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Dissertations / Theses on the topic 'Alkaloids'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Witt, Anette. "Synthetic development towards benzodiazepine alkaloids : total synthesis of circumdatin F and C /." Stockholm, 2002. http://diss.kib.ki.se/2002/91-7349-077-6/.

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2

Callaghan, Owen. "Synthetic and mechanistic studies in free radical." Thesis, University of Strathclyde, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366957.

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3

Kalusa, Andrew. "Synthesis of marine alkaloids." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275274.

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4

Goddard, Euan. "Asymmetric Synthesis of Alkaloids." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489446.

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5

Smith, Catherine Janet. "Synthesis of histrionicotoxin alkaloids." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620245.

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6

Brock, Elizabeth Anne. "Alkaloids from transannular iodoaminations." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:0feddc99-0fde-4dcd-b717-b0c6b0515615.

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This thesis is concerned with the development of transannular iodoamination methodology for the synthesis of pyrrolizidine, indolizidine and tropane alkaloids. Chapter 1 introduces the concept of a ‘transannular cyclisation’ and outlines the utility of such cyclisations in the synthesis of a range of [x.y.z]-azabicyclic alkaloids. Chapter 2 describes the development of a three step lithium amide conjugate addition, ring-closing metathesis and transannular iodoamination protocol for the preparation of the pyrrolizidine scaffold ([3.3.0]-azabicycle). Cyclisation of a hexahydroazocine occurs with

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7

Stanley, Paul. "Semisynthesis of jerantinine alkaloids." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/47504/.

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This thesis details the synthetic studies undertaken on natural products with anti-cancer activity. The general aim was to explore the synthesis and find an efficient and effective method to generate compounds, which would be used to further examine novel biological action. The first half of this thesis details the synthetic studies on the jerantinine family of natural products. The approach utilised the complex alkaloid (-)-tabersonine as a starting material, which was isolated from an abundant and sustainable source. Ultimately the first synthesis of (-)-jerantinine A and first enantioselect

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8

Choi, Joong-Kwon. "Synthesis of pyrrolizidine alkaloids /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487259125219504.

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9

Saensuk, Pilan. "Phytochemistry of norditerpenoid alkaloids." Thesis, University of Bath, 2007. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485128.

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Norditerpenoid alkaloids have important biological activities. Many of them are potent ligands and therefore promising leads for novel selective antagonists and/or agonists of subtypes of nicotinic acetylcholine receptors (nAChR) and voltage-gated sodium channels. Aconitum, Consolida, and Delphinium are important sources of norditerpenoid alkaloids. This thesis is focussed on the chemistry of norditerpenoid alkaloids from these three genera, starting with a review of those recently isolated from Aconitum, Consolida, and Delphinium with brief aspects of taxonomy, biological activities, and mode

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10

Sedlock, Andrea B. "Ergot alkaloids and herbivory in model animals and variation in an ergot alkaloid biosynthesis gene." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3190.

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Thesis (M.S.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains viii, 62 p. : ill. (some col.) Vita. Includes abstract. Includes bibliographical reference.

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11

Antropow, Alyssa Hope. "Synthesis and anticancer evaluation of agelastatin alkaloid derivatives and enantioselective total synthesis of aspidosperma alkaloids." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118214.

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Thesis: Ph. D. in Organic Chemistry, Massachusetts Institute of Technology, Department of Chemistry, 2018.<br>Cataloged from PDF version of thesis. Vita.<br>Includes bibliographical references.<br>I. Synthesis and Evaluation of Agelastatin Derivatives as Potent Modulators for Cancer Invasion and Metastasis The synthesis of new agelastatin alkaloid derivatives and their anticancer evaluation in the context of the breast cancer microenvironment is described. A variety of Ni -alkyl and C5-ether agelastatin derivatives were accessed via application of our strategy for convergent imidazolone synthe

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12

Coufal-Majewski, Stephanie. "Characterising the impact of ergot alkaloids on digestibility and growth performance of lambs." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17226.

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The negative impacts of ergot contamination of grain on the health of humans and animals were first documented during the fifth century AD. Although ergotism is now rare in humans, cleaning contaminated grain concentrates ergot bodies in screenings which are used as livestock feed. Ergot is found worldwide, with even low concentrations of alkaloids in the diet (<100 ppb total), reducing the growth efficiency of livestock. Extended periods of increased moisture and cold during flowering promote the development of ergot in cereal crops. Furthermore, the unpredictability of climate change may hav

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13

Hesse, Ronny, Anne Jäger, Arndt W. Schmidt, and Hans-Joachim Knölker. "Palladium(II)-catalysed total synthesis of naturally occurring pyrano[3,2-a]carbazole and pyrano[2,3-b]carbazole alkaloids." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-149135.

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Seven naturally occurring pyranocarbazole alkaloids (pyrayafoline A–E, O-methylmurrayamine A and O-methylmahanine) have been obtained by total synthesis using a palladium(II)-catalysed oxidative cyclisation of a diarylamine to an orthogonally diprotected 2,7-dihydroxycarbazole as key step.

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14

Pereira, Tamara Nishanthi. "Cytotoxic effects of pyrrolizidine alkaloids /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18303.pdf.

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15

Bosch, Caroline. "Total Synthesis of Phlegmarine Alkaloids." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/399380.

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This doctoral thesis consists in two main parts. The first part focus in the study of methodology development in order to bring modularity and diversification to compounds studied within the research group. It consists first in the development of an easy procedure to access enantiopure substituted octahydroindoles relevant for natural products synthesis, then in the diversification of a common building block used for the total synthesis of phlegmarine alkaloids allowing access to unprecedented heterocyclic tetrahydrocarbazoles compounds, but most importantly in the achievement of a methodology

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16

Chiba, Hiroaki. "Total Synthesis of Tetrahydroisoquinoline Alkaloids." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/174544.

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17

Shabrawy, Abdel-Rahman Omar El. "Alkaloids of selected medicinal plants /." Ann Arbor : Univ. Microfilms Intenational, 1985. http://www.gbv.de/dms/bs/toc/016435753.pdf.

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18

Swain, D. J. "Stereoselective synthesis of indole alkaloids." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238115.

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19

Bell, Andrew A. "Synthesis of pentahydroxylated bicyclic alkaloids." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364022.

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20

Black, Gregory Philip. "Synthetic studies towards guanidine alkaloids." Thesis, Bangor University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263304.

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21

Montgomery, David J. "Synthetic approaches to pulmiliotoxin alkaloids." Thesis, Queen's University Belfast, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333820.

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22

Nelson, A. "Synthesis of bioactive indolizidine alkaloids." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421009.

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23

Barr, Stephen Alexander. "Quinoline alkaloids : synthesis and stereochemistry." Thesis, Queen's University Belfast, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333796.

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24

Ozturk, Turan. "Synthetic studies on cytotoxic alkaloids." Thesis, University of East Anglia, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292160.

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25

Rutherford, M. J. "Dimeric indole and quinolinone alkaloids." Thesis, University of Ulster, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378774.

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26

Williams, David Alan John. "Radical approaches toward polycyclic alkaloids." Thesis, University of York, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323499.

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27

Mohamad, Shaza Eva. "Biotransformation of the morphinan alkaloids." Thesis, University of York, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445460.

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28

Hollinshead, S. P. "Enantiospecific approaches to indole alkaloids." Thesis, University of York, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379030.

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29

Coates, Galle. "Asymmentric synthesis of pyrrolidine alkaloids." Thesis, King's College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404336.

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30

Jenkinson, Julian John. "Tandem cyclisations towards indole alkaloids." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359241.

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31

West, Robert Ian. "Synthetic approaches to Strychnos alkaloids." Thesis, University of Southampton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315007.

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32

Gibbs, Gary. "Synthetic strategies towards hydroxylated alkaloids." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387484.

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33

Sharpe, David Anthony. "Synthetic studies towards ergot alkaloids." Thesis, Sheffield Hallam University, 1989. http://shura.shu.ac.uk/20353/.

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Some of the background to the biosynthesis, synthesis and uses of ergot alkaloids has been reviewed. A novel synthesis of the indole system has been used in an attempt to synthesise a derivative of the tricyclic Uhles ketone. A variation on this method has been carried out using 3-indole propionic acid as the starting material. The novel synthesis of the indole ring system has been developed into a synthesis of a 4-substituted indole. A number of literature methods for the synthesis of 4-substituted indoles have been investigated, and their usefulness in the laboratory assessed. A modified Rei

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34

French, Christopher E. "Biotransformations of the morphine alkaloids." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/272997.

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35

Rudge, Andrew John. "The synthesis of polyhydroxylated alkaloids." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/272797.

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36

Kim, Hea-Young. "Molecular Toxicology of Pyrrolizidine Alkaloids." DigitalCommons@USU, 1994. https://digitalcommons.usu.edu/etd/3910.

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Pyrrolizidine alkaloids are cytotoxic, carcinogenic, and anti-carcinogenic in vivo and in vitro, and they produce many hazardous effects in humans and animals. Pyrrolizidine alkaloids (PAs) also cross-link with DNA and/or protein. However, whether such cross-linking is important to the toxic action of PAs is not known. In addition, the exact mechanism underlying these DNA cross-links or cytotoxicity is also not clear. In three separate studies, I characterized the nature of PA-induced DNA cross-links and the relationships between PA structures and cross-linking potency. In the first study (Cha

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37

Romeril, Stuart P. "Synthesis and structural elucidation of the Bis-3-alkylpyridine alkaloid pyrinodemin A and other monomeric alkaloids." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288526.

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38

Tang, Minyan. "The asymmetric synthesis of polyhydroxylated pyrrolizidine alkaloids." Department of Chemistry - Faculty of Science, 2004. http://ro.uow.edu.au/theses/233.

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Chapter 1 of this thesis is a review of the literature on the structure, biological activities and synthesis of polyhydroxylated 3-hydroxymethylpyrrolizidine alkaloids. This Chapter also outlines he aims of this project, which were to develop a flexible synthesis of the 1,2,7-trihydroxy-3-hydroxymethylpyrroizidine alkaloid australine, and its epimers. Chapter 2 describes model synthetic chemical studies on the synthesis of the pyrrolizidine core structure. The key synthetic steps, the aminolysis reaction of vinyl expoxides with ally1 amine, the ring-closing metathesis of the resulting diene, s

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39

Gassner, Cemena, Ronny Hesse, Arndt W. Schmidt, and Hans-Joachim Knölker. "Total synthesis of the cyclic monoterpenoid pyrano[3,2-a]carbazole alkaloids derived from 2-hydroxy-6-methylcarbazole." Royal Society of Chemistry, 2014. https://tud.qucosa.de/id/qucosa%3A28532.

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40

Williams, Benjamin [Verfasser], and Dirk [Akademischer Betreuer] Trauner. "Chiral pool approaches to lycopodium alkaloids, orchidaceae alkaloids and photoswitchable ceramides / Benjamin Williams ; Betreuer: Dirk Trauner." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/118820002X/34.

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41

Mihali, Troco Kaan Biotechnology &amp Biomolecular Sciences Faculty of Science UNSW. "Biosynthesis of toxic alkaloids in cyanobacteria." Publisher:University of New South Wales. Biotechnology & Biomolecular Sciences, 2008. http://handle.unsw.edu.au/1959.4/41485.

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Freshwater cyanobacteria produce a wealth of biologically active metabolites, which can adversely affect human and animal health, and cause great economic damage to the fishing, tourism and water-management industries on a global scale. We describe the molecular genetics and biochemistry of biosynthesis for the cyanobacterial toxic alkaloids cylindrospennopsin, paralytic shellfish toxins (PST) and anatoxin-a. Characterisation of the 43 kb cylindrospennopsin biosynthesis gene cluster (cyr), in Cylindrospermopsis raciborskii AWT205 is described. Biosynthesis is initiated via an amidinotransfer o

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42

Wu, Tao. "Synthetic studies on polycyclic indole alkaloids." [Ames, Iowa : Iowa State University], 2006.

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43

Hager, Dominik. "From nucleosides to alkaloids and polyketides." Diss., Ludwig-Maximilians-Universität München, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-153975.

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This dissertation describes the synthetic work on several natural products including nucleosides, alkaloids, and polyketides. The first and main part of this thesis focuses on the total synthesis of the nucleoside antibiotics herbicidin C and its hydrolysis product aureonuclemycin. Due to their diverse biological activity, the herbicidins are considered as promising herbicides for agricultural application. In cooperation with Bayer CropScience AG, a flexible and efficient access to the herbicidins was developed and the challenges and successes of this synthesis are described in detail. More s

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44

Smith, Adrian L. "The nitrone route to dentrobatid alkaloids." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316802.

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45

Lunn, R. J. "Enantiospecific syntheses of alkaloids from carbohydrates." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376938.

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46

Potts, Deirdre Ann. "Synthesis of Piclavine and Martinelline alkaloids." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.484265.

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47

Evans, Daniel Mackenzie. "Synthetic steps towards the cylindrospermopsin alkaloids." Thesis, Bangor University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.590643.

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Detailed herein is the tethered Biginelli condensation between irninium ion 201 and beta keto ester 206 leading to a model tricyclic ring system representative of the guanidinium core of cylindrospennopsin alkaloids. This was achieved in a biosynthetically-inspired manner in 12 steps and 8.3% overall yield from simple, commercially available 1,5-pentanediol 172. Also discussed is the adaption of this methodology to allow for the highly efficient stereoselective synthesis of all 3 of the cylindrospermopsin alkaloids and the preparation of the advanced synthetic intermediate nitro-alcohol 223.

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48

Gardiner, John Michael. "New synthetic strategies towards cephalotaxus alkaloids." Thesis, Durham University, 1988. http://etheses.dur.ac.uk/6438/.

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Michael alkylation, with methyl acrylate, of nitrocyclohexenes bearing functionalized aromatic substituents at the 2-position, was found to be highly stereo selective. Subsequent dissolving metal reductive cyclization was highly efficient, and these two steps thus provided a stereo specific entry to a substituted 1-azaspirocyclic system, related to the cephalotaxine skeleton. Application of this methodology to trans-4-(3,4-dimethoxy-6-carbo- methoxyraethylphenyl)-5-nitrocyclohexene afforded spirolactam ester 6-(3,4-dimethoxy-6-carboraethoxymethylphenyl)-2-oxo-l-azaspiro[4.5]dec-8-ene. On reduc

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49

Ross, Frances I. "Efficient synthetic routes to indole alkaloids." Thesis, Heriot-Watt University, 1999. http://hdl.handle.net/10399/588.

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50

Cochrane, Philip. "Short synthetic routes to indole alkaloids." Thesis, Heriot-Watt University, 2000. http://hdl.handle.net/10399/529.

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