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Showing 1 to 8 of 8 for “"Bis(oxazoline)"”.
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New Derivatives Of Pyridine-2,6-Bis(Oxazoline) For The Sensitization Of Visible And Near Infrared Emitting Lanthanide Ions
… The syntheses of derivatives of pyridine-2,6-bis(oxazoline) and of their lanthanide ion complexes was accomplished. These complexes have potential application as probes in biology and biochemistry, as well as serving as building blocks for polymers for lighting and display applications. Two …
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Studies in Asymmetric Catalysis. Part I. Lewis Base-Catalyzed Aldol Additions. Part II. Bis(oxazoline)palladium(ii)-Catalyzed Cyclopropanation
A variety of bis(oxazoline)palladium(II) complexes were prepared and tested in the cyclopropanation of ethyl (E)-cinnamate with diazomethane. Although an enantioselective process was never realized, effects of substitution on the ligand, catalyst loading studies, and other investigations led to a …
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Chemoinformatic methods for the identification of more optimal copper-bis(oxazoline) catalysts and mechanistic investigations into the catalytic, enantioselective tin-amine protocol
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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CoMFA Study of Chiral Catalysts
… developed for a set of 23 catalysts containing bis-oxazoline or phosphino-oxazoline ligands that are known to induce asymmetry during the Diels-Alder reaction of N-2-alkenoyl-1, 3-oxazolidine-2-one with cyclopentadiene. It is shown that extemely high q2 statistics can be derived using standard …
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Nickel-catalyzed asymmetric cross-couplings of secondary alkyl electrophiles and photoinduced, copper-catalyzed C-N couplings
… alkenylzinc reagents are achieved using a nickel/bis(oxazoline) catalyst. Section 1.2 describes stereoconvergent cross-couplings of secondary unactivated alkyl electrophiles, specifically, Negishi arylations and alkenylations of [alpha]-bromosulfonamides and abromosulfones with arylzinc reagents …
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Synthetic and stereochemical aspects of enantioselective copper catalysed C-H insertion reactions leading to cyclopentanones and sultones
… and their reactivity in intramolecular copper–bis(oxazoline)–NaBARF catalysed C–H insertion reactions. Excellent enantioselectivities of up to 91% ee were achieved in the synthesis of cyclopentanones and up to 95% ee in the synthesis of sultones. Chapter One contains a comprehensive review …
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Materials with supramolecular chirality : liqid crystals and polymers for catalysis
… liquid crystal phases containing C₂- symmetric bis(oxazoline) and pincer ligands is detailed. Finally, Chapter Five describes the immobilization of chiral monodentate oxazoline ligands for use as catalysts in asymmetric cyclopropanation. Preliminary results indicate that the heterogeneous system …
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Investigation of catalyst effects in enantioselective copper- and rhodium-mediated transformations of α-diazocarbonyl compounds
… with particular emphasis on the use of copper-bis(oxazoline)-mediated enantioselective C–H insertion reactions leading to enantioenriched cyclopentanone derivatives. Through the use of additives, the enantioselectivity achieved with the copper catalysts for the first time reaches synthetically …