Journal ArticleDOI
Controlling factors in the synthesis of cucurbituril and its homologues.
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TLDR
A wide range of reaction conditions are examined that include the effects of acid type, acid concentration, reactant concentrations, and temperature to both probe the mechanism and optimize the yields of isolated cucurbit[n]urils, where n = 5-10.Abstract:
The acid-catalyzed synthesis of cucurbit[n]urils from formaldehyde and glycoluril is poorly understood. In this paper, we examine a wide range of reaction conditions that include the effects of acid type, acid concentration, reactant concentrations, and temperature to both probe the mechanism and optimize the yields of isolated cucurbit[n]urils, where n = 5−10. A mechanism for the formation of these cucurbit[n]urils is presented. Individual cucurbit[n]urils were unambiguously identified in reaction mixtures using ESMS and 13C NMR.read more
Citations
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Journal ArticleDOI
Development of hydroxylated cucurbit[n]urils, their derivatives and potential applications
TL;DR: Developments based on derivatives of cucurbit[n]urils hydroxylated at the “equatorial” positions are summarized, as well as the potential applications of these molecules.
Journal ArticleDOI
Facile purification of rare cucurbiturils by affinity chromatography.
TL;DR: A practical method for the separation and purification of cucurbituril (CB) hexamers was developed on the basis of affinity chromatography using aminopentylaminomethylated polystyrene beads, which allows convenient, rapid isolation of rare substituted cucURbiturils.
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Lanthanide Complexes with Cucurbit[n]urils (n = 5, 6, 7) and Perrhenate Ligands: New Examples of Encapsulation of Perrhenate Anions
TL;DR: The reaction of lanthanide nitrates with cucurbit[n]urils under hydrothermal conditions in the presence of perrhenic acid and, for some of them, other reactants such as KNO(3) yielded 14 new complexes which were crystallographically characterized and present some original features.
Journal ArticleDOI
Selective molecular recognition of methylated lysines and arginines by cucurbit[6]uril and cucurbit[7]uril in aqueous solution
TL;DR: With CB[6], protonation of the guest carboxylate group is required for the formation of inclusion complexes with the LysMe(n) series, and the CB[7] host displays modest selectivity between the asymmetric and symmetric dimethylarginines, both of which bind more strongly than the parent arginine or monomethylarginine.
Journal ArticleDOI
Degradation of bidentate-coordinated platinum(II)-based DNA intercalators by reduced L-glutathione.
TL;DR: The major degradation product, [bis-mu-{reduced L-glutathione}bis-5,6-dimethyl-1,10-phenanthroline}bis{platinum(II)}] (2+) (5, 56MEGL), displays no cytotoxicity and is excluded as the source of the anticancer activity.
References
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Journal ArticleDOI
I. Ueber Condensationsproducte aus Glycoluril und Formaldehyd
Journal ArticleDOI
An efficient, enantioselective synthesis of the taxol side chain
TL;DR: Synthese de la chaine du taxol a partir du phenylacetylene avec comme etapes-cle une epoxydation asymetrique et la scission regioselective de l'epoxyde as mentioned in this paper.
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A Molecular Bowl with Metal Ion as Bottom: Reversible Inclusion of Organic Molecules in Cesium Ion Complexed Cucurbituril
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Cucurbituril as a ligand for the complexation of cations in aqueous solutions
TL;DR: The complex formation of the ligand cucurbituril with alkaline cations and other cations have been studied by means of solubility measurements in the presence of the salts in aqueous solutions at 25 °C.
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Host–guest complexes of cucurbituril with the 4-methylbenzylammonium lon, alkali-metal cations and NH4+
TL;DR: In this article, the existence of two different complexes of cucurbituril with 4-methylbenzylammonium ions was reported. But the 1 : 1 stability constants were not reported for the 2 : 1 complexes with different cations.