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Dissertations / Theses on the topic 'Synthesis. heterocyclic compounds'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Wilson, Jennifer M. "Synthesis of biologically active heterocyclic compounds." Thesis, University of Glasgow, 2007. http://theses.gla.ac.uk/45/.

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More than 11 million people worldwide are diagnosed with cancer every year. New cancer drugs are required that are more effective and selective. Nitrogen mustard alkylating agents crosslink DNA inhibiting transcription and replication. Use of the mustard pharmacophore as part of a macrocycle allows metal complexation and produces a prodrug. Hypoxic tumour cells have increased concentrations of reductase enzymes which could lead to reduction of the complex in situ and release of a cytotoxic drug. Human African Trypanosomiasis is commonly known as Sleeping Sickness and affects over 36 countries

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2

Jamalis, Joazaizulfazli. "Synthesis of heterocyclic containing oxygen compounds." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.529847.

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3

Emans, John. "Synthesis of novel heterocyclic polymers." Thesis, University of St Andrews, 1987. http://hdl.handle.net/10023/15299.

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This work details the synthesis, characterisation and fabrication of a range of copolyesters, containing various angular disrupters, especially disubstituted 2,5-diphenyl- -1,3,4-oxadiazoles. These disrupters were incorporated into the polymers, to reduce the temperature at which the polymers may be processed, to enable their fabrication into fibres. The majority of the polymers prepared were found to be liquid crystalline. However, if the angular disrupter content of the polymer was high, it was found that the resultant polymers were non-liquid crystalline. The polymers were prepared by a mel

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4

李安怡 and On-yi Lee. "Synthesis of heterocycles via phenylseleno group transfer radical cyclization and chemoselective reductive amination promoted by InCl3." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B3955756X.

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5

Leu, Chao-Wei Chemistry Faculty of Science UNSW. "Synthesis of heterocyclic analogues of phytoestrogens." Publisher:University of New South Wales. Chemistry, 2008. http://handle.unsw.edu.au/1959.4/40824.

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The pyrrolo[3,2,1-ij]quinolin-6-one ring system was synthesised from 3-aryl-4,6-dimethoxyindoles and 2,3-disubstituted-4,6-dimethoxyindoles. The reaction of 4,6-dimethoxyindoles under Friedel-Crafts or Vilsmeier-Haack acylation gave the 2- and 7-indolyldeoxybenzoins in good yield. Cyclisation of 7-indolyldeoxybenzoins with N,N-dimethylformamide dimethyl acetal as a one carbon reagent gave the pyrroloquinolin-6-ones in high yield. Reduction of pyrroloquinolin-6-ones with hydrogen gas and 10% palladium on carbon or lithium aluminium hydride yielded the dihydropyrroloquinolin-6-ones. Demethylatio

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6

Burnett, Duane Arthur. "Synthesis of nitrogen containing heterocycles /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487264603219377.

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7

Stewart, Lesley Ann. "Synthesis of heterocyclic compounds as potential anticancer agents." Thesis, University of Glasgow, 1996. http://theses.gla.ac.uk/4936/.

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8

Taher, Abutariq. "Novel cyclisations of nitro-compounds for heterocyclic synthesis." Thesis, Loughborough University, 2001. https://dspace.lboro.ac.uk/2134/34705.

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The research described in this thesis is aimed at developing novel methods of synthesis for heterocyclic compounds, in particular cyclisation reactions involving the nitro functional group. The first chapter describes investigations into the Wallach imidazole synthesis. A number of chloroimidazoles were prepared, but the possible extension to highly functionalised imidazoles proved elusive. The second chapter describes studies on the successful conversion of nitroimidazolyl malonates 1 into imidazo[4,5-c]isoxazoles 2, Scheme 1. Related cyclisations are described in chapter three and the thioph

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9

Khan, Musharraf Naveed. "Synthesis of different heterocyclic compounds of pharmaceutical relevance." Thesis, University of Huddersfield, 2013. http://eprints.hud.ac.uk/id/eprint/19503/.

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This thesis describes the synthesis of different cyclic imines and the exploration of their reactivity with cyclopropenones and 1,3-dipoles,as well as an investigation of the chemistry of the products. The synthesis of biologically and pharmaceutically important heterocyclic natural product analogues, such as the pyrroloazepines, indolizidines and pyrrolizidines has been achieved using a cycloaddition reaction between cyclic imidates and cyclopropenones. A new route to pyridines has been developed using the generation of a proposed 3-azacyclopentadienone as the key step. The 3-azacyclopentadie

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10

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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11

Cai, Chunming. "Microwave mediated synthesis of nitrogen- and/or oxygen-containing compounds." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013762.

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12

Lee, On-yi. "Synthesis of heterocycles via phenylseleno group transfer radical cyclization and chemoselective reductive amination promoted by InCl3." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B3955756X.

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13

Trippier, Paul Charles. "Synthesis of highly substituted heterocycles : the oxazolomycins." Thesis, University of Oxford, 2006. http://ora.ox.ac.uk/objects/uuid:b758987c-7a0c-4c1b-982c-61b4d383680a.

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This thesis is concerned with studies towards the total synthesis of a class of natural products - the oxazolomycins. Attention was focused on the left-hand side triene fragment and right-hand side lactam heterocyclic system. This thesis describes the synthesis of a racemic terminal phenyl analogue of oxazolomycin A and C, possessing the left-hand side triene geometry as required. A novel truncated pyridine analogue is also described. The molecules represent a racemic total synthesis of analogues of phthoxazolin A and inthomycins B and C. The synthesis is based upon a crucial Stille cross-coup

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14

Langgaard, Kristensen Jesper. "Metalation, halogen-metal exchange and Pd(0) catalyzed cross-coupling reactions : application to the synthesis of substituted aromatic and heteroaromatic systems /." [Cph.] : Department of Medicinal Chemistry, Royal Danish School of Pharmacy, 2001. http://www.dfh.dk/phd/defences/previous2002.htm.

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15

Nocanda, Xolani Wittleton. "Applications of Baylis-Idllman methodology in the synthesis of chromene derivatives." Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1018257.

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The reaction of salicylaldehyde with various activated alkenes, viz., methyl vinyl ketone, ethyl vinyl ketone, phenyl vinyl sulfone, phenyl vinylsulfonate, acrolein and acrylonitrile, under Baylis-Hillman conditions, has been found to proceed with the chemoselective formation of chromene derivatives. The reaction conditions have been optimised and chromene derivatives have been obtained in isolated yields up to 87 %. The generality of the reaction, using 1,4-diazabicyclo[2.2.2]octane (DABCO), as the catalyst, and a heterogeneous (chloroform-water) solvent system, has been established using a r

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16

Hussain, Amjad. "The synthesis of heterocyclic compounds related to natural products." Thesis, Swansea University, 2001. https://cronfa.swan.ac.uk/Record/cronfa43039.

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The thesis relates to the synthesis of heterocyclic compounds related to Natural Products. Chapter 1 deals with an introduction to hypervalent iodine reagents and their uses as phenolic oxidation reagents. The mechanism is also discussed. Chapter 2 concentrates on the production of 3-substituted phenols and the subsequent hypervalent iodine oxidation to see if a variety of chromenone compounds can be formed via intramolecular attack. Whilst not successful in generating the desired compounds, a number of oxidised products were isolated. Chapter 3 deals with making the 3-nucleophilic side chain

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17

Peters, Jennifer Margaret 1956. "Synthesis and monoamine uptake inhibiting properties of perisubstituted tricyclic compounds." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/291828.

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The synthesis of 1-methyl-promazine, 4-hydroxymethyl-iminodibenzyl, and 4-bromo-5-trimethylsilyl-iminodibenzyl via dilithiation and ¹H-NMR's are described. Molecular modeling was done for the latter compound. The heat of dissociation was 30.6 kcal/mole for the lowest energy conformer. Rotational energies were examined for three bonds. The IC₅₀ values for inhibition of neurotransmitter uptake by rat brain synaptosomes were determined for a series of 1-substituted promazines, and 4-substituted imipramines. 1-Substituted promazines were fair inhibitors of serotonin uptake with an average IC₅₀ of

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18

Duan, Gongping. "Design, synthesis, and photophysics and photochromic study of dithienylethene-containing heterocyclic derivatives and N-heterocyclic carbene-ruthenium (II) complexes." Click to view the E-thesis via HKUTO, 2010. http://sunzi.lib.hku.hk/hkuto/record/B44248246.

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19

Zinser, Caroline Magdalene. "Palladium and gold N-heterocyclic carbene complexes : synthesis and catalytic applications." Thesis, University of St Andrews, 2019. http://hdl.handle.net/10023/17066.

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20

Orton, Edward. "Synthesis and chemistry of 4,5-dimethylene-1,3-dioxolan-2-one and related compounds /." Thesis, Connect to this title online; UW restricted, 1985. http://hdl.handle.net/1773/8620.

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21

Du, Wei, and 杜玮. "Palladium-catalyzed oxidative cascade cyclizations via C-N/C-C formation for synthesis of nitrogen heterocycles." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206320.

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22

Illesinghe, Jayamini P. M. "Synthesis and use of nitrogen heterocycles in metal mediated reactions." Monash University, School of Chemistry, 2004. http://arrow.monash.edu.au/hdl/1959.1/9637.

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23

Somphol, Kittiya Chemistry Faculty of Science UNSW. "Synthesis of new heterocyclic structures based on indoles." Awarded by:University of New South Wales. Chemistry, 2007. http://handle.unsw.edu.au/1959.4/40829.

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Novel indolo-macrocycles have been generated from the attempts to synthesise bis-indolo-cyclotriveratrylenes by the condensation of I, I'-diindolyl-3,3'-dimethanols catalysed by p-toluenesulfonic acid. The addition of substituents on indoles led to enhanced solubilities of the macrocycles. Nine- and six-membered ring compounds have been synthesized from the acid-catalysed reaction of I,I'-diindolyl compounds and aryl aldehydes. Some reactions of these compounds and the attempted synthesis of 2,2' diindolylmethanes from the cyclic compounds have also been described. The electrophilic substitu

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24

Rogers, James William. "1-benzotriazolyl-2-propynones as novel 1,3-biselectrophiles, benzotriazole-assisted thioacylation and synthesis of energetic materials." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013389.

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25

Allott, Keith. "The oxidative elimination and ring expansion expansions of heterocyclic nitromethyl compounds." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329598.

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26

Grisle, Roger Anthony. "Synthesis of novel heterocyclic difluoro monomers via the chemistry of reissert compounds." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05042010-020216/.

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27

Björk, Malin. "Synthesis of sulfur and seleniumn heterocycles, including derivatives of imidazopyridine and benzimidazole /." Stockholm, 2005. http://diss.kib.ki.se/2005/91-7140-597-6/.

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28

Yuen, Yue Tai. "Trithiazyl trichloride in the synthesis of sulfur-nitrogen heterocyclic compounds." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362732.

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29

Roxburgh, C. J. "The synthesis of heterocyclic compounds from Indan-1, 3-diones." Thesis, University of Portsmouth, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234430.

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ABSTRACT 2-Phenyl-indan-1,3-dione reacts via a Michael addition with 2-vinylpyridine to yield 2-phenyl-2-(2-(2-pyridyl) ethyl) indan- 1,3-dione, which on catalytic hydrogenation of the pyridine ring yields, via a ring cyclization/expansion reaction, rel(12S,14aR) 12- phenyl-1~3,4,12,13,14,l4a-octahydropyrido[l,2-£] [2]benzazonin- 6,ll-dione. A lithium aluminium hydride reduction of rel(12S,14aR) 12- phenyl-l,2,3,4,12,l3,14,14a-octahydropyrido[l,2-£] [2]benzazonin- 6,ll-dione yielded rel(llS,12S,l4aR) ll-hydroxy l2-phenyl-substituted derivative as the only isomer~ Various derivatives of this sy

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30

Abid, Huda Ahmed. "Investigations into the synthesis of heterocyclic compounds with biological applications." Thesis, Keele University, 2018. http://eprints.keele.ac.uk/5438/.

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There is a growing body of literature that recognises the importance of tandem reactions, where a number of transformations are carried out in a one-pot process. Such reactions offer considerable benefits such as: a reduction in time, and the sequence of synthetic processes that subsequently improve in efficiency. Particularly useful is the one-pot cascade of transforming alcohols to alkenes using an Oxidation-Wittig sequence. Although, the Wittig reaction is a dominant and powerful olefination method, sometimes the isolation of, instability of, toxicity of, or volatility of the carbonyl compo

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31

Shukla, Rajesh 1964. "Experimental and Theoretical Studies of Polycarbocyclic Compounds." Thesis, University of North Texas, 1998. https://digital.library.unt.edu/ark:/67531/metadc279238/.

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Part I. Diels-Alder cycloadditions of 1,2,3,4,9,9-hexachloro-1α,4α,4aα,8aβ-tetrahydro-l,4-methanonaphthalene (32) and 1,2,3,4,9,9-hexachloro-lα,4α,6,7- tetrahydro-l,4-methanonaphthalene (33) to 4-methyl- and 4-phenyl-l,2,4-triazoline-3,5-dione [MTAD and PTAD, respectively] and to N-methylmaleimide (NMM) have been studied. The structures of several of the resulting cycloadducts were determined by X-ray crystallographic methods. The observed stereoselectivity of each of these Diels-Alder reactions was further investigated via application of theoretical methods. Thus, semiempirical (AMI) and ab i

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32

Hunter, Gordon A. "Synthesis and properties of 3-hydroxypyrroles, 3-hydroxythiophenes, and related compounds." Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/15064.

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33

Duan, Gongping, and 段公平. "Design, synthesis, and photophysics and photochromic study of dithienylethene-containing heterocyclic derivatives and N-heterocycliccarbene-ruthenium (II) complexes." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44248246.

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34

Hung, Faan-fung, and 孔繁峰. "Luminescent platinum(II), palladium(II) and gold(III) complexes containing isocyanide, alkynyl and N-heterocyclic carbene ligands : synthesis, photophysical properties and material applications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206318.

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35

Kimball, David Brian. "(Alkynylphenyl)triazenes and phenylacetylene macrocycles for the synthesis of heterocycles and aromaticity probes /." view abstract or download file of text, 2002. http://wwwlib.umi.com/cr/uoregon/fullcit?p3055694.

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Thesis (Ph. D.)--University of Oregon, 2002.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 249-278). Also available for download via the World Wide Web; free to University of Oregon users.

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36

Zhou, Jiamin, and University of Lethbridge Faculty of Arts and Science. "Synthesis of 1-chloro-1,2,4,6-selenatriazines and some products of reduction." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2005, 2005. http://hdl.handle.net/10133/295.

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A general route to 1-chloro-1,2,4,6-selenatriazines with substuents on 3,5 positions has been developed by the reactions of N-imidoylamidines with selenium tetrachloride. The mechanism for these reactions is discussed according to the observed intermediates. At least two intermediates exist. One of the intermediates, 1,1-dichloro-3-trichloromethyl-4H-5-diisopropylphenyl-1,2,4,6-selenatriazine, was identified by 1HNMR, Mass spectroscopy and X-ray crystallography. 1-Chloro-1,2,4,6-selenatriazines were synthesized in high yield and fully characterized. Five 1-chloro-1,2,4,6-selenatriazine crystal

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37

Kleinhans, Dewald Johannes. "Studies in the synthesis of benzoxazole compounds." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97900.

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Thesis (PhD)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Benzoxazoles are an important class of π-electron-excessive, benzene-fused heterocyclic compounds found in natural products and display a wide range of pharmacological applications. It is therefore a widely used starting scaffold for drug and agrochemical discovery programs. Other applications include: chiral auxiliaries in asymmetric reactions, chiral receptors for the resolution of racemic mixtures, fluorescent whitening dyes, various photochromic materials and as ligands for a wide range of catalytic reactions. Due to ou

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38

McErlean, Christopher Stephen Paschal. "Synthesis and biosynthesis of some naturally occuring oxygen heterocycles /." [St. Lucia, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17082.pdf.

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39

Guilani, Bardia. "Synthesis of novel heterocyclic polymers via the chemistry of Reissert compounds." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42072.

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<p>The chemistry of a well established class of compounds, known as Reissert compounds, was used to prepare several novel N-heterocyclic polymers. Initially, alkylation of quinoline Reissert compounds was closely examined to test the feasibility of the use of such compounds as difunctional monomers. An A-B and an A-A monomer were then prepared by the reaction of quinoline with p-formylbenzoyl chloride and isophthaloyl chloride, respectively. The former monomer could be polymerized interfacially to afford a low molecular weight polyester exhibiting Tg of 190Â°C.</p> <p> Several novel bis-isoqui

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40

Zhong, Cheng. "Amine promoted asymmetric cascade synthesis of highly functionalized heterocycles." Morgantown, W. Va. : [West Virginia University Libraries], 2010. http://hdl.handle.net/10450/10986.

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Thesis (Ph. D.)--West Virginia University, 2010.<br>Title from document title page. Document formatted into pages; contains xvi, 498 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 75-82).

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41

Moragas, Solà Antoni. "Synthesis and use of highly substituted aziridine 2-carboxylates." Thesis, University of Nottingham, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.594593.

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42

Shawcross, Andrew Paul. "The synthesis of novel heterocyclic compounds and observations on the Vilsmeier reaction." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328112.

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43

陳淑妤 and Suk-yu Florence Chan. "Novel synthesis and chemistry of 1, 4, 2-dithiazolium salts." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B30426352.

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44

Santoro, Orlando. "Copper(I)-N-heterocyclic carbene (NHC) complexes : synthesis, characterisation and applications in synthesis and catalysis." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/8409.

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The work described herein focuses on the synthesis and characterisation of copper(I) complexes bearing N-heterocyclic carbene (NHC) ligands, their use in catalysis as well as organometallic synthesis and related reaction mechanisms. Two classes of complexes were considered: neutral NHC-Cu(I) species and their cationic analogues. Concerning the former, initial efforts were focused on the development of a general and straightforward synthetic methodology towards complexes of the type [Cu(X)(NHC)] (X = Cl, Br, I). More than 10 NHC-Cu(I) species were synthesised in high yields under mild condition

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45

Lizano, Gispert Enric. "Design and synthesis of heterocyclic compounds potentially antitumor by enzymatic inhibition." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/671158.

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This doctoral thesis is focused on the investigation and development of new compounds directed to different cancer and tropical diseases targets. Drug resistance, as well in cancer as in tropical diseases, is a hurdle which in the latest years it is driving the scientific community to investigate in new diagnostic techniques, to improve in genomic sequencing, as well as to develop new treatments through the synthesis of new small molecules, for example. The physiologic framework, that drives to resistance, is complex and for this reason, personalized treatments is an increasing concept and ne

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46

Chowdhury, M. L. A. "Oxidation of peptides : synthesis of heterocyclic compounds related to the penicillins." Thesis, Oxford Brookes University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370498.

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47

Ella-Menye, Jean-Rene. "Synthesis of Novel Chiral Heterocyclic Compounds for Antibacterial Agents and Peptidomimetics." ScholarWorks@UNO, 2007. http://scholarworks.uno.edu/td/611.

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Small chiral molecules are very important building blocks in the synthesis of biologically active compounds. These building blocks include nitrogen and oxygen-containing heterocycles 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 dissertation, the design and syntheses of various heterocyclic building blocks are presented, as well as the testing of t

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48

Portela-Cubillo, Fernando. "Oxime derivatives : versatile reagents for radical-mediated syntheses of heterocycles." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/856.

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49

Nguyen, René-Viet 1981. "Catalytic tandem nucleophilic addition for the synthesis of heterocycles." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115708.

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Classical methodologies for carbon-carbon bond formation often require stoichiometric amount of reagent to prefunctionalize a C-H bond. Such methods generate a lot of waste and are therefore not atom-efficient. On the other hand, the use of catalysts for the direct use of C-H bond without prior functionalization is a more desirable approach for carbon-carbon formation. For example, an overall addition reaction is 100% atom economical. This thesis focuses on the catalytic addition of the three types of C-H bonds (Csp-H, Csp2-H and Csp3-H) to unsaturated molecules such as conjugated dienes, imin

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50

Lombard, M. J. "Aspects of the use of N-O heterocyclic compounds in organic synthesis." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370281.

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