Chemically Modified Cyclodextrins: An Attractive Class of Supramolecular Hosts for the Development of Aqueous Biphasic Catalytic Processes
TL;DR: In this paper, cyclic oligosaccharides composed of 6(α, 7(β) or 8(γ) glucopyranose units improve the mass transfer in aqueous-organic two-phase systems and are useful compounds to design new catalysts.
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Abstract: During these last years, cyclodextrins have contributed greatly to the development of catalytic processes in water. These cyclic oligosaccharides composed of 6(α), 7(β) or 8(γ) glucopyranose units improve the mass transfer in aqueous-organic two-phase systems and are useful compounds to design new catalysts. Thus, chemically modified cyclodextrins can be used to: (i) increase significantly the rate and selectivity of reactions catalyzed by water-soluble organometallic complexes, (ii) design new water-soluble ligands for aqueous organometallic catalysis, (iii) stabilize catalytically active noble metal nanoparticles in water and (iv) favour the dispersion and activation of the palladium on charcoal in water.
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References
A novel cyclodextrin homodimer with dual-mode substrate binding and esterase activity
Pinar Tastan,Engin U. Akkaya +1 more
TL;DR: A novel cyclodextrin homodimer with two β-cyclodesxtrin units tethered from the primary side by a tris(2-aminoethyl)amine linker was found to be hydrolytically active and showed a biphasic curve indicative of two different binding modes for the activated carbonate ester.
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High selectivity in the catalytic hydrogenation of acyl-substituted pyridines in alkaline solution: effect of complexation by β-cyclodextrin
TL;DR: In this article, a benzoyl-substituted pyridines are reduced in two consecutive steps, with hydrogen in aqueous alkaline solution in the presence of Pd/C under very mild conditions, to the corresponding alcohols and hydrocarbons in high yields.
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Surface active macromolecular and supramolecular complexes: design and catalysis
Edward A. Karakhanov,Yulia Kardasheva,Artem Kirillov,Anton L. Maximov,V.V. Predeina,E. A. Runova +5 more
TL;DR: A number of macromolecular and supramolecular catalysts which combine the functions of transition metal complex, phase transfer agent with molecular recognition ability has been designed as mentioned in this paper.
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Complexation of phosphine ligands with peracetylated-β-cyclodextrin in supercritical carbon dioxide: Effect of temperature and cosolvent on the equilibrium constant
TL;DR: In this paper, the interaction between peracetylated-β-cyclodextrin and tert-butyl and adamantyl functionalized triphenylphosphine derivatives was studied in supercritical carbon dioxide (scCO 2 ) based solvent media by UV-vis spectroscopy.
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