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Dissertations / Theses on the topic 'Butenolides'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Sirit, A. "Asymmetric synthesis of butenolides." Thesis, Swansea University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639047.

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Optically active butenolides have been prepared from the reaction of chiral 1,3-dioxolans and 1,3-oxazolidines with the silyl enol ethers 2-trimethylsilyloxyfuran and 2-trimethylsilyoxy-4-methoxyfuran. Chiral 1,3-dioxolans were prepared in high yields (80-96%) by the exchange reaction of diisopropyl L-tartrate with triethyl orthoformate, triethyl orthoacetate and triethyl orthobenzoate. These were reacted with 2-trimethylsilyoxyfuran (TMSOF) under Lewis acid conditions to give optically active butenolides. The stereoselectivity and yield were not very good. (-)-(R)-Phenyl glycinol and (-)-(1R,
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2

Brown, David William. "Radical additions to butenolides." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360719.

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3

Jarvis, Ashley N. "Preparation and ring-opening reactions of N-diphenylphosphinyl vinylaziridines." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301977.

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4

Schacht, Mathias [Verfasser], and Nina [Akademischer Betreuer] Schützenmeister. "Synthesis of Natural Abundant Butenolides and Analogues / Mathias Schacht ; Betreuer: Nina Schützenmeister." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1197801359/34.

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5

Pais, G. C. G. "Synthesis of sex pheromonal lactones and antitumor butenolides and heterogeneous catalysis for organic transformations." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1997. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3322.

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6

Karak, Milandip. "A stereoselective vinylogous aldol reaction of tetronamides and the synthesis of rubrolides and beta- substituted butenolides." Universidade Federal de Viçosa, 2017. http://www.locus.ufv.br/handle/123456789/13425.

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Submitted by Marco Antônio de Ramos Chagas (mchagas@ufv.br) on 2017-11-21T15:24:32Z No. of bitstreams: 1 texto completo.pdf: 20136211 bytes, checksum: 27955f4b1fd7b5bdf978d63e7c835f6b (MD5)<br>Made available in DSpace on 2017-11-21T15:24:32Z (GMT). No. of bitstreams: 1 texto completo.pdf: 20136211 bytes, checksum: 27955f4b1fd7b5bdf978d63e7c835f6b (MD5) Previous issue date: 2017-01-27<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Os butenolídeos, que apresentam em sua estrutura o núcleo lactona α, -insaturada, são encontrados em produtos naturais e não naturais com div
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7

Khatod, H. S. "Synthetic studies towards sesquiterpene butenolides, (S)-ar-himachalene, development of synthetic methodology and it's application in synthesis of (R)- venlafaxine." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2016. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2069.

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8

Loach, Richard. "Methodologies for the regiocontrolled assembly of a-substituted butenolides and 5-hydroxypyrrol-2(5H)-ones : enantioselective total synthesis of annomolon A & auxofuran." Thesis, Université Laval, 2013. http://www.theses.ulaval.ca/2013/29954/29954.pdf.

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Les travaux de cette thèse concernent des synthèses totales de produits naturels d’importance biologique, qui ont pu être réalisées grâce au développement de méthodologies pour synthétiser des hétérocycles oxygénés et azotés. Le premier chapitre comprend le développement d’une méthodologie pour synthétiser des buténolides substitués en alpha, en utilisant le 3-bromo-2-silyloxyfurane pour former un nucléophile très général via échange lithium-halogène, et a démontré une excellente réactivité avec une grande variété d’électrophiles. La flexibilité de ce protocole nous a permis de compléter la pr
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9

MOSTEFA-KARA, BACHIR. "Preparation et etude de la reactivite de cetones-imidazoles, de ##,#-butenolides et de 3-pyrrolin-2-ones. Applications a la synthese de fongicides potentiels." Paris 6, 1994. http://www.theses.fr/1994PA066657.

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Le travail realise a pour but, dans une premiere partie, la synthese de fongicides contenant l'heterocycle imidazole. Des alcools imidazoliques, ont ainsi ete prepares par plusieurs methodes differentes: action de l'imidazole sode sur les -halohydrines ou les epoxydes, composes precurseurs obtenus par condensation de divers organometalliques (organomagnesiens satures, organozinciques allyliques) sur les cetones -halogenees. Addition directe d'organozinciques allyliques sur les cetones-imidazoles ; ces dernieres ont ete preparees au prealable par une nouvelle methode. Action de phenates et d'ox
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10

Rodier, Fabien. "Nouvel accès chimio-, régio- et stéréosélectif aux motifs spirolactones polycycliques via une réaction de cycloaddition [3+2]." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4324.

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Le système spirocyclique (7,5) est un motif récurrent dans un certain nombre de produits naturels tels que les Micrandilactones ou les Rubriflordilactones. Ces structures polycycliques représentent un réel défi synthétique pour les chimistes organiciens puisqu'elles présentent au moins neuf centres stéréogènes dont plusieurs sont quaternaires. L'objectif principal de ce travail était de développer de nouvelles réactions de cycloaddition [3+2] et de les utiliser comme étape clé afin d'obtenir rapidement et efficacement le squelette polycylique de ces composés. La première partie de ces travaux
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11

Deepake, S. K. "β, γ- Butenolides in dual role: as vinylogous nucleophile for michael initiated synthesis of indanol derivatives and as organocatalyst for the α-CH2 oxygenation of cyclic amines/ethers". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2021. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5974.

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12

Souza, Kamilla Alessandra de Paula. "Síntese e avaliação da fitotoxicidade de novos butenolídeos análogos aos nostoclídeos." Universidade Federal de Viçosa, 2007. http://locus.ufv.br/handle/123456789/2042.

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Made available in DSpace on 2015-03-26T13:00:03Z (GMT). No. of bitstreams: 1 texto completo.pdf: 802007 bytes, checksum: bcc020909e933a451dfda4bc8f17dee0 (MD5) Previous issue date: 2007-10-29<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The nostoclides belong to a class of natural compounds called &#947;-alkylidenebutenolides that have several representatives with biological application. To contribute to the study of this class of compounds, this present work aimed to synthesize new butenolides analogous to the nostoclides from furan-2 (5H)-one [8] and evaluate the phy
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13

Kendall, Jennifer E. (Jennifer Elaine) Carleton University Dissertation Chemistry. "The Biosynthesis of Butenolide by Fusarium culmorum HLX 1503." Ottawa, 1988.

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14

Thomas, A. "The enantiospecific synthesis of natural product analogues from carbohydrates." Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356073.

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15

Schickmous, Barhiem [Verfasser], Jens [Akademischer Betreuer] Christoffers, and Jürgen [Akademischer Betreuer] Martens. "Studien zur Synthese von Furanen und Butenoliden / Barhiem Schickmous. Betreuer: Jens Christoffers ; Jürgen Martens." Oldenburg : BIS der Universität Oldenburg, 2015. http://d-nb.info/1070623679/34.

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16

Schickmous, Barhiem Verfasser], Jens [Akademischer Betreuer] [Christoffers, and Jürgen [Akademischer Betreuer] Martens. "Studien zur Synthese von Furanen und Butenoliden / Barhiem Schickmous. Betreuer: Jens Christoffers ; Jürgen Martens." Oldenburg : BIS der Universität Oldenburg, 2015. http://d-nb.info/1070623679/34.

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17

Urbina-Gonzalez, Juan-Manuel. "Fused and spiro furanones from tetronic acid synthons oxa and azacycles featuring the butenolide ring /." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982351690.

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18

Rodier, Fabien. "Nouvel accès chimio-, régio- et stéréosélectif aux motifs spirolactones polycycliques via une réaction de cycloaddition [3+2]." Electronic Thesis or Diss., Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4324.

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Le système spirocyclique (7,5) est un motif récurrent dans un certain nombre de produits naturels tels que les Micrandilactones ou les Rubriflordilactones. Ces structures polycycliques représentent un réel défi synthétique pour les chimistes organiciens puisqu'elles présentent au moins neuf centres stéréogènes dont plusieurs sont quaternaires. L'objectif principal de ce travail était de développer de nouvelles réactions de cycloaddition [3+2] et de les utiliser comme étape clé afin d'obtenir rapidement et efficacement le squelette polycylique de ces composés. La première partie de ces travaux
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19

Kong, Ke. "Studies toward the total synthesis of the marine toxin, (-)-gymnodimine." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2447.

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20

Bagal, Sharanjeet K. "The dimerisation of butenolide structures : a biomimetic approach to the dimeric sesquiterpene lactones (±)-biatractylolide and (±)-biepiasterolide." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409726.

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21

Ribeiro, Martins Xavier Nuno Manuel. "Synthesis of new sugar derivatives containing an α,β -unsaturated carbonyl system in their structure and biological evaluation". Thesis, Lyon, INSA, 2011. http://www.theses.fr/2011ISAL0023.

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Ce travail de doctorat porte sur la synthèse et utilisation de bicyclolactones glycidiques, de façon à accéder des dérivés de sucres contenant un système carbonylé α,β-insaturé. Trois types de bicyclolactones ont été étudiés: butenolides liés à des cycles furanose, butenolides fusionnés à des cycles pyranose, comprenant S- et NH-analogues et carboxyméthyle glycosides lactones (CMGLs). La méthodologie de synthèse de butenolides sur motif sucre est basée sur l’oléfination de Wittig de 3 ou 5-cétosucres et lactonisation intramoléculaire spontanée de gamma-hydroxyesters α,β-insaturés intermédiaire
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22

Flourat, Amandine. "Valorisation de co-produits de filières agroindustrielles, de la chimie verte aux applications." Thesis, Reims, 2020. http://www.theses.fr/2020REIMS020.

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La nécessité d’un passage à une économie verte est de plus en plus pressante comme le confirme le récent rapport du GIEC. Afin de soutenir la structuration de filières agro-industrielles durables pour la production d’énergie ou de produits de commodité, le développement parallèle de marchés à plus petit volume mais avec une très forte valeur ajoutée est nécessaire. Parmi ces marchés à fort potentiel, les domaines de la santé et de la cosmétique sont particulièrement porteurs. Deux développements relevant de la chimie du végétal seront abordées par le prisme des coproduits générés à l’issue d’u
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23

Peil, Sebastian [Verfasser], Alois [Akademischer Betreuer] Fürstner, and Norbert [Gutachter] Krause. "Anwendungen der geminalen Hydrierung von Alkinen: hydrierende Cyclopropanierung und Metathese, hydrierende Furan- und Butenolid-Synthese / Sebastian Peil ; Gutachter: Norbert Krause ; Betreuer: Alois Fürstner." Dortmund : Universitätsbibliothek Dortmund, 2021. http://d-nb.info/1238349803/34.

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24

Croisetière, Jean-Philippe. "Cycloaddition (4+1) formelle intermoléculaire entre un carbène libre riche en électrons et des carbonyles α,β-insaturés et transformations de l’orthoester obtenu en furanne et 5H-furanone". Mémoire, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/11063.

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Le premier chapitre traite d’une réaction de cycloaddition (4+1) sur des énones et des énals à l’aide du diméthoxycarbène. Cette méthode permettrait d’obtenir des hétérocycles à cinq membres à partir de substrats linéaires simples et faciles à fabriquer. On retrouve dans ce chapitre l’optimisation de cette étape réactionnelle, ainsi que son utilisation pour préparer une gamme de substrats. Le second chapitre traite de la transformation des hétérocycles obtenus, et décrits au chapitre précédent, en furannes ainsi qu’en furanones. Cette méthode permet la transformation d’énones et d’énals en
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25

Barnych, Bogdan. "Synthetic studies toward plakortolides : asymmetric synthesis of ent-plakortolide I and seco-plakortolide E." Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00923550.

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In this thesis manuscript are described our synthetic efforts and the first total synthesis of two natural products isolated from the sponges of the genus Plakortis. In total, two different synthetic approaches were studied to finally accomplish the synthesis of plakortolide I. The first approach is an extension of the method developed by our group which consists in the creation of the 1,2-dioxane cycle by intramolecular opening of vinyl epoxide with β-hydroperoxy group. Firstly, we was interested in the preparation of alkoxymethylhexa-2,5-dien-1-ol. We have also tried to create the 1,2-dioxan
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26

Campbell, Craig D. "Lewis base-promoted organocatalysis : O- to C-carboxyl transfer reactions." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/2609.

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This work describes the application of a variety of Lewis bases, encompassing predominantly N-heterocyclic carbenes (NHCs), but also the use of imidazoles, aminopyridines, amidines and isothioureas, as effective catalysts in the dearomatisation of heterocyclic carbonates, predominantly the rearrangement of oxazolyl carbonates to their C-carboxyazlactone isomers by means of the Steglich rearrangement. This rearrangement reaction has been investigated extensively, with the development of simplified reaction procedures and the invention of domino cascade protocols incorporating this transformatio
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27

Jusseau, Xavier. "Etudes sur la synthèse du coeur spiroimine de la (–)-gymnodimine A et réaction d'addition asymétrique de silyloxyfuranes sur des accepteurs de Michael cycliques." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112283/document.

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Les gymnodimines, les spirolides, les pinnatoxines et les ptériatoxines constituent une famille de toxines d’origine marine de structures complexes, produites en faibles quantités par des microorganismes marins appelés dinoflagellés. Ces toxines sont connues pour bloquer les récepteurs nicotiniques de l’acétylcholine (nAChRs) sans que leur mode d’action ne soit connu avec précision. D’après les différents tests biologiques réalisés à ce jour, il semblerait que le motif spiroimine, commun à toutes ces molécules, soit essentiel pour l’activité antagoniste. Un accès rapide à ce motif spiroimine a
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28

Simlandy, Amit Kumar. "Carbon-Carbon and Carbon Heteroatom Bond Forming Reactions: From Organocatalysts to Quantum Dots." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/5433.

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Butenolides containing stereogenic centers on the ring, are commonly encountered structural motifs, found in many natural products. Consequently, there has been considerable interest in efficient and stereoselective synthesis of functionalized butenolides. The installation of an unfunctionalized allyl group on the unactivated butenolides in regio- and enantioselective fashion, constitutes a serious challenge and at the same time has the potential to generate densely functionalized molecular architectures. In conclusion, we have demonstrated the ability of CdSe nanocrystals to sensitize
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29

Mei, Nai-Wen, та 梅乃文. "Development of Purines-containing Butenolides and a Tetrahydroimidazobenzodiazepinone Analog as Anticancer and Anti-HIV Agents. Silicon-Promoted Norrish Type II Cleavage by a β-Stablization Effect". Thesis, 2000. http://ndltd.ncl.edu.tw/handle/99369057305652406380.

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博士<br>國立清華大學<br>化學系<br>89<br>In this thesis, we designed novel butenolide derivatives of nucleobases as anticancer agents. We also prepared a tetrahydroimidazobenzodiazepinone analog as anti-HIV agent. Furthermore, silicon-promoted Norrish type II cleavage by a -stabilization effect was investigated. In part 1 of this thesis, a series of butenolide-containing 6-chloropurine having an active double bond was synthesised to inhibit enzymes crucial to metabolic pathways in cell division. Those compounds exhibited moderate anticancer activity. In part 2 of this thesis, int
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30

Lao, Lsin-Liang, and 羅信良. "Synthetic Studies Toward the Butenolide Subunit of Annonaceous Acetogenins." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/30705989238645740597.

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碩士<br>高雄醫學院<br>天然藥物研究所<br>86<br>During the last dacade, over 200 potent secondary metabolites were isolated, which are now called annonaceous acetoganins. Tey are a kind of cytotoxic tetrahydrofuran γ-lactone compound discovered in 1982 and showed potent cytotoxic, anticancer, antimalaria, peticidal, antimicrobal , immunosupressing and antifeedant activities. The structures of annonaceous acetogenins always possess following the ring-system moieties such as te
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31

Manna, Madhu Sudan. "Controlling Stereochemistry at the Quaternary Center using Bifunctional (THIO)Urea Catalysis." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3664.

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The thesis entitled “Controlling Stereochemistry at the Quaternary Center Using Bifunctional (Thio)urea Catalysis” is divided into five chapters. Chapter 1: Catalytic Enantioselective Construction of Quaternary Stereocenters through Direct Vinylogous Michael Addition of Deconjugated Butenolides to Nitroolefins The direct use of deconjugated butenolides in asymmetric C–C bond forming reaction is a powerful but challenging task because of the additional problem of regioselectivity along with the issues of diastereo- and enantioselectivity. In this chapter, a direct asymmetric vinylogous Michae
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Manna, Madhu Sudan. "Controlling Stereochemistry at the Quaternary Center using Bifunctional (THIO)Urea Catalysis." Thesis, 2015. http://etd.iisc.ernet.in/2005/3664.

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The thesis entitled “Controlling Stereochemistry at the Quaternary Center Using Bifunctional (Thio)urea Catalysis” is divided into five chapters. Chapter 1: Catalytic Enantioselective Construction of Quaternary Stereocenters through Direct Vinylogous Michael Addition of Deconjugated Butenolides to Nitroolefins The direct use of deconjugated butenolides in asymmetric C–C bond forming reaction is a powerful but challenging task because of the additional problem of regioselectivity along with the issues of diastereo- and enantioselectivity. In this chapter, a direct asymmetric vinylogous Michae
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33

Tichotová, Lucie. "Zkoumání přičin cytotoxicity konjugátů butenolidů s heterocykly." Master's thesis, 2006. http://www.nusl.cz/ntk/nusl-268371.

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34

Šenel, Petr. "Studium vztahů struktura - antifungální aktivita u substituovaných butenolidů." Doctoral thesis, 2009. http://www.nusl.cz/ntk/nusl-278468.

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Within the framework of this Thesis, several series of 3-(4-bromophenyl)-2,5- -dihydrofuran-2-ones with various substituents at C(5) derived from in vitro antifungally active 3-(4-bromophenyl)-5-acetyloxymethyl-2,5-dihydrofuran-2-one were prepared with the aim of further development of potential antifungals based on this lead. Primarily, we focused on the synthesis of furanones bearing alkylidene or alkoxymethyl/aryloxymethyl moiety in position 5. We found that 5-acyloxymethyl and 5-aryloxymethyl furanone derivatives undergo elimination leading to 3-(4-bromophenyl)-5-methylene-2,5-dihydrofuran
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35

Chou, Ming-Chen, and 周銘城. "Synthesis of a,b-butenolide from r-oxo-a,b-unsaturat thioester." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/74568066189271645873.

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碩士<br>國立交通大學<br>應用化學系<br>83<br>Reaction of cis-r-oxo-a,b-unsaturated thioesters with sodiumdride, Grignard reagents, and allylsilanes at low temperature gave the r-substituted-a,b-butenolides. On the other hand, Reaction of the trans-r-oxo-a,b-unsaturated thioesters with sodium borohydride, Grignard reagents, and allylsilanes at low temperature gave the a,b-unsaturated thioesters. Reaction of the cis-r-oxo-a,b-unsaturated thioesters with silica gel gave the r-alkylidene-a,b-
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36

Wu, Pei-Tzu, and 吳佩姿. "Study the effects of Di-4-butenolidyl ether on human hepatoma and murine colorectal adenocarcinoma cells." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/31733321390065149771.

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37

Urbina-Gonzalez, Juan-Manuel [Verfasser]. "Fused and spiro furanones from tetronic acid synthons : oxa and azacycles featuring the butenolide ring / vorgelegt von Juan-Manuel Urbina-Gonzalez." 2006. http://d-nb.info/982351690/34.

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38

Chen, Yuan-Niang, and 陳媛孃. "Studies on the amino acid sequencing of abrin-aStudies on the antitumor activity of butenolid derivatives." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/8kf4xh.

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Chen, Yung-Liang, and 陳媛孃. "I. Studies on the amino acid sequencingof Abrin-a II. Studies on the antitumor activity of Butenolid derivatives." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/74321053867287303831.

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博士<br>國立臺灣大學<br>生化學研究所<br>81<br>Part I.雞母珠毒蛋白質(Abrin-a)胺基酸排列順序之研究:雞母珠毒蛋白 質 (Abrin-a of Abrus precatorius)係由A鏈與B鏈兩個次單元體所組成 。將 Abrin-a羧甲基化(Carboxylmethylation)後,A鏈以Trypsin, Chymotrypsin, Staphylococcus aureus V8 protease和Thermolysin水 解;B鏈則以Trypsin ,Chymotrypsin,Staphylococcus aureus V8 protease,Lysyl endopepti- dase和Thermolysin水解所得胜■訂出其胺 基酸排列順序。將此蛋白質胺基酸排列順序與從核■酸推測出的胺基酸排 列順序比較,發現二者不完全相同 ,顯示雞母珠毒蛋白質含有其他之異型( Isoforms)毒蛋白質。此外,比較雞母珠毒蛋白質與蓖麻子毒蛋白質( Ricin-D)的胺基酸排列順序發現其A鏈有
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40

Xavier, Nuno M. "Synthesis of new sugar derivatives containing an α, β-unsaturated carbonyl system in their structure and biological evaluation". Doctoral thesis, 2010. http://hdl.handle.net/10451/3474.

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Tese de doutoramento, Química (Química Orgânica), Universidade de Lisboa, Faculdade de Ciências, 2011<br>This PhD research work was focused on the synthesis and uses of bicyclic carbohydrate lactones, in the context of the access to new sugar derivatives containing an α,β- unsaturated carbonyl function. These molecular targets, chosen for the intrinsic bioactivity associated to the conjugated carbonyl system, were synthesized and submitted to biological evaluation, particularly their effect towards fungi and bacteria. Moreover, the inclusion of conjugated carbonyl systems in carbohydrates
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41

Reim, Stefanie [Verfasser]. "Synthese von Fluorenonen, Phthalaten, 3,5-Dioxopimelaten, halogensubstituierten Phenolen und Butenoliden durch Lewis-Säure-vermittelte Reaktionen von 1,3-Bis(silyloxy)-1,3-butadienen / vorgelegt von Stefanie Reim." 2008. http://d-nb.info/992624223/34.

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42

Yen, Yu-Mei, and 閻玉梅. "Mechanistic Studies of the Effect of Di-4-butenolidyl Ether(159A) on the Cell Death of Human Hepatoma and Murine Colorectal Adenocarcinoma Cells." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/01349330986108642605.

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