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Showing 1 to 12 of 12 for “"Oxazolines"”.
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The acidic sulfonimidation of aryl–oxazolines and the electrophilic fluorination of aryl–oxazolines
<p>Aryl oxazolines have been employed as directing groups for several different coupling reactions. In the exploration of using phenyl oxazoline as a directing group for electrophilic fluorination, it was discovered that acidic sulfonimide nucleophiles including dibenzenesulfonimide, …
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Kinetic studies of the metathesis of 1-hexene using Re2O7/γ-Al2O3 and the synthesis and metathesis of oxazolines
… and 1H nmr and mass spectroscopy. Obtaining the oxazolines in a good yield with high purity was difficult and consequently metathesis of the impure products did not occur.
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Applications of planar-chiral phosphaferrocene-oxazolines in asymmetric catalysis and enantioselective desymmetrization by carbon nucleophiles in the presence of chiral ligands
… the synthesis of planar-chiral phosphaferrocene-oxazolines, a new class of P,N-ligands, are described. The modular nature of their structure allows easy access to a number of analogues in enantiomerically pure forms, facilitating the easy tunability of the chiral environment. These ligands are …
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Synthesis of Novel Chiral Heterocyclic Compounds for Antibacterial Agents and Peptidomimetics
… such as 2-oxazolidinones, 1,3-oxazinan-2-ones, 2-oxazolines, oxazines, morpholine and morpholinones. Because of their interesting properties, chiral heterocycles have stirred great interest in the synthetic chemist community to develop useful and efficient strategies to these molecules. In this …
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Synthesis of heterocycles via isocyanide-based multi-component reactions
… bond. The application to the synthesis of oxazolines was explored and was shown to give good yields of 2-aryloxazolines. The reaction conditions developed use a PdCl₂/dppf catalytic system which enables the formation of an amidine intermediate. This intermediate then cyclises into the …
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Applications of C₂-symmetric bis(azaferrocenes) in asymmetric copper-catalyzed reactions
… resemblance to the highly versatile bis(oxazolines). These bis(azaferrocenes) have their stereogenic elements directly connected to their ligating atoms, which should help these heterocycles exert better stereodifferentiating ability when they are applied as ligands in metal-catalyzed …
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Bis-and tris (amidine) fluoroboron cations and related systems studies by Multinuclear NMR and fast atom bombardment mass spectometry
… been previously studied. Tetramethylguanidine, oxazolines and thiazolines can also produce similar reactions in D/BF3/BCI3 systems, but no significant BFnC4-n- species were observed. As well as influences of their basicity and their steric hindrance, N=C-R(X) (X = N, 0 or S) and N=C( X)2 (X = N …
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Development and application of carbon-carbon bond forming methodologies
… 5-exo and 6-endo cyclizations to produce novel oxazolines and oxazines respectively. A novel, asymmetric formal [3+2] cycloaddition utilizing substituted isocyanoacetates as stabilized dipoles was invented. The transformation yields chemically unique nitrogen containing heterocycles with two …
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Synthesis And Catalytic Studies Of Zinc Complexes Of Amido-Oxazolinate Ligands
… via a Pd-catalyzed amination reaction of chiral oxazolines with primary amines and amides. The obtained ligands were treated with Zn[N(SiMe3)2]2 to generate the corresponding C1-symmetric, monometallic zinc complexes. Single-crystal X-ray crystallographic studies confirm that most of the …
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Depozice tenkých polymerních vrstev v povrchovém DBD výboji
Plazmová polymerace je vysoce efektivní metoda pro tvorbu tenkých vrstev s unikátními vlastnostmi, které mohou být přizpůsobeny specifickým aplikacím. Tato práce se zaměřuje na depozici tenkých oxazolinových vrstev, konkrétně vrstev na bázi 2ethyl2-oxazolinu metodou plazmové polymerace. Povrchová …
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Funktionalisierte Poly(2-oxazoline) : kontrollierte Synthese, bioinspirierte Strukturbildung und Anwendungen
Funktionalisierte Poly(2-oxazoline) als neue Materialien stellen sowohl unter strukturellen Gesichtspunkten als auch im Hinblick auf potentielle Anwendungen eine interessante Polymerklasse dar. Die Ausbildung von hierarchischen Strukturen mit Poly(2-oxazolinen) über intermolekulare …