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Supramolecular Ligand (supramolecular + ligand)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

ChemInform Abstract: Per-6-amino-,-cyclodextrin as an Efficient Supramolecular Ligand and Host for Cu(I)-Catalyzed N-Arylation of Imidazole with Aryl Bromides.

CHEMINFORM, Issue 15 2009
Palaniswamy Suresh
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

PhthalaPhos: Chiral Supramolecular Ligands for Enantioselective Rhodium-Catalyzed Hydrogenation Reactions,

ANGEWANDTE CHEMIE, Issue 37 2010
Luca Pignataro Dr.
Wasserstoffbrücken verknüpfen chirale einzähnige Phosphitliganden mit H-Brückendonor- und -akzeptorgruppen zu supramolekularen zweizähnigen Liganden, deren Rhodiumkomplexe (siehe Bild) bei der katalytischen Hydrierung von Standard- und industrierelevanten Substraten hohe Enantiomerenüberschüsse ergeben. cod=1,5-Cyclooctadien. [source]

Fine-Tuning Ligands for Catalysis Using Supramolecular Strategies

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 29 2007
Vincent F. Slagt
Abstract Coordinative bonds have been used to prepare supramolecular ligands leading to well-defined catalysts formed by assembly. The construction of these ligands is based on selective metal,ligand interactions between nitrogen donor atoms of phosphorus-nitrogen building blocks and various zinc(II) porphyrins. The major advantage of this supramolecular approach of catalyst preparation is the simplification of ligand variation enabling straightforward modification of steric, electronic and chiral properties of the supramolecular ligand. A large number of new ligands becomes accessible by this modular variation of the building blocks. The ligand assembly based on pyridyl phosphites and zinc(II) porphyrin with electron-withdrawing substituents led to a twelve-fold increase in activity and an increase in enantioselectivity from 17 to 50,% in the rhodium-catalyzed hydrogenation of dimethyl itaconate. The first examples of assemblies based on non-chiral ligands and chiral zinc(II) porphyrin template molecules show, as proof of principle, an enantiomeric excess up to 18,% in the asymmetric palladium-catalyzed allylic alkylation. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source]