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Dissertations / Theses on the topic 'Diaryl ethers'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Sen, Subhabrata. "Sythesis of diaryl ethers and diaryl amines via Dötz benzannulation /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3030540.

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2

Page, Abigail. "Atropisomeric diaryl ethers and other non-biaryl atropisomers." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/atropisomeric-diaryl-ethers-and-other-nonbiaryl-atropisomers(84281e1e-416b-4d2e-834b-1d215d6767cf).html.

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Atropisomerism is a property exhibited by molecules where rotation about one or more bonds is restricted. Along with biaryls, which are widely utilised in asymmetric catalysis, several other classes of compounds display atropisomerism. These molecules have applications in enantioselective synthesis, asymmetric catalysis and have been used to relay stereochemical information. There are, however, a number of challenges associated with their asymmetric synthesis (Chapter 1). This thesis describes research carried out on the synthesis and asymmetric synthesis of atropisomeric diaryl ethers. Chapte

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3

Feng, Xianqi. "New Syntheses of Diaryl Ethers, Tyrosinols, B-Hydroxytyrosinols, L,L-Isodityrosinol and L,L-Isodityrosine-Derived Agents via the Diels-Alder Reaction." DigitalCommons@USU, 1992. https://digitalcommons.usu.edu/etd/7214.

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Syntheses of diaryl ethers were approached by use of a Diels-Alder reaction employing a new type of diene attached with an aryloxy group. Thus, 2-methyl-3-phenoxybutadiene (90b ), 2- methoxy-3-phenoxybutadiene (92b) and (4S)-3-(t- butyloxycarbony1)-2 ,2-dimethyl-4-( 4-(3-methoxy-1,3 -butadienyl-2- oxy )phenylmethyl]oxazolidine (93b) were synthesized in ~65% yields by methylenation of the carbonyl function in the corresponding 2- substituted acrylate aryl ester using Tebbe's reagent. The 1,3- bis[(trimethylsilyl)oxy ]-2-phenoxybutadiene (105) was made from 1-phenoxy-2-propanone (101) by a seque

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4

Jalalian, Nazli. "Development and Applications of Hypervalent Iodine Compounds : Powerful Arylation and Oxidation Reagents." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-75810.

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The first part of this thesis describes the efficient synthesis of several hypervalent iodine(III) compounds. Electron-rich diaryliodonium salts have been synthesized in a one-pot procedure, employing mCPBA as the oxidant. Both symmetric and unsymmetric diaryliodonium tosylates can be isolated in high yields. An in situ anion exchange also enables the synthesis of previously unobtainable diaryliodonium triflates. A large-scale protocol for the synthesis of a derivative of Koser’s reagent, that is an isolable intermediate in the diaryliodonium tosylate synthesis, is furthermore described. The l

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5

Lee, Jin Kyun. "Heck reaction and diaryl ether synthesis in supercritical carbon dioxide." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615277.

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6

Cox, Robert John. "Ullmann etherification." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/25968.

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Formation of the diaryl ether moiety remains a challenging target for organic synthesis despite modern technologies, however, better understanding of older techniques often leads to improvements. The copper-catalysed Ullmann ether synthesis, whilst attractive in many ways, is frequently problematic due to the inherent irreproducibility of the reaction on scale up. Little is yet known about the mechanism of the reaction and conflicting views are rife within the scientific community. In a well-studied example, we show that the potassium iodide formed during the reaction slows catalysis. Addition

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7

Leone-Stumpf, Danielle. "Synthesis and chromatography of [RuCp] + -labelled diaryl ether peptoids as precursors of the Bastadins from the marine sponge Ianthella basta /." [S.l. : s.n.], 2001. http://www.gbv.de/dms/bs/toc/342079344.pdf.

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8

Leone-Stumpf, Danielle. "Synthesis and chromatography of [RuCp] + -labelled diaryl ether peptoids as precursors of the Bastadins from the marine sponge Ianthella basta." [S.l. : s.n.], 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB9716133.

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9

Waweru, James Kanyoko. "Thermal Properties of Poly(arylene ether)s Prepared from N,N-Dialkyl-2,4-Difluorobenzenesulfonamides." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1471687027.

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10

Adams, Nordette N. "The Diary and Notes of Marcus Christian as a Site of Rhetorical Education, Entries 1924-1945." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/td/2243.

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This thesis asserts that Marcus Bruce Christian (1900-1976), a New Orleans, Louisiana, black poet, writer, and historian, used his diary and notes as a site of rhetorical education and as a space in which he constructed and reinforced a Duboisian ethos, a particular type of black identity and character shaped by the political rhetoric of W. E. B. Du Bois. Maintaining this ethos, Christian, an autodidact throughout most of his life, negotiated a society strangled by white supremacist ideology and resisted being interpellated into the negative black identity constructed by a hostile and stifling

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11

Milton, Edward J. "Pd catalysed C-C & C-O bond formation using bis-(dialkyl/diarylphosphino)ferrocene ligands." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1022.

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A brief introduction explaining phosphine ligand properties, Pd catalysed cross-coupling reactions; the importance of the steps involved in the catalytic cycle (oxidative addition, transmetalation & reductive elimination), mechanistic studies and a comparison of various reactions will give an overview of important cross-coupling reactions and their limitations. The development of a “super-concentrated” (5M) Pd catalysed Kumada type coupling reaction has been developed for coupling a range of aryl bromide and chloride substrates with the Grignard reagents ((p-CF₃-C₆H₄)MgBr)) and PhMgBr in methy

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12

Franquet, Dos Santos Silva Miguel. "Ethics and Photojournalism: the visual representation of reality." Doctoral thesis, Universitat Ramon Llull, 2016. http://hdl.handle.net/10803/362943.

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Inspirats en la filosofia moral de Paul Ricoeur, per qui l'ètica general pot contribuir per qüestionar les conviccions on es basa l'ètica aplicada, aquest estudi pretén identificar i qüestionar els principis ètics fonamentals que han fundat la nostra comprensió del que ha de ser una bona fotografia de premsa des de mitjan segle XIX. És la nostra convicció que la recent controvèrsia sobre el World Press Photo, motivada per la dificultat a establir un criteri clar i consensual que permeti distingir el que és un procediment de postproducció legítim i il·legítim, demostra que el vell paradigma de

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13

Apraiz, Larrucea Itxaso. "Development and application of a proteomic approach to the assessment of pollution in the marine environment." Doctoral thesis, Stockholms universitet, Institutionen för biokemi och biofysik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-26150.

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Today, assessment of the health of coastal waters is recognized as being important for both the conservation of nature and well-being of humans. Anthropogenic pollution has been the focus of extensive research for some time and a variety of programs for the monitoring and assessment of environmental pollution have been developed. Determination of the levels of pollution in sensitive ‘sentinels’ such as mussels, allows monitoring of these levels in a given area over a prolonged period of time. Furthermore, the biological effects of pollution are reflected in a series of biomarkers, none of whic

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14

Andrade, Jakeline Alencar. "Ética docente : estudo sobre o juízo moral do professor." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/15336.

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O presente estudo sobre ética docente consiste na análise descritiva e interpretativa da apropriação do cotidiano escolar através de reflexão e tomada de consciência dos professores sobre o dever ser da profissão e de como esse processo se constitui um instrumento de expansão de si próprio. Destacamos nos estudos da Epistemologia Genética piagetiana a importância da qualidade das relações interpessoais para o desenvolvimento geral do sujeito e, em particular, das tendências heterônomas e autônomas que regem a os juízos e as ações humanas e nos direcionam, através de sucessivas apropriações do

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15

Ghribi, Abdellaziz. "Utilisation des organocuivreux, associés ou non à un acide de lewis, en synthèse asymétrique et dans la préparation des beta-cétophosphonates." Nancy 1, 1986. http://www.theses.fr/1986NAN10059.

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L'action des organocuprates associés à BF::(3) sur des acétals chiraux constitue une voie très originale de synthèse des alcools secondaires optiquement actifs. Les dianons des acides diethylphono 2 alcoiques réagissent avec les aldéhydes par réaction de wittig-horner et conduisent très stéréosélectivement aux acides alpha éthyléniques trisubstitués. L'action des organocuprates sur les chlorures d'acide diethylphosphono-2 alcanoïques, constitue une voie de synthèse très générale des beta cétiogisogibates alpha substitués

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16

Sher, Muhammad [Verfasser]. "Synthesis of functionalized homophthalates, salicylates, diaryl ethers and dihydroisocoumarins based on cyclocondensation reactions of 1,3-Dicarbonyl compounds and 1,3-Bis(silyloxy)-1,3-butadienes / vorgelegt von Muhammad Sher." 2008. http://d-nb.info/991886887/34.

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17

Rayne, Sierra. "Photochemistry of chlorinated and brominated diaryl ether environmental contaminants." 2005. http://hdl.handle.net/1828/654.

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18

Kuo, Ming-Che, and 郭鳴哲. "Synthetic and physical properties studies on nanogold cluster of alkylthiol derived diaryl ether analogues." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/22813657516817296970.

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碩士<br>高雄醫學大學<br>醫藥暨應用化學研究所<br>100<br>Cancer is the main reason which caused people to death, so scientists have been looking for more effective anticancer drugs to fight with cancer cells. Mitosis is an important target for medicinal chemists, and the antimiotic inhibitors suppress the microtubules in cell division of metaphase to achieve anticancer effects. Diaryl ether scaffolds are noted by scientists in recent years. The pre-clinical models have demonstrated that diaryl ether compounds elicit outstanding anticancer activity. The purpose of this study is to modify the diaryl ether derivativ

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19

Chiang-Yung-Sheng and 江湧聖. "The study in the sysnthesis of calix[4]arene 1,2 dialkyl ethers." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/88290393686100889438.

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碩士<br>中國文化大學<br>應用化學研究所<br>96<br>Calixarenes, which are cyclic oligomers of p-substituted phenols and formaldehyde, are able to include small organic molecules or metal ions within the molecular cavities to form ‘‘ host-guest ’’ complexes. These phenomena have been proposed in the applications of micro- analysis, ion separation, and enzyme-mimic studies. The main purpose of this thesis is to study the synthesis of calix[4]arene 1,2-dialkyl ethers. In the presence of a base, p-tert-butylphenol and formaldehyde were polymerized to form a yellowish precursor. Refluxing of this precursor in diph

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20

Tsai, You-Shu, and 蔡佑書. "Recycling of PC Waste to Bisphenol A Diallyl Ether." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/75535728790552726471.

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碩士<br>國立中興大學<br>化學工程學系所<br>98<br>In this research, a unique and efficient process for chemical recycling of spent polycarbonate (PC) into bisphenol-A diallylether (BPA-DAE) has been developed. We started our research by working on the conditions of converting phenol and diphenyl carbonate (DPC) individually into allyl phenyl ether (APE) by a palladium catalyzed etheration process with allyl carbonates as our non-halogen reagents. In the model study, we confirmed that phenol could be easily converted into allyl phenyl ether (APE) under mild condition (85 oC) with either mono-allyl carbonates, d

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21

Leone-Stumpf, Danielle. "Synthesis and chromatography of [RuCp]+-labelled diaryl ether peptoids as precursors of the bastadins from the marine sponge lanthella basta /." 2001. http://www.gbv.de/dms/bs/toc/342079344.pdf.

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22

Leone-Stumpf, Danielle [Verfasser]. "Synthesis and chromatography of [RuCp]+-labelled diaryl ether peptoids as precursors of the bastadins from the marine sponge Ianthella basta / presented by Danielle Leone-Stumpf." 2001. http://d-nb.info/963624113/34.

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23

SHEN, BING-XIU, and 沈炳修. "Effects of bromine-containing flame retardants on the flame retardancy and mechanical properties of plastics:the comparison of tetrabromobisphenol a diallyl ether and tetrabromobisphenol a." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/04500095840369495496.

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24

Hinrichs, Stefan. "Messung und Modellierung der Initiatoreffektivität organischer Peroxide in der Ethen-Hochdruckpolymerisation." Doctoral thesis, 2005. http://hdl.handle.net/11858/00-1735-0000-0006-B0D2-E.

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25

Cusson, Jean-Philippe. "Étude de la cyclisation de lactones à 9 membres par réaction de métathèse et formation catalytique de liens benzyliques asymétriques." Thèse, 2017. http://hdl.handle.net/1866/19342.

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Préalablement, une synthèse de l’aliskiren, un inhibiteur de la rénine développé pour le traitement de l’hypertension, a été réalisée auprès du groupe Hanessian. Durant cette synthèse, une réaction clé de cyclisation par métathèse, menant à la formation de lactone à neuf membres, a été réalisée. Durant cette réaction, nous avons observé une différence de réactivité entre les diastéréomères, menant à la formation de monolactones et de dilactones, générant ainsi de l’intérêt pour l’étude des facteurs en cause. Le présent mémoire rapporte et détaille les résultats de cette analyse quant à la form

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26

Burlea, Suzana Raluca. "Encountering the suffering other in illness narratives : between the memory of suffering and the suffering memory." Thèse, 2009. http://hdl.handle.net/1866/4519.

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Cette étude porte sur la dimension intersubjective de la souffrance qui affecte le rapport du souffrant à son corps, au temps et à l’espace vécus de même que son identité narrative et sa mémoire narrative. Mon argument principal est que la voix narrative constitue le rapport intersubjectif dans les récits de maladie que les proches écrivent sur leurs partenaires souffrant de cancer de cerveau ou de la maladie d’Alzheimer. Ma discussion est basée sur l’éthique, la phénoménologie, les théories de l’incorporation, les études des récits de vie, la sociologie et l’anthropologie médicales et la narr

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