in a yield as high as 72 %. This remarkable yield (n = 1-3), have been synthesized. These compounds have been employed as templates for the synthesis of [2]rotaxanes is the highest ever obtained for the template-directed syntheses of [2]rotaxanes incorporating donor/acceptor incorporating cyclobis(paraquat-p-phenylene) as the ring component. It was found that the length of the polyether interactions.

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