Journal
CHEMICAL SOCIETY REVIEWS
Volume 45, Issue 6, Pages 1720-1737Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cs00861a
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Funding
- Gobierno de Espana MINECO [CTQ2014-56295-R]
- Severo Ochoa Excellence Accreditation [2014-2018 SEV-2013-0319]
- FEDER funds [CTQ2014-56295-R]
- ICIQ Foundation
- MINECO
- ICREA Funding Source: Custom
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Molecular containers have attracted the interest of supramolecular chemists since the early beginnings of the field. Cavitands' inner cavities were quickly exploited by Cram and Warmuth to construct covalent containers able to stabilize and assist the characterization of short-Lived reactive species such as cydobutadiene or o-benzyne. Since then, more complex molecular architectures have been prepared able to store and isolate a myriad of fleeting species (i.e. organometaic compounds, cationic species, radical initiators...). In this review we cover selected examples of the stabilization of reactive species by encapsulation in molecular containers from the first reports of covalent containers described by Cram et al. to the most recent examples of containers with self-assembled structure (metal coordination cages and hydrogen bonded capsules). Finally, we briefly review examples reported by Rebek et al. in which elusive reaction intermediates could be detected in the inner cavities of self-folding resorcin[4]arene cavitands by the formation of covalent host guest complexes. The utilization of encapsulated reactive species in catalysis or synthesis is not covered.
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