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Showing 1 to 20 of 58 for “"Oxazoline"”.
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Preparation and Cycloaddition Reactions of Oxazoline Nitrogen Oxides
Oxazoline N-oxides have been prepared in medium to high yields under mild conditions by condensation of 2-(hydroxyamino)-2-methyl-1-propanol with ortho esters or amide acetals. 3 + 2 Cycloaddition reactions of the oxazoline N-oxides and the related pyrroline N-oxides with phenyl isocyanate, …
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Poly(2-alkyl-2-oxazoline) containing multiphase systems
… is focused on the polymerization of 2-alkyl-2-oxazoline homopolymers and 2-alkyl-2-oxazoline containing copolymers with well-defined structures. In addition, the potential of selected materials as polymer blend compatibilizers was briefly evaluated. The polymerization of 2-alkyl-2-oxazoline was …
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Size Exclusion Chromatography of Poly(2-ethyl-2-oxazoline) Homopolymers and Poly(ethylene oxide)-b-Poly(2-ethyl-2-oxazoline) Copolymers
… weights and distributions of poly(2-ethyl-2-oxazoline) oligomers and block copolymers as well as poly(2-ethyl-2-oxazoline) were investigated by SEC using multiple detectors. Both a universal calibration method and light scattering were used to determine molecular weights and molecular weight …
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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 …
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Characterization of poly(2-ethyl-2-oxazoline) polymer with soft ionization
… studied by soft ionization. The poly(2-ethyl-2-oxazoline) is an important water-soluble and heat sensitive polymer. The PEtOx has found many commercial applications and has a good potential in pharmaceutical industry.
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Asymmetric allylic C–H functionalization via palladium(II)/sulfoxide-oxazoline catalysis
… of oxidatively stable, chiral sulfoxide-oxazoline ligands for palladium(II)-catalyzed asymmetric allylic C–H oxidations and alkylations. The design principle is to combine the sulfoxide moiety, known to promote C–H cleavage, with a strongly coordinately oxazoline moiety that can anchor …
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The development of Pd(II)sulfoxide-oxazoline catalyzed allylic C—H functionalizations
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Engineering of poly(2-oxazoline)s for a potential use in biomedical applications
This PhD work is based on the design of poly(2-oxazoline) (POx) hydrogels and nanogels, by chemical or physical cross-linking, aimed to be used for biomedical applications. Nanogels were first prepared in dilute media and in inverse emulsion based on a statistical copolymer made of …
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Amphiphilic Poly(2-isopropyl-2-oxazoline)-block-poly(lactide) Nanoparticles as Drug Delivery Vehicles
… morphologies of water-soluble poly(2-isopropyl-2-oxazoline)-block-poly(DL-lactide) and poly(2-isopropyl-2-oxazoline)-block-poly(L-lactide) (PiPOx-b-PDLLA and PiPOx-b-PLLA) nanoparticles was obtained via Fluorescence Spectroscopy. Additionally, loading and release studies were carried out with …
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Synthesis and Characterization of Poly(2-Ethyl-2-Oxazoline) Functional Prepolymers and Block Copolymers
… characterization of functional poly(2-ethyl-2-oxazoline) (PEtOx) containing homo- and block copolymers that are potential materials for membrane-based water purification and gas separation, drug delivery, magnetic resonance imaging and tissue engineering applications. The polymerization of …
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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 paths …
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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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The development of novel hybrid poly (2-oxazoline)-based bioinks for 3D bioprinting: a comparative study with Pluronic F127
… copolymer which comprises poly(2-methyl-2-oxazoline) (POx) (A-block) and poly(2-n-propyl-2-oxazine) (POzi) (B-block) was investigated as the potential alternative for PF. In this work, two different hybrid platforms consisting of synthetic POx-b-POzi /natural polymer (chitosan or alginate) …
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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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Total Synthesis of Apratoxin A Analogues
… an efficient synthetic route towards the oxazoline analogue of apratoxin A that relies upon a late stage installation of the oxazoline moiety. The convergent nature of the synthetic route has provided us with access to several oxazoline analogues that will be assayed for anti-cancer …
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Synthesis, characterization and properties of epoxide containing block and alternating copolymers
… in this research. Poly(ethylene oxide-2-ethyl-2-oxazoline) (PEO) copolymers have been synthesized with poly(ethylene oxide) macroinitiators ranging from O.75K-40K. Monohydroxy functionalized PEO oligomers have been synthesized with potassium tert-butoxide as an initiator in tetrahydrofuran, and …
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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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Synthesis and Functionalization of Poly(ethylene oxide-b-ethyloxazoline) Diblock Copolymers with Phosphonate Ions
Poly(ethylene oxide) (PEO) and poly(2-ethyl-2-oxazoline) (PEOX) are biocompatible polymers that act as hydrophilic "stealth" drug carriers. As block copolymers, the PEOX group offers a wider variety of functionalization. The goal of this project was to synthesize a poly(ethylene …
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CoMFA Study of Chiral Catalysts
… 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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