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Title

Easy access to modified cyclodextrins by an intramolecular radical approach

AuthorsÁlvarez-Dorta, Dimitri CSIC; León, Elisa I. CSIC ORCID ; Kennedy, Alan R.; Martín, Ángeles CSIC ORCID ; Pérez-Martín, Inés CSIC ORCID ; Suárez, Ernesto CSIC ORCID
KeywordsHost–guest systems
Cyclodextrins
Structure elucidation
Radical reactions
Hydrogen transfer
Issue Date16-Mar-2015
PublisherWiley-VCH
CitationAngewandte Chemie International Edition 54(12): 3674-3678 (2015)
AbstractA simple method to modify the primary face of cyclodextrins (CDs) is described. The 6I‐O‐yl radical of α‐, β‐, and γ‐CDs regioselectively abstracts the H5II, located in the adjacent D‐glucose unit, by an intramolecular 1,8‐hydrogen‐atom‐transfer reaction through a geometrically restricted nine‐membered transition state to give a stable 1,3,5‐trioxocane ring. The reaction has been extended to the 1,4‐diols of α‐ and β‐CD to give the corresponding bis(trioxocane)s. The C2‐symmetric bis(trioxocane) corresponding to the α‐CD is a stable crystalline solid whose structure was confirmed by X‐ray diffraction analysis. The calculated geometric parameters confirm that the primary face is severely distorted toward a narrower elliptical shape for this rim.
Publisher version (URL)https://doi.org/10.1002/anie.201412300
URIhttp://hdl.handle.net/10261/181194
DOI10.1002/anie.201412300
ISSN1433-7851
E-ISSN1521-3773
Appears in Collections:(IPNA) Artículos




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