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Tesis sobre el tema "Oxazine chemistry"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 15 de febrero de 2022

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1

Stretch, W. "The chemistry of 3-ethoxycarbonyl-5, 6-dihydro-4H-1, 2-oxazines : An approach to the synthesis of betagamma-deydroaminoacids." Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370847.

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2

Han, Lu. "UNDERSTANDING THE VIBRATIONAL STRUCTURE, RING-OPENING KINETICS OF OXAZINE RING AND HYDROGEN BONDING EFFECTS ON FAST POLYMERIZATION OF 1,3-BENZOXAZINES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1523026767260573.

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3

Choi, Adam. "Illuminating Biology with Membrane Penetrating Sulfonate Delivery Scaffolds and Near-Infrared Azasiline Fluorophores." eScholarship@UMMS, 2018. https://escholarship.umassmed.edu/gsbs_diss/997.

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Near-infrared (NIR) light, with wavelengths of 650 to 900 nanometers, effectively penetrates tissues. The high signal to noise ratio and low phototoxicity of NIR light makes this wavelength range ideal for deep tissue imaging. However, current NIR fluorophores are generally large hydrophobic molecules that are prone to aggregation. Sulfonation can enhance aqueous solubility, but their anionic nature prevents membrane diffusion, and thus, restricts the applications of sulfonated molecules to in vitro or fixed cells. The repertoire of commercially available sulfonated NIR probes is mostly limite

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4

Tilliet, Mélanie. "Synthesis and study of new oxazoline-based ligands." Doctoral thesis, KTH, Organisk kemi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4858.

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This thesis deals with the study of oxazoline-based ligands in metal-catalyzed asymmetric reactions. The first part describes the synthesis of six new bifunctinal pyridine-bis(oxazoline) ligands and their applications in asymmetric metal-catalysis. These ligands, in addition to a Lewis acid coordination site, are equipped with a Lewis basic part in the 4-position of the oxazoline rings. Dual activation by means of this system was probed in cyanide addition to aldehydes. The second part is concerned with the synthesis of two pyridine-bis(oxazoline) ligands bearing bulky triazole groups in the 4

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5

Zocher, Eva Maria. "Gas-phase and solution-state chemistry of copper(I) bis-oxazoline complexes /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18009.

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6

Clarke, Richard John. "Mesopore immobilised bis(oxazoline) catalysts for enantioselective catalysis." Thesis, University of Birmingham, 2003. http://etheses.bham.ac.uk//id/eprint/3578/.

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Mesoporous silica materials have the potential to replace many conventional silicas for uses such as supports for heterogeneous catalysis and absorbents. The large pore size and high surface area make them ideal for supporting bulky organometallic catalysts for enantioselective reactions. We have immobilised chiral bis(oxazoline) metal complexes onto the surfaces of some of these versatile supports (MCM-41 and MCM-48) via different tethering strategies. The resulting heterogeneous catalysts were shown to be highly active in the enantioselective cyclopropanation of styrene with ethyl diazoaceta

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7

Herbert, Simon Anthony. "Oxazoline directed lithiation of Calix[4]arene and Ferrocene." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17867.

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Thesis (PhD)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: The use of chiral oxazoline directed lithiation provides a highly diastereoselective (up to >99% de) route to meta functionalised inherently chiral calixarenes. This methodology can be used on both the butylated and debutylated calixarene systems and is tolerant of a wide range of different electrophillic quenches allowing access to a structurally diverse range of inherently chiral metafunctionalised calixarenes. The oxazoline directing group can be removed via hydrolysis, generating a range of functionalised calixarene car

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8

Dixon, Wendy Jane. "Kinetic studies of the addition of water oxazines and the formation of ring opened products." Thesis, King's College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264933.

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9

Jordan, Rainer, and Dan Gieseler. "Poly(2-oxazoline) molecular brushes by grafting through of poly(2-oxazoline)methacrylates with aqueous ATRP." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-188802.

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Molecular brushes of poly(2-oxazoline)s (POx) are an intriguing class of polymers as they combine a unique architecture with the properties of POx as a biomaterial. Here, the synthesis of several POx macromonomers with methacrylate end groups and consecutive grafting through polymerization by aqueous atom transfer radical polymerization (ATRP) at room temperature is reported. 1H-NMR spectroscopy and size exclusion chromatography (SEC) confirmed the synthesis of POx molecular brushes with maximum side chain grafting densities, narrow molar mass distributions (Đ ≤ 1.16) and final molar masses co

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10

Schneider, Nathanaëlle. "N-heterocyclic carbenes with an oxazoline unit : Synthesis, coordination chemistry and application in asymmetric catalysis." Strasbourg 1, 2008. http://www.theses.fr/2008STR13057.

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Le succès d’un catalyseur asymétrique n’est possible que si son ligand chiral est judicieusement conçu. La combinaison d’un carbène N-hétérocyclique avec un cycle oxazoline s’avère particulièrement prometteuse. Une nouvelle famille de sels d’imidazolium, où ces deux hétérocycles sont liés par un pont (diméthyl)méthylène a été générée. Les précurseurs imidazoliums sont obtenus par réaction d’un dérivé bromé avec un imidazole portant un cycle oxazoline. Sept différents précurseurs de carbènes ont pu être générés (rendements compris entre 60 et 90%), et les carbènes libres 1-(1-méthyl-1-((4S)-iso

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11

Counceller, Carla Marie. "Development of Novel Methodologies for the Synthesis and Functionalization of Nitrogen Heterocycles." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275047798.

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12

Viswanathan, Subha. "Nitro- and oxazoline-derivatized antennas structural and photophysical characterization of their lanthanide complexes /." Related electronic resource:, 2007. http://proquest.umi.com/pqdweb?did=1362530571&sid=2&Fmt=2&clientId=3739&RQT=309&VName=PQD.

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13

Fisher, Adam. "Some novel biological applications of polymers based on poly(2-oxazoline)s." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/380885/.

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Poly(2-oxazoline)s have attracted much attention in recent times due to their potential advantages over other similar polymers. They are easy to synthesise while maintaining control over length, polydispersity and functionality1, 2. Furthermore the 2-methyl and 2-ethyl poly(2-oxazoline)s have both been shown to be ‘stealth’ biopolymers similar to that of poly(ethyleneglycol), (PEG)3 suitable for biological applications. Poly(2-isopropy-2-oxazoline), poly(2-n-propyl-2-oxazoline) and poly(2-ethyl-2-oxazoline) have all been found to show thermoresponsive behaviour and are therefore potential alte

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14

Cai, Gangfeng. "Synthesis and characterization of oxazoline homopolymers, random and block copolymers." Case Western Reserve University School of Graduate Studies / OhioLINK, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=case1055356803.

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15

Naik, Manisha. "Studies towards the total synthesis of seco-halichondramide." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299704.

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16

Xiao, Li. "Synthetic Apratoxin F and Novel Analogues - Molecules for Anticancer Mechanistic and Therapeutic Applications." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1512083096370725.

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17

Luanphaisarnnont, Torsak. "Reactions of Diketones and N-Allenoyloxazolidinones Catalyzed by Metal-Bis(oxazoline) Complexes." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10033.

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This dissertation describes the investigation of the utility of metal–bis(oxazoline) complexes in catalytic asymmetric reactions. The development of Cu(II)-catalyzed regio- and enantioselective additions of silylketenthioacetals into diketones is discussed in the first chapter. \(Cu(OTf)_2(t-BuBox)\) complexes were found to be an effective catalyst with a broad substrate scope, providing tertiary alcohols in high yields, regioselectivities, and enantioselectivities. A model that accounts for the absolute stereochemistry of the product based on A1,3–interaction was proposed. Relative reactiviti

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18

Owen, Mari Elena. "A structural and mechanistic understanding of copper(II)-bis(oxazoline) catalysed asymmetric aziridination : an EPR and ENDOR investigation." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/57412/.

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X- and Q-band EPR/ENDOR spectroscopy was used to study the structure of a series of heteroleptic and homoleptic copper(II)-bis(oxazoline) complexes, based on the (−)-2,2′-isopropylidenebis[(4S)-4-phenyl-2-oxazoline] (1) ligand and bearing different counterions (chloride versus triflate); labelled [Cu(II)(1a-c)]. The geometry of the two heteroleptic complexes, [Cu(II)(1a)] and [Cu(II)(1c)], was found to depend on the choice of counterion. Formation of the homoleptic complex was only evident when the Cu(II)(OTf)2 salt was used whereas Cu(II)Cl2 inhibited the transformation from heteroleptic to h

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19

Wellhausen, Jeffrey Daniel. "Design of functional RNAs through combinatorial selections and characterization of a fluorescent cytosine analogue in DNA /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/8507.

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20

Chellat, Mathieu François. "Studies Toward the Total Synthesis and Structure Determination of Leiodelide A." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313173469.

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21

Lauer, Matthew Gregory. "I. Progress Toward Leiodelide A II. Palladium-Catalyzed Reactions of Enol Ethers." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1355256397.

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22

Greß, Anja. "Funktionalisierte Poly(2-oxazoline) : kontrollierte Synthese, bioinspirierte Strukturbildung und Anwendungen." Phd thesis, Universität Potsdam, 2008. http://opus.kobv.de/ubp/volltexte/2008/1864/.

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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 Wasserstoffbrückenbindungen ist hierbei ein bisher nicht beachteter Aspekt. Über einen bioinspirierten Ansatz sollten gezielt funktionelle Gruppen, die für einen hierarchischen Aufbau, z.B. in Proteinen, verantwortlich sind, in vereinfachter Weise auf die synthetische Substanzklasse der Poly(2-oxazoline) übertragen

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23

Trifonova, Anna. "Synthesis of Novel Chiral Bicyclic Ligands and their Application in Iridium-Catalyzed Reactions." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5783.

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24

Chatterley, Alexander. "Benzisoxazoles : new routes to coleophomone analogues." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/16261.

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This project has been part of an ongoing interest in metabolites with a cyclic tricarbonyl motif 1, usually enolised. Coleophomones A C have a unique architecture with the cyclic tricarbonyl motif embedded in an 11-membered ring: A & B exist in aldol equilibrium, B & C are geometric isomers, and D lacks the macrocycle.1,2 Antifungal & antibiotic activity, and inhibition of human heart chymase & bacterial cell-wall transglycosylase, has generated synthetic interest. In an approach distinct from reported studies,3 we propose 4-carbonyl-substituted isoxazoles, from dipolar cycloaddition of nitril

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25

Nakafuku, Kohki Mitchell. "Radical Relay Strategies for C-H Functionalization of Alcohols." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555519365273501.

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26

Guillerm, Brieuc. "Synthèse et étude physico-chimique de copolymères amphiphiles à base de poly(2-méthyl-2-oxazoline)." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20102/document.

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Ce travail de thèse décrit l'élaboration de copolymères amphiphiles obtenus par couplage de deux homopolymères. La synthèse des copolymères s'est effectuée en deux étapes. Dans un premier temps, des homopolymères de type poly(2-méthyl-2-oxazoline) (P(MOx)) et poly(acrylate de tert-butyle) (P(At-Bu)) ont été préparés par polymérisation par ouverture de cycle cationique (CROP) et par polymérisation radicalaire contrôlée de type RAFT ou ATRP, respectivement. Puis les copolymères amphiphiles diblocs ont finalement été obtenus par une réaction de couplage polymère-polymère de type cycloaddition de

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27

Kindahl, Tomas. "Synthesis and development of compounds for nonlinear absorption of light." Doctoral thesis, Umeå universitet, Kemiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-60190.

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High-intensity light — for instance that from a laser — can be destructive, not only to the human eye, but also to equipment such as imaging sensors and optical communication devices. Therefore, effective protection against such light is desirable. A protection device should ideally have high transmission to non-damaging light, and should also be fast-acting in order to effectively stop high-intensity light. In working towards a protection device, there is a need to conduct fundamental research in order to understand the processes involved. One of the photophysical processes of special interes

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28

Walli, Adam. "Biomimetic Copper(I)-Mediated Activation of Dioxygen and Redox Non-Innocence in Copper(II) Complexes of Bis(oxazoline)s." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://hdl.handle.net/11858/00-1735-0000-0023-9636-9.

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29

Biet, Thomas. "Ligands Électroactifs Multifonctionnels et Chiralité Hélicoïdale dans les Tétrathiafulvalènes." Phd thesis, Université d'Angers, 2012. http://tel.archives-ouvertes.fr/tel-00829433.

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Ce travail s'articule autour de deux grands axes : les ligands électroactifs et la chiralité hélicoïdale dans les tétrathiafulvalènes, avec l'élaboration de TTF-triazoles, TTF-bis(bis-oxazolines) et de TTF-hélicènes. La synthèse de TTF-triazoles via deux stratégies de click chemistry, CuAAC et RuAAC, a permis d'obtenir une bibliothèque de ligands électroactifs mono- et polydentates dont les structures cristallines sont reportées ainsi que l'étude théorique des TTF-mono-triazoles. La capacité de ces ligands à coordiner a été testée avec la synthèse et la caractérisation structurale de complexes

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30

Pauff, Steven M. "Advancements in the Synthesis and Application of Near-Infrared Imaging Reagents: A Dissertation." eScholarship@UMMS, 2001. http://escholarship.umassmed.edu/gsbs_diss/751.

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Fluorescence-based imaging techniques provide a simple, highly sensitive method of studying live cells and whole organisms in real time. Without question, fluorophores such as GFP, fluorescein, and rhodamines have contributed vastly to our understanding of both cell biology and biochemistry. However, most of the fluorescent molecules currently utilized suffer from one major drawback, the use of visible light. Due to cellular autofluorescence and the absorbance of incident light by cellular components, fluorescence imaging with visible wavelength fluorophores often results in high background no

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31

Pauff, Steven M. "Advancements in the Synthesis and Application of Near-Infrared Imaging Reagents: A Dissertation." eScholarship@UMMS, 2015. https://escholarship.umassmed.edu/gsbs_diss/751.

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Fluorescence-based imaging techniques provide a simple, highly sensitive method of studying live cells and whole organisms in real time. Without question, fluorophores such as GFP, fluorescein, and rhodamines have contributed vastly to our understanding of both cell biology and biochemistry. However, most of the fluorescent molecules currently utilized suffer from one major drawback, the use of visible light. Due to cellular autofluorescence and the absorbance of incident light by cellular components, fluorescence imaging with visible wavelength fluorophores often results in high background no

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32

Allen, Kevin John Harvey. "Developing New Ligand Platforms for MRI Contrast Agents." Thesis, 2014. http://hdl.handle.net/1828/5448.

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A series of lanthanide complexes, {[CpCo(P=O(OR)2)3]2Ln(H2O)x}+Cl- (Ln = Nd, Eu, Tb, Yb; R = Et, Ph), (Kläui)2Ln, were prepared. The related complex {[CpCo(P=O(OPh)2)3]2Yb}+ [CoCl3(THF)]- was crystallographically characterized and the cation in this case was confirmed to be 6-coordinate and solvent free. To determine the Kläui complexes potential as magnetic resonance (MR) imaging agents, ligand exchange rates between the d0- and d60-isotopomers of the Kläui lanthanide complexes were determined in acetonitrile by electrospray mass spectrometry. The ligand exchange rate was found to increase

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33

Lafon, Adeline. "La poly(2-isopropyl-2-oxazoline) et ses dérivés en solution aqueuse et aux interfaces." Thèse, 2016. http://hdl.handle.net/1866/18436.

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La poly(2-isopropyl-2-oxazoline) (PIPOZ) est un polymère thermosensible qui possède une température de solution critique inférieure (LCST) autour de 40 °C en solution aqueuse. Les travaux présentés s’intéressent aux propriétés en solution aqueuse et aux interfaces, de l’homopolymère PIPOZ, d’une PIPOZ fonctionnalisée avec un groupement lipidique (lipo-PIPOZ) et de copolymères à blocs à base de poly(éthylène glycol) et de PIPOZ. Si elle est régulièrement comparée à son isomère structurel le poly(N-isopropylacrylamide) (PNIPAM), les études sur les propriétés en solution de la PIPOZ sont cependa

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34

Chen, Ssu-Chin, and 陳思瑾. "Plasma induced grafting and click chemistry methods for the immobilization of poly(2-ethyl-2-oxazoline) on the surfaces of polymethyl methacrylate (PMMA) and stainless steel and to study the related applications." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/20211682605712109560.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>102<br>In this thesis, poly(2-ethyl-2-oxazoline) (PEOXA) was synthesized by cationic ring opening polymerization. The synthesized PEOXA was further used to be altered with different end functional groups in order to be incorporated on polymethyl methacrylate (PMMA) and stainless steel (SS) surfaces by plasma induced grafting and cycloaddition reaction methods, respectively. The synthesized PEOXA molecules were evaluated by Fourier Transform Infrared Spectroscopy (FTIR) and 1H NMR. The effects of surface modifications on surface of PMMA and stainless steel were charac

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35

Bullet, Jean-Richard. "Synthèse et étude d’architectures complexes à base de poly(lactide) et de poly(2-isopropyl-2-oxazoline) pour des applications biomédicales." Thèse, 2016. http://hdl.handle.net/1866/21124.

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Le traitement du cancer est l’un des plus grands défis en chimie médicinale moderne. La majorité des traitements utilisés repose sur la chimiothérapie, impliquant l’emploi de molécules bioactives cytotoxiques. Bien qu’efficaces, ces molécules présentent, pour la plupart, des désavantages notoires tels que le manque de spécificité cellulaire et une solubilité limitée en phase aqueuse. Une façon de remédier aux problèmes exposés est de solubiliser ces molécules au sein de matrices polymères. Il existe différents types de matrices qui sont : les liposomes, les micelles, les nanosphères, les nanoc

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36

Barfüßer, Sebastian Ulrich. "Kupfer- und palladiumkatalysierte N H- und C H-Bindungsfunktionalisierungen zur effizienten Synthese von Heterocyclen." Doctoral thesis, 2011. http://hdl.handle.net/11858/00-1735-0000-0006-B09A-0.

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