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Dissertations / Theses on the topic 'Thiophenes. Organic cyclic compounds'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Haughan, Alan F. "Novel synthetic methods for preparation of cyclic compounds." Thesis, University of Bristol, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333955.

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2

Dixon, John Mark. "The conformational analysis of cyclic compounds by NMR spectroscopy." Thesis, University of Nottingham, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293631.

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3

Khedhair, K. A. "The conformational analysis of cyclic compounds by spectroscopic methods." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353919.

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4

Haq, Ahsanul. "The preparation of macrocyclic compounds by thermolysis of cyclic peroxides." Thesis, Heriot-Watt University, 1992. http://hdl.handle.net/10399/1491.

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5

Shirtcliff, Laura Donnell. "'Coarctate' cyclizations : applications to heterocycle synthesis /." view abstract or download file of text, 2006. http://proquest.umi.com/pqdweb?did=1188876631&sid=1&Fmt=2&clientId=11238&RQT=309&VName=PQD.

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Thesis (Ph. D.)--University of Oregon, 2006.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 336-357). Also available for download via the World Wide Web; free to University of Oregon users.

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6

Contla, Hector Luna. "Cis-arenediols as versatile chiral synthons in the synthesis of prostaglandins, cyclitols, carbohydrates, and alkaloids /." This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-07282008-134713/.

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7

Lo, Kai-yip, and 羅啟業. "Synthesis of aza-bicyclic compounds via palladium-catalyzed cascade cyclization reactions." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B47849691.

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A palladium-catalyzed oxidative cascade cyclization reaction has been developed to prepare pyrrolizidine and indolizidine derivatives from simple aliphatic alkenyl amides 2.1ak in one step in moderate to good yields, using Pd(TFA)2 as the catalyst and molecular oxygen (1 atm) as a green oxidant. This cascade cyclization can also proceed for ring-containing unsaturated amides 2.1ln to afford azatricyclic systems. Palladium(II)-catalyzed dehydrohalogenation cascade cyclization reactions have been developed to synthesize polycyclic pyrrolizidine derivatives from iodoalkenylanilides 4.1ai

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8

Khumtaveeporn, Kanjai. "Rhodium catalyzed carbonylation and related reactions of nitrogen-, sulfur- and oxygen-containing cyclic and acyclic compounds." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/10375.

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A systematic investigation has been carried out on the rhodium(I) catalyzed carbonylation of heterocyclic and acyclic compounds containing two heteroatoms at the 1,3-positions. The regioselectivities of carbon monoxide insertion are different in cyclic and acyclic compounds. When there is a choice between C-S and C-N bonds, in acyclic compounds, carbonylation of the C-N bond is more facile and the C-S bond is more easily carbonylated in acyclic compounds. When there is a possibility of ring or side chain carbonylation, it appears that the C-X bond of the side chain is more reactive. Rhodium(I)

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9

Chu, Suk-ling. "The first synthesis and structure of diazatetrathiafulvalenes and some spectroscopic and cyclic voltammetric measurements /." [Hong Kong : University of Hong Kong], 1993. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13544548.

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10

Sutivisedsak, Nongnuch. "Synthesis of [alpha]-hydroxy and fluoro phosphonates and cyclic ether-containing natural products." Diss., St. Louis, Mo. : University of Missouri--St. Louis, 2008. http://etd.umsl.edu/r3246.

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11

Wieczysty, Martin David. "C-H functionalisation of 2-aryl cyclic 1,3-dicarbonyl compounds ; Enantioselective Rh(I)-catalysed cyclisation of arylboron compounds onto ketones." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/18741.

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1. C–H Functionalisation of 2 Aryl Cyclic 1,3-Dicarbonyl Compounds Two enolate-directed C–H functionalisation protocols have been developed using 2-aryl cyclic 1,3-dicarbonyl compounds as substrates. Reactions with activated alkenes, under ruthenium or palladium catalysis produced benzopyrans in most cases, in moderate to good yield. Alternatively, an oxidative annulation of 2-aryl cyclic 1.3-dicarbonyls with 1,3-enynes was facilitated under rhodium catalysis, forming functionalised spiroindene structures in most cases, in generally good yields and high regioselectivity. During the investigati

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12

朱淑玲 and Suk-ling Chu. "The first synthesis and structure of diazatetrathiafulvalenes and somespectroscopic and cyclic voltammetric measurements." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1993. http://hub.hku.hk/bib/B31211392.

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13

Altun, Yasemin. "Addition Of Carbonyl Compounds To The Cyclic Olefins: Synthesis Of Cyclitols." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12610117/index.pdf.

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ABSTRACT ADDITION OF CARBONYL COMPOUNDS TO THE CYCLIC OLEFINS: SYNTHESIS OF CYCLITOLS Altun, Yasemin M.S., Department of Chemistry Supervisor: Prof. Dr. Metin Balci October 2008, 160 pages Cyclitols have attracted a great deal of attention in recent years owing to biological activities exhibited by them and also their usefulness in the synthesis of other natural products and pharmaceuticals. Carbasugars are also a derivative of cyclitols and they are cyclic monosaccharide analogues which posses &amp<br>#8211<br>CH2OH group in their structure. In this study, novel synthetic strategies

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14

Owino, Norbert Oduor. "Development of synthetic methods for the preparation of cyclobutenes and glycopeptides." Diss., Online access via UMI:, 2004. http://wwwlib.umi.com/dissertations/fullcit/3150497.

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15

Cadou, Romain F. "Studies in cyclic ether synthesis : Part one: Domino cyclisations to cyclic ethers -- Part two: Synthetic studies towards neopeltolide." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1025.

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Tetrahydrofuran (THF) and tetrahydropyran (THP) rings are commonly found in a wide range of natural products and biologically active compounds. In total synthesis, the formation of THF/THP motifs is often the key step but existing methods often involve numerous steps and low overall efficiencies. Part one of this thesis details the development of a practical method for the synthesis of THF rings by the controlled mono-addition/cyclisation of organolithium species to C2-symmetric diepoxides (Scheme A-1). This method can also be applied to the synthesis of bis-THF rings from triepoxides and has

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16

Hess, Euodia. "Boron-doped Diamond Sensors for the Determination of Organic Compounds in Aqueous Media." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5310_1305022937.

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<p>In electrochemical oxidation treatment of wastewater, the electrode material is an important parameter in optimizing oxidative electrochemical processes, since the mechanism and products of several anodic reactions are known to depend on the anode material. The electrochemical oxidation of benzaldehyde, nitrobenzene and m-cresol on bare boron-doped diamond (BDD) electrode was investigated. Cytochrome c was then electrochemically immobilsed onto the functionalized BDD electrode by cyclic voltammetry. Oxidation and reduction reaction mechanism of each flavonoid was studied. There was one oxid

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17

Contla, Hector Luna. "cis-Arenediols as versatile chiral synthons in the synthesis of prostaglandins, cyclitols, carbohydrates, and alkaloids." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/38900.

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18

Pereira, Fernando Luiz Cardoso. "Aplicações sintéticas de β-enamino ésteres." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/46/46135/tde-19112015-162222/.

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Uma série de β-enamino ésteres foi submetida a reações de iodociclização ou lactonização mediada por iodo, fornecendo como produtos iodo-β-enamino ésteres cíclicos ou β-enamino lactonas, respectivamente. Os iodo-β-enamino ésteres cíclicos obtidos foram submetidos a reações de desidroiodação, fornecendo os correspondentes produtos de eliminação de HI a partir de iodociclos de cinco membros, e ciclopentanos trissubstituídos, a partir de anéis de seis membros. Esta última reação ocorreu por substituição nucleofílica intramolecular, em vez da esperada reação de desidroiodação.

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19

Bohlin, Pernilla. "Passive sampling of PAHs and some trace organic compounds in occupational and residential air : needs, evaluation and limits /." Göteborg : Institute of Medicine at Sahlgrenska Academy, University of Gothenburg, 2010. http://hdl.handle.net/2077/2.

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20

McKim, Artie S. "Synthesis and Alkali Metal Extraction Properties of Novel Cage-Functionalized Crown Coronands and Cryptands." Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc277666/.

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21

Chen, Haoguo, and 陳浩國. "Silver catalyzed enyne cyclization reactions." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42841409.

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22

Chen, Haoguo. "Silver catalyzed enyne cyclization reactions." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B42841409.

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23

Jenart, Maud. "Synthèse d'oligo- et polythiophènes pontés pour augmenter la dimensionnalité du transport de charges." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209218.

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Un nouveau domaine de recherche a vu le jour à la fin du XXe siècle, celui de l’électronique organique provenant de l’union des propriétés de l’électronique avec celles des matériaux semiconducteurs organiques. Les principaux avantages technologiques des matériaux organiques proviennent de leur facilité de mise en œuvre (par exemple :l’impression à pression et température ambiantes) et de leur flexibilité mécanique en comparaison au silicium qui est le matériau semiconducteur le plus utilisé au monde. En raison de ces avantages, de nombreuses perspectives d’applications ont été envisagées tell

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24

Teoh, Euneace Ching Mei. "Synthesis of amino acids by metal-catalysed reactions." Monash University, School of Chemistry, 2004. http://arrow.monash.edu.au/hdl/1959.1/9633.

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25

Nunes, Marta Regina dos Santos. "Ciclização eletrofílica de compostos β-enamino carbonílicos e β-dicarbonílicos." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/46/46135/tde-18092018-160100/.

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Esta tese consiste do estudo de reações de ciclofuncionalização de compostos β-enamino carbonílicos e β-dicarbonílicos, contendo uma cadeia alquenílica nas posições α ou γ. Os eletrófilos empregados para este fim foram: iodo, brometo de fenilselenenila e tricloreto de p-metóxifeniltelurio. Os iodo-β-enamino ésteres e cetonas cíclicas, após desidroiodação mediada por base, levaram à formação dos correspondentes pirróis, indóis e aminobenzofuranos. A ciclização dos β-ceto ésteres e β-dicetonas levou a enol éteres e benzofuranos funcionalizados. Estes resultados

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26

Planas, i. Grabuleda Marta. "Síntesi de 1-oxaspiro [4.4]nonans polifuncionalitzats i (+-)-andirolactona." Doctoral thesis, Universitat de Girona, 1996. http://hdl.handle.net/10803/96652.

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Spiro-γ-lactones are widely distributed among natural products, several of them being well known by their interesting biological activities. We describe herein the synthesis of 1-oxaspiro[4.4]nonan derivatives and (+-)-andirolactone starting from easily available Diels-Alder adducts of 5-methylene-2(5H)-furanome 1 and classical dianes<br>La química de les espiro-γ-lactones ha despertat un considerable interès principalment degut a què moltes molècules que posseeixen aquesta estructura presenten diverses i significatives activitats biològiques. En aquesta tesi doctoral, prenent com a precursors

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27

Aybey, Asuman. "Synthesis Of Chiral Lactones Via The Baeyer Villiger Oxidation Of Cyclic Aromatic Acetoxy Ketones Novel Annulation Reactions Of 2-propynyl-1,3-dicarbonyl Compounds To Form Pyrroles Addition Of Acyl Phosphonates To Diethyl Cyanophosphonate (depc)." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12610293/index.pdf.

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Chiral Baeyer-Villiger (BV) oxidation of cyclic ketones allows rapid access to asymmetric lactones as valuable intermediates in organic chemistry and frequently encountered precursors in enantioselective synthesis. In the first part, BV oxidation of functionalized ketones, especially cyclic &amp<br>#61537<br>-hydroxy and acetoxy ketones is described which could be a straightforward route to the &amp<br>#61537<br>-hydroxy lactones and &amp<br>#61537<br>-hydroxyalkanoic acid derivatives. The &amp<br>#61537<br>-acetoxylation of indanone, tetralone and chromanone derivatives by using Mn(OAc)3 fol

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28

Bedioui, Fethi. "Etude électrochimique de complexes de métaux de transition (bases de Schiff et porphyrines) en solution et sous forme d'électrodes modifiées : application à la catalyse électroassistée de réactions organiques." Paris 6, 1986. http://www.theses.fr/1986PA066338.

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Les propriétés électrochimiques des complexes co-base de Schiff (phenylene-bis(salicylideneiminoto)-co, ou Co(II)saloph, et n-methylenepropylene-bis-(salicylideneiminoto)-co, ou co-selnmedpt) et de tetraphenylporphine-co, ou CoTPP, sont utilisées pour étudier la réduction électroassistée d'halogénures organiques, Rx, avec un catalyseur fixe sur support conducteur, en milieu organique. On étudie: 1) la réduction du chlorure de benzyle électrocatalysée par des électrodes de graphite modifiées par du co-saloph et 2) l'oxydation par l'oxygène moléculaire du di-tert-butylphenol, électrocatalysée pa

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29

Soules, Régis. "Proprietes cooperatives de complexes polymetalliques des ligands squarate et thiosquarate." Toulouse 3, 1987. http://www.theses.fr/1987TOU30178.

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Etude de l'emploi d'un coordinat assembleur qui puisse par coordination avec le centre metallique utilise (metaux de transition du groupe viii) aboutir a un agencement a une dimension des motifs moleculaires par empilement d'entites monomeres ou par formation de chaines. Par utilisation du coordinat squarate sous ses formes oxygenees et soufrees, obtention d'un certain nombre de complexes de pt, pd, ni et cu repondant aux criteres fixes. Etude des structures de ces composes, de leurs proprietes physiques et de la relation structure-propriete. La nature du coordinat comme le caractere specifiqu

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30

Turkman, Nashaat. "Synthesis and study of fluorinated thiophenes, bithiophenes and trithiophenes Models for the polymeric material/." 2008. http://hdl.handle.net/10106/1823.

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31

Zheng, Tao. "Stereoselective construction of cyclic ether rings via cyclic orthoesters and kinetic resolution of racemic alkenes by asymmetric dihydroxylation using peptide-based ligands." Diss., 2006.

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32

Albasheer, Mohamed Saadaldin Altaib. "Synthesis of polycyclic hydantoin derivitaves and peptides." Thesis, 2008. http://hdl.handle.net/10413/473.

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Cyclic cage compounds have attracted much attention in pharmaceutical studies. The lipophilic nature of these compounds plays an important role in facilitating the crossing of the cellular membranes, including the blood brain barrier (BBB) and the central nervous system (CNS). Several adamantane and pentacyclo[5.4.0.02,6.03,10.05,9]undecane (PCU) derivatives have shown great potential as antiviral, antibacterial and neuroprotective compounds. The aim of this study includes the synthesis of hydantoin derivatives of adamantane and PCU as anticonvulsant compounds. Fosphentoin sodium (Cerebyx) 48

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33

Olson, Julie Ann. "Development of a tandem Diels-Alder/Pauson-Khand strategy for synthesis of tetracycles." 2010. http://hdl.handle.net/10090/15180.

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34

Hlungwani, Isaac. "Design, synthesis and biological evaluation of novel tetrasubstituted quinoline-3-carboxamides derivatives." Diss., 2020. http://hdl.handle.net/11602/1558.

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MSc (Chemistry)<br>Department of Chemistry<br>Quinolines are well known naturally occurring heterocyclic compounds with nitrogen as a heteroatom. Quinolines are also one of the major classes of naturally occurring compounds and the interest in their chemistry is due to the wide range of their biological activities. The objective of the project was the synthesis of novel tetra-substituted quinoline-3carboxamides and subsequent transformation to other novel derivatives and evaluation of their biological activities against malaria and cytotoxicity. In achieving the objective, 2-chloroquinoline-

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35

Song, Eunho Krafft Marie E. "Ring-closing metathesis for the synthesis of carbocyclic and heterocyclic intramolecular Baylis-Hillman adducts." Diss., 2005. http://etd.lib.fsu.edu/theses/available/etd-05062005-172529.

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Thesis (M.S.)--Florida State University, 2005.<br>Advisor: Dr. Marie E. Krafft, Florida State University, College of Arts and Sciences, Dept. of Chemistry and Biochemistry. Title and description from dissertation home page (viewed Sept. 19, 2005). Document formatted into pages; contains 147 pages. Includes bibliographical references.

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36

MARSCHKE, GREGOR ERWIN J. "PART I. PHOTOCHEMISTRY OF 1-AZOADAMANTANE: REACTIONS OF 1-ADAMANTYL RADICALS IN VARIOUS SOLVENTS. PART II. THE QUEST FOR THE CARBON-CENTERED BETA-AZO RADICAL VIA HOMOLYSIS OF ACYCLIC AND CYCLIC AZO COMPOUNDS." Thesis, 1987. http://hdl.handle.net/1911/16093.

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Part I. The tritium isotope effect for hydrogen atom abstraction by the 1-adamantyl radical in cyclohexane was determined to be 103, confirming the exceptionally large deuterium isotope effect found earlier for this process. While the Noyes model accounts for the cage effect in the thermolysis of cis -1-azoadamantane, the non-linear correlation between the yield of cage dimer and solvent fluidity at high viscosities suggests that microviscosity influences the breakdown of the solvent cage. In acetonitrile, 1-adamantyl radicals were found to abstract hydrogen atoms or to add to the nitrile func

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37

Ramonetha, Thata Golden. "Synthetic and spectroscopic studies of 6-substituted chromone derivatives." Diss., 2015. http://hdl.handle.net/11602/772.

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38

Gordon, Allen Tauya. "Synthetic studies and biological evaluation of chromone - 3 - carbaldehydes." Diss., 2018. http://hdl.handle.net/11602/1214.

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MSc (Chemistry)<br>Department of Chemistry<br>Chromones are well known naturally occurring heterocyclic compounds with oxygen as a heteroatom. Chromones are also one of the major classes of naturally occurring compounds, and the interest in their chemistry is due to their wide range of their biological activity. In this study, three classes of target compounds were synthesized through three different pathways. The first pathway, chromone-3-carbaldehyde analogues were afforded in good to excellent yield followed by the oxidation thereof to 4-oxo-4H-chromene-3-carboxylic acids. A series of chro

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39

Lewis, Shanta. "Effects of carbon nanotubes on barrier epithelial cells via effects on lipid bilayers." Thesis, 2013. http://hdl.handle.net/1805/5611.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Carbon nanotubes (CNTs) are one of the most common nanoparticles (NP) found in workplace air. Therefore, there is a strong chance that these NP will enter the human body. They have similar physical properties to asbestos, a known toxic material, yet there is limited evidence showing that CNTs may be hazardous to human barrier epithelia. In previous studies done in our laboratory, the effects of CNTs on the barrier function in the human airway epithelial cell line (Calu-3) were measured. Measurements were done using electrophysiology,

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