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Dissertations / Theses on the topic 'Syntheses of cyclopentenones'

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Published: 4 June 2021

Last updated: 10 February 2022

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1

Casey, G. "Ramberg-Baecklund reactions of thian-4-one derivatives." Thesis, University of East Anglia, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382863.

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2

Yang, Jiong. "The total syntheses of jatrophatrione, citlalitrione, and sclerophytin A studes toward the enantioselective synthesis of fomannosin; photochemical rearrangement of 4-methoxy-4-vinyl-2-cyclopentenones /." Columbus, Ohio : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5num=osu1062130125.

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Thesis (Ph. D.)--Ohio State University, 2003.<br>Title from first page of PDF file. Document formatted into pages; contains xx, 293 p. : ill. Advisor: Leo A. Paquette, Department of Chemistry. Includes bibliographical references (p. 88-101).

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3

Yang, Jiong. "The total syntheses of jatrophatrione, citlalitrione, and sclerophytin A; Studies toward the enantioselective synthesis of fomannosin; Photochemical rearrangement of 4-methoxy-4-vinyl-2-cyclopentenones." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1062130125.

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4

Tumay, Tulay Asli. "Synthesis Of Ferrocenyl Cyclopentenones." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/3/12606372/index.pdf.

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ABSTRACT SYNTHESIS OF FERROCENYL CYCLOPENTENONES TUMAY, T&uuml<br>lay Asli M.S., Department of Chemistry Supervisor: Assoc. Prof. Dr. Metin Zora August 2005, 80 pages Construction of highly functionalized five-membered rings via cycloaddition reaction of cyclopropylcarbene-chromium complex with alkynes has become a very active area of research in recent years by virtue of their presence in antitumour natural products. Also with the finding that ferrocene derivatives are active against various tumours, considerable interest has been devoted to the synthesis of new ferrocene derivatives

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5

Iqbal, Mazhar. "Synthesis of biologically important cyclopentenones." Thesis, University of Liverpool, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420456.

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6

Cheung, Steven. "Novel synthesis of polyfunctional cyclopentenones." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391831.

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7

MeÌnard, Morgan. "Asymmetric synthesis of substituted cyclopentenone derivatives." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398286.

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8

Etheridge, Zac C. "Studies towards the synthesis of neocarzinostatin chromophore." Thesis, University of Sussex, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288634.

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9

Rettie, Alan Bruce. "Use of organometallic complexes for the synthesis of condensed cyclopentenones." Thesis, Heriot-Watt University, 1991. http://hdl.handle.net/10399/1029.

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10

Burke, Mark Richard. "The use of cyclopentenones in the synthesis of novel carbocycles." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486045.

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4-Substituted cyclopentenones are key intermediates in the preparation of an array of highly functionalised cyclopentanes including most importantly in the project, carbocyclic nucleosides which display interesting biological activity. With the discovery that one stereoisomer exhibits generally more biological activity than the opposite stereoisomer and the escalating demand for new drugs to be enantiomerically pure, has led to the principal use ofenzymes in the development of routes to chiral carbocyclic nucleosides. The 1,4-diacetate was prepared via 3,4-diacetoh.)'cyclopentene using a modif

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11

Snape, Timothy J. "The synthesis and biological evaluation of natural and unnatural cyclopentenone prostanoids." Thesis, University of Liverpool, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428214.

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Research into the synthesis and biological properties of the cyclopentenone prostaglandins has become the focus of many research groups over the past few years. The ability for cyclopentenone prostaglandins, for example prostaglandin AI. to reduce virus yields and inflammation, both in vitro and in vivo, and to act as anticancer agents in vitro has made them important biological targets. o .••",~COOH OH prostaglandin Al In view of this, a great deal of work is currently being undertaken towards the preparation of cyclopentenone prostaglandin analogues, in the hope of harnessing the innate biol

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12

Davie, Christopher P. "[4 + 1] annulation reactions of (trialkylsilyl)ketenes : synthesis of substituted indanones and cyclopentenones." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33648.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2005.<br>Vita.<br>Includes bibliographical references.<br>(Trialkylsilyl)vinylketenes ("(TAS)vinylketenes") and (trialkylsilyl)arylketenes ("(TAS)- arylketenes") function as versatile four-carbon building blocks for the synthesis of carbocyclic and heterocyclic compounds. A new [4 + 1] annulation strategy for the synthesis of substituted 2-indanones, based on the reaction of TAS-arylketenes with trimethylsilyl diazomethane, has been developed. In addition, a new class of carbenoid reagents for our previously reported [

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13

Jeffery, Stephen. "The use of thian-4-one derivatives in cyclopentenone natural product synthesis." Thesis, University of East Anglia, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280401.

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14

VERNIER, JEAN-MICHEL. "Decomplexation cyclocarbonylante de complexes dieniques de fer-tricarbonyle : une nouvelle synthese de cyclopentenones polysubstituees." Université Louis Pasteur (Strasbourg) (1971-2008), 1990. http://www.theses.fr/1990STR13075.

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Ce travail decrit une nouvelle voie d'acces a des cyclopentenones polysubstitutees par action du chlorure ou du bromure d'aluminium sur des complexes de fer-tricarbonyle. Une etude systematique, au depart de molecules de plus en plus complexes, a permis de determiner les possibilites synthetiques et les limites de cette nouvelle reaction de decomplexation cyclocarbonylante pour laquelle nous avons propose un mecanisme. L'etude de la stereochimie de cette reaction a montre que si, la decomplexation d'un diene chiral est diastereospecifique, alors la decomplexation cyclocarbonylante l'est aussi.

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15

Liu, Jian. "Application of squarate ester cascade reactions to the synthesis of (+/- ) hypnophilin. New photorearrangements of 2-Cyclopentenones. Studies towards the total synthesis of pectenotoxin II." Columbus, Ohio : Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1037679001.

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Thesis (Ph. D.)--Ohio State University, 2002.<br>Title from first page of PDF file. Document formatted into pages; contains xiv, 242 p.). Includes abstract and vita. Advisor: Leo A. Paquette, Dept. of Chemistry. Includes bibliographical references (p. 233-242).

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16

Forest, Jeremy Scott. "Part 1: Synthesis of new camphor-based auxiliaries; Part 2: isomerization/cyclization of acetylenic ketones to cyclopentenones." Thesis, University of Hawaii at Manoa, 2003. http://hdl.handle.net/10125/6974.

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Part 1: Synthesis of New Camphor-Based Auxiliaries. The development of new camphor-based auxiliaries for an enantioselective route to cyclopentenones is discussed. Changes to the basic camphor auxiliary that was used in the original methodology were made, resulting in a series of seven new camphor-based chiral auxiliaries. These modifications were made with the hope of producing a new auxiliary capable of increasing the enantiomeric excesses of the cyclopentenone products. Synthetic routes to each auxiliary are provided along with the results of the cyclopentannelation reaction. Part 2: Isomer

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17

Sandow, Lisa Rosemary. "The use of sulfonamide linkers, cyclopentenone templates and C-C bond coupling reactions for organic synthesis." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624288.

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18

Li, Yubo. "Design and Synthesis of Ceragenins–Cationic Steroid Antimicrobial Compounds, Structural Improvement and Synthesis of Cyclopentenone Prostaglandins and Modification and Synthesis of Derivatives of Ribityllumazines: Potential Antigens for Activation of MAIT Cells." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/8283.

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Antimicrobial peptides (AMPs) are ubiquitous and display broad-spectrum antimicrobial activity that can control bacterial colonization of surfaces. Ceragenins are small-molecule mimics of AMPs and have several advantages over AMPs, including cost of manufacture and stability. A ceragenin, CSA-120, modified with an acrylamide group was directly incorporated into fluoropolymer coatings as a means of inhibiting bacterial biofilm formation. The ceragenin-containing coatings displayed improved performance. By conjugating a copper chelating group to the ceragenin, chelation of 64Cu by the conjugate

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19

Rasras, Anas [Verfasser], and Sabine [Akademischer Betreuer] Amslinger. "Synthesis of biologically active enones: 2,3-dihydro-1,3,4-oxadiazoles, alpha-X-cyclopentenones and attempts towards limnophilaspiroketone and zerumbone / Anas Rasras. Betreuer: Sabine Amslinger." Regensburg : Universitätsbibliothek Regensburg, 2015. http://d-nb.info/1092188061/34.

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20

Basmadjian, Christine. "Development of new approaches for the synthesis of flavaglines." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF019/document.

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Nous avons développé deux méthodes originales de synthèse de cyclopenténones fonctionnalisées et découvert de nouveaux réarrangements d’alcools 1-styryl propargyliques catalysés par des acides.Ce travail de thèse a aussi permis de mettre en évidence les limitations d’une méthode de synthèse des flavaglines développée par des chercheurs de la compagnie Bayer. De plus, la resynthèse de certaines flavaglines et la synthèse d’une sonde de fluorescence originale ont permis de mieux caractériser le mode d’action et le potentiel thérapeutique des flavaglines pour leurs effets anticancéreux (notamment

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21

Bernardes-Genisson, Vania. "Induction asymétrique dans la réaction intermoléculaire de Pauson-Khand et synthèse formelle de la (+)-brefeldine-A." Université Joseph Fourier (Grenoble ; 1971-2015), 1995. http://www.theses.fr/1995GRE10144.

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La réaction de Pauson-Khand, une cycloaddition entre un alcène, un alcyne et du monoxide de carbone représente l'une des méthodologies, mettant en jeu des métaux de transition, les plus efficaces pour préparer des cyclopentenones. L'emploi d'un auxiliaire de chiralite lie directement au partenaire acetylenique de cette réaction nous a permis, dans un premier temps, de développer une version asymétrique de la réaction intermoléculaire de pauson-khand. La réussite de cette stratégie a été possible grâce à la mise au point d'une méthode efficace et générale de préparation de complexes de cobalt d

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22

Andrade, Késsia Hapuque Santos de. "Cyclopentenones: synthesis and biological evaluation in human cancer cells." Master's thesis, 2018. http://hdl.handle.net/10362/56365.

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Cyclopentenones (CPs) are cyclic ketones whose structure consists of an α, β-unsaturated carbonyl group attached to a membered ring. Many compounds which contain the cyclopentenone ring are biologically active, for example prostaglandins which have antiviral, anti-inflammatory, antifungal, apoptotic and antitumor properties It has been shown that most of these properties are due to the Michael acceptor character of the α, β-unsaturated carbonyl, group which can react with various nucleophiles. An example is the reaction with Glutathione, which acts on detoxification mechanisms, contributing p

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23

Praveen, Kumar P. "Synthesis Of 6-Epijunicedranol ; Spirocyclopentannulation Strategies ; And Exploratory Studies Towards Chiral Taxanes." Thesis, 1999. http://etd.iisc.ernet.in/handle/2005/1624.

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24

Esteves, Nuno de Carvalho Vidal Reis. "Synthesis and biological evaluation of furfural carbocycles derivatives." Master's thesis, 2017. http://hdl.handle.net/10451/36156.

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Trabalho Final de Mestrado Integrado, Ciências Farmacêuticas, Universidade de Lisboa, Faculdade de Farmácia, 2017<br>Furfural, a natural product present in the agricultural wastes of bagasse and bran. Cyclopentenones have seen a great development since 1800’s to 1900’s and are still opening ways in organic synthesis as they are a type of building block present in various natural molecules. In this work we present a new methodology of synthesising trans-4,5diamino-cyclopent-2-enones, with the use of Cu(OTf)2 in water in 5 minutes, paving the way for a wide range of reactivity to be explored.

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25

Wang, Yun-Ting, and 王韻婷. "Rh(I)-Catalyzed Conjugate Addition Reaction of Organoboronic Acids with a Chiral Cyclopentenone for the Synthesis of Prostaglandin Derivatives." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/32233301940653038146.

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26

Gomes, Rafael. "New synthetic asymmetric methodologies for the synthesis of bioactive building blocks and potential scale up/out." Doctoral thesis, 2019. http://hdl.handle.net/10451/42269.

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Preparation of medicinal relevant small molecules from biomass is a field of interest due to 1) structural diversity obtained in biomass modification, 2) being sustainable and an environmentally friendly approach, 3) low cost of starting materials most likely lead to low cost of final product. Amoungst biomass, the furans have been given special attention by the scientific community, namely furfural and 5-hydroxymethylfurfural (HMF). They can be obtained by de dehydration of non-edible carbohydrates and have been described as key building blocks for the future. On the other hand, cyclopenten

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27

Penchalaiah, Kamala. "Total Synthesis Of Bio-Active Natural Products Microcarpalide, Synargentolide A, Jaspine B And Anamarine." Thesis, 2011. http://hdl.handle.net/2005/2007.

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The thesis entitled “Total synthesis of bio-active natural products microcarpalide, synargentolide A, jaspine B and anamarine.” demonstrates the utility of chiral pool tartaric acid as the source in the synthesis of bio-active natural products. The thesis was divided into four sections. Section I of the thesis deals with the enantiodivergent synthesis of microcarpalide from tartaric acid. Microcarpalide is a 10-membered lactone of polyketide origin isolated from the fermentation broths of an unidentified endophytic fungi, found to be weekly cytotoxic to mammalian cells and acts as a microfila

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28

Klaubert, Bernd. "Phytochemische Untersuchung der brasilianischen Arzneipflanzen Costus scaber (Costaceae) und Prevostea ferruginea (Convolvulaceae) : Isolierung und Strukturaufklärung der Inhaltsstoffe sowie die Synthese von Costerin, einem neuen natürlichen Cyclopentenon /." 1998. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=008262291&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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