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Synthesis of a Double-Spanned Resorc[4]arene via Ring-Closing Metathesis and Calculation of Aggregation Propensity
Ring-closing metathesis (RCM) catalyzed by a second-generation Grubbs catalyst has been used to synthesize resorc[4]arenes 2b–5b starting from undecenyl resorc[4]arene 1b fixed in the cone conformation. X-ray diffraction analysis of the major metathesis product, 3b (50% yield), revealed a cavity-sha...
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Published in: | Journal of organic chemistry 2014-11, Vol.79 (22), p.11051-11060 |
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Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Ring-closing metathesis (RCM) catalyzed by a second-generation Grubbs catalyst has been used to synthesize resorc[4]arenes 2b–5b starting from undecenyl resorc[4]arene 1b fixed in the cone conformation. X-ray diffraction analysis of the major metathesis product, 3b (50% yield), revealed a cavity-shaped architecture resembling a basket, endowed with a large intramolecular space (∼10 Å) and a strong propensity to self-assemble as a supramolecular trio of heterochiral dimers. This prompted us to investigate the aggregation propensity of basket 3b in THF/water solution by UV–visible spectroscopy. The cavitation Gibbs free-energy change (ΔΔG cav = 4.78 kcal mol–1) associated with the self-assembly of macrocycle 3b was calculated as a measure of the solvophobic interactions involved in the process. |
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ISSN: | 0022-3263 1520-6904 |
DOI: | 10.1021/jo502056v |