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Issue 10, 2010
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α-Cyclodextrins reversibly capped with disulfide bonds

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Per-O-methyl-6I,6IV-disulfanyl-6I,6IV-dideoxy-α-cyclodextrin undergoes air oxidation at pH 9 to exclusively form a monomeric species having an intramolecular disulfide linkage capping the C6I and C6IV positions. In contrast, its non-methylated analogue, 6I,6IV-disulfanyl-6I,6IV-dideoxy-α-cyclodextrin, gives a mixture of monomeric and dimeric species under the same conditions. Molecular models show that in both cases of the monomeric species, the disulfide bonds effectively close the primary rims of the cyclodextrin cavities. The disulfide bonds of the capped cyclodextrins could be cleaved by reduction with dithiothreitol. Thus, the macrocyclic system can interchange the open-ended and cup-like forms by the application of external stimuli.

Graphical abstract: α-Cyclodextrins reversibly capped with disulfide bonds

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The article was received on 16 Feb 2010, accepted on 22 Apr 2010 and first published on 09 Jun 2010

Article type: Paper
DOI: 10.1039/C0NJ00126K
Citation: New J. Chem., 2010,34, 2254-2260
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    α-Cyclodextrins reversibly capped with disulfide bonds

    L. Kumprecht, M. Buděšínský, P. Bouř and T. Kraus, New J. Chem., 2010, 34, 2254
    DOI: 10.1039/C0NJ00126K

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