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Dissertations / Theses on the topic 'Ring closing olefin metathesis'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Courtney, Anne Kathleen. "Studies of substituted olefins in ring closing olefin metathesis and approaches toward a synthesis of manzamine A /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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2

Nam, Youn Hee. "Development of Ru-Catalyzed Tandem Sequences Involving Ring-Closing Metathesis." Thesis, Boston College, 2013. http://hdl.handle.net/2345/3036.

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Thesis advisor: Marc L. Snapper<br>Tandem processes can have several advantages over multiple single step processes. Non-metathesis transformations of ruthenium alkylidenes were studied and applied to tandem processes. Ruthenium catalyzed tandem RCM/hydroacylation that allows access to tricyclic ring systems from readily available substrates was developed. Mechanistic investigations indicated that this reaction may proceed through a mechanism involving [Ru]-H species. A Ru-catalyzed tandem RCM/olefin isomerization/C-H activation sequence that provides significant advantages in terms of rapid e

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3

Xu, Chaofan. "New Ru-Based Catalysts and Strategies for Kinetically Controlled Stereoselective Olefin Metathesis:." Thesis, Boston College, 2020. http://hdl.handle.net/2345/bc-ir:109015.

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Thesis advisor: Amir H. Hoveyda<br>Chapter 1. In Situ Methylene Capping: A Key Strategy in Catalytic Stereoretentive Olefin MetathesisA general approach for in situ methylene capping that significantly expands the scope of catalyst-controlled stereoselective olefin metathesis is presented. By incorporation of stereodefined 2-butene as the capping reagent, the catechothiolate Ru complex is enabled to catalyze olefin metathesis reactions of terminal alkenes. Substrates bearing a carboxylic acid, an aldehyde, an aryl substituent, an α substituent were thus converted to the desired products in 47–

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4

Mann, Tyler J. "Stereoselective Olefin Metathesis Reactions Catalyzed by Molybdenum Monoaryloxide Monopyrrolide Complexes." Thesis, Boston College, 2016. http://hdl.handle.net/2345/bc-ir:104995.

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Thesis advisor: Amir H. Hoveyda<br>Chapter 1: Efficient Z-Selective Cross-Metathesis of Secondary Allylic Ethers Efficient Z-selective cross-metathesis of secondary allylic ethers were catalyzed by monoaryloxide monopyrrolide molybdenum complexes. Reactions involving both silyl and benzyl protected ethers were demonstrated, as well as ethers containing alkyl, aryl and alkynyl substituents. Mechanistic studies were performed, and the reactions were applied to the total synthesis of several ene-diyne natural products. Chapter 2. Stereoselective Total Synthesis of Disorazole C1 The stereoselectiv

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5

Yu, Miao. "Stereoselective Olefin Metathesis Reactions for Natural Product Synthesis." Thesis, Boston College, 2014. http://hdl.handle.net/2345/3861.

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Thesis advisor: Amir H. Hoveyda<br>Chapter 1. The first examples of highly Z- and enantioselective ring-opening/cross-metathesis reactions are disclosed. Transformations involve meso cyclic olefin substrate and styrenes or enol ethers as olefin cross partners. A stereogenic-at-Mo monoaryloxide monopyrrolide (MAP) complex, prepared and used in situ, is discovered for the efficient formation of Z olefins. Such complex, bearing a relatively smaller adamantylimido and a larger chiral aryloxide ligand, leads to kinetic Z-selectivity due to the size differential. In most cases, the resulting disubst

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6

Méndez-Andino, José Luis. "New fields in organic chemistry : developments in aqueous organoindium chemistry and ring closing olefin metathesis /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488204276534782.

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7

Chen, Zhong-Ren Kornfield Julia A. Grubbs Robert H. "I. Dynamics of block copolymer nanostructures. : II. Polymerizability of cyclic olefins and ring-closing metathesis /." Diss., Pasadena, Calif. : California Institute of Technology, 1998. http://resolver.caltech.edu/CaltechETD:etd-01242008-095827.

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8

Metaferia, Belhu B. "Synthesis of Taxol™ Analogs as Conformational Probes." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28428.

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Taxol™, isolated from the bark of Taxus brevifolia in the late 1960s, and the semisynthetic analog Taxotere™ have proven clinical importance for the treatment of ovarian and breast cancer. Taxol™ exerts its biological effect by binding to polymerized tubulin and stabilizing the resulting microtubules. Studies aimed at understanding the biologically active conformation of taxol and its binding environment on β-tubulin are described. This knowledge is important because it could lead to the design of structurally less complicated drugs with better efficacy and better bioavailability. Moreover

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9

Coe, Samuel. "Phyllostictine A ring assembly via ring closing metathesis." Thesis, University of Warwick, 2014. http://wrap.warwick.ac.uk/67101/.

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This thesis describes work focused on the chemical synthesis and herbicidal activity of the natural product phyllostictine A, a molecule of unique structure and unknown mode of action. Chapter 1 serves to introduce the natural product and describe the known activity of the natural product. Furthermore, it discusses literature methods for the construction of a-methylene-b-lactams, a key component of phyllostictine A. Chapter 2 describes work towards the construction of the macrocyclic rings found in phyllostictine A. As a result a-methylene-b-lactams have been shown, for the first time, to part

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10

Salim, Sofia Saima. "Synthesis of sulfamides using ring closing diene metathesis and enyne metathesis." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417402.

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11

Miles, Steven Malcolm. "Bio-active molecule synthesis incorporating ring-closing metathesis." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406173.

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12

Barker, William D. "Photoannulation and ring closing metathesis of carbohydrate derivatives." Thesis, University of Leicester, 2000. http://hdl.handle.net/2381/30040.

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The 'chiron approach' is a well-recognised technique for converting carbohydrates and other naturally occurring compounds into new chiral target molecules. The success of this area of chemistry can be attributed to the vast array of novel methods for transforming carbohydrates that have been developed over the last 50 years. Chapter 1 describes some of the key discoveries and pioneers within the field of carbohydrate annulation. As part of the Jenkins groups' on-going studies into the development of new methods for carbohydrate annulation, we have demonstrated the ease in which simple carbohyd

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13

Hastings, Jedidiah M. "Olefin metathesis in supramolecular and ring-opening polymerization." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0015602.

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14

Jamieson, Jennifer Yvonne 1975. "Ligand variation in molybdenum asymmetric ring-closing metathesis catalysts." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8053.

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15

Vernall, Andrea J. "Cross Metathesis and Ring-Closing Metathesis Reactions of Modified Amino Acids and Peptides." Thesis, University of Canterbury. Chemistry, 2005. http://hdl.handle.net/10092/5798.

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This thesis investigates the application of cross metathesis and ring-closing metathesis to amino acid and peptide-based substrates that are suitably modified to contain an olefin tether. Chapter One introduces olefin metathesis, describes the mechanism of cross metathesis (CM) and ring-closing metathesis (RCM), and outlines the catalysts that can be used for these transformations. The application of CM and RCM to amino acid and peptide-based systems is reviewed. Chapter Two describes the CM coupling between modified lysine- (2.34 - 2.37, 2.43), serine- (2.45, 2.46), and cysteine-based (2.48

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16

Letort, Aurelien. "Ring-closing metathesis cascade toward a formal synthesis of taxol." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6677/.

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TaxolTM and its derivatives are the largest selling anticancer drugs of all time. Numerous synthetic works and total syntheses have been published since its discovery, but to date no high yielding synthesis with less than 37 steps has been achieved. In this thesis is presented our synthetic efforts toward such a robust and efficient synthesis of Taxol. The optimisation of the Shapiro coupling fragments syntheses were investigated to enhance the robustness of our strategy. Then the C7-deoxy model ABC tricycle ring-system of Taxol, which lacks the oxygenated substituent at C7, has been efficient

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17

Okada, Toshiyuki. "Application of olefin metathesis to small ring and macromolecule synthesis." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393667.

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18

Blackwell, Helen Elizabeth Grubbs Robert H. "New synthetic applications for ring-closing metathesis and cross-metathesis employing well-defined ruthenium alkylidenes /." Diss., Pasadena, Calif. : California Institute of Technology, 1999. http://resolver.caltech.edu/CaltechETD:etd-09262005-133922.

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19

Bell, Brian Robert. "Synthesis of novel materials using ring-opening metathesis polymerisation." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295364.

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20

White, John William. "An Evans-Tishchenko/ring closing metathesis approach towards the medium ring lactone, octalactin A." Thesis, University of Edinburgh, 2006. http://hdl.handle.net/1842/11557.

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Medium-ring lactones have become important targets for synthesis as they have been isolated in an increasing number of biologically active natural products. The studies towards two 8-membered ring lactone natural products, octalactins A 1 and B 2, will be described. The first section of this thesis examines the application of key methodology (anti aldol reaction, Homer Wadsworth Emmons olefination, intermolecular Evans- Tishchenko coupling and Ring Closing Metathesis) towards the octalactins via the synthesis of a model lactone 3 (Chapter 2). The second section (Chapter 3) discusses the extens

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21

Feng, Gaofeng. "Total synthesis of 24-demethylbafilomycins using diester-tethered ring-closing metathesis /." View abstract or full-text, 2010. http://library.ust.hk/cgi/db/thesis.pl?CHEM%202010%20FENG.

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22

Astle, Christopher John. "The synthesis of tropane alkaloids using ring closing and cross metathesis." Thesis, University of Bristol, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408999.

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23

Pavlyuk, Oksana M. "Synthesis of Nitrogen-Containing Heterocycles via Carbenoid Insertion/Ring-Closing Metathesis Sequence." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1303761092.

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24

Mitchell, Lisa. "The interplay of structure and reactivity on a ring closing metathesis reaction." Thesis, University of Leicester, 2008. http://hdl.handle.net/2381/30003.

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This Thesis describes investigations of how structure affects a cyclooctannulation of a difluorinated diene via ruthenium-catalysed ring closing metathesis (RCM). The study originated in attempts to optimise these reactions towards the synthesis of novel difluorinated analogues of sugars.;A range of difluorinated dienes have been synthesised in order to study the effects of allylic protecting group on cyclisation efficiency, using the CF2 group as a probe to reaction outcomes via 19F NMR. We identified a 102 fold difference in cyclisation efficiency depending on which allylic protecting group

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25

Doodeman, Robin. "Synthesis of oxygen and nitrogen heterocycles via stabilized carbocations and ring-closing metathesis." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2002. http://dare.uva.nl/document/65801.

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26

Nelson, David James. "The interplay of structure and reactivity in ruthenium-catalysed alkene ring-closing metathesis." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=18035.

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Alkene ring-closing metathesis (RCM) has fundamentally changed the way that chemists consider the construction of molecules. However, quantitative understanding has not progressed at the same rate as synthetic application. There is still not a firm quantitative understanding of the relationship between pre-catalyst and diene structure and reaction rate or efficiency; measurements reported are typically yield measurements, which are sensitive to the work-up and isolation methods employed. Work towards a detailed quantitative understanding of the interplay between structure and reactivity is pre

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27

Wybrow, Robert Anthony James. "Investigations towards the synthesis of (-)-histrionicotoxin via a tandem ring closing metathesis technique." Thesis, University of Sheffield, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419328.

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28

Margue, Robert Germain. "Mechanistic investigations of enyne ring-closing metathesis reactions catalysed by ruthenium based systems." Thesis, University of Bristol, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431634.

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29

Basu, Kallol. "New aspects in ring closing metathesis reactions studies toward the synthesis of mangicol A." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1093973365.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xviii, 228 p.; also includes graphics. Includes bibliographical references (p. 128-137).

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30

Edwards, Andrew. "The application of tandem ring closing metathesis : studies towards the total synthesis of (-)-histrionicotoxin." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269348.

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31

Mak, Xiao Yin. "Tandem benzannulation-ring closing metathesis strategy for the synthesis of benzo-fused nitrogen heterocycles." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/46034.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2008.<br>Vita.<br>Includes bibliographical references.<br>A tandem benzannulation-ring closing metathesis strategy for the efficient synthesis of benzo-fused nitrogen heterocycles such as dihydroquinolines, benzazepines, and benzazocines has been developed. This strategy is based on the benzannulation reaction of ynamides with cyclobutenones or [alpha]-diazo ketones to generate highly-substituted aniline derivatives, which then participate in ring-closing metathesis reactions to form nitrogen heterocycles. The syntheti

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32

Wu, Xiao. "New routes to 2,5-disubstituted tetrahydropyrans and P-stereogenic heterocycles via ring-closing metathesis." Thesis, University of York, 2013. http://etheses.whiterose.ac.uk/4494/.

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New methodologies have been developed for the synthesis of 2,5-disubstituted tetrahydropyrans and for the asymmetric synthesis of P-stereogenic phospholene boranes. Synthesis of 2,5-disubstituted tetrahydropyrans in a racemic fashion was achieved via Grignard addition, O-alkylation, ring-closing metathesis and hydrogenation. Using this route, seven potential perfumery compounds were produced in good overall yield. Olfactory evaluation of the potential perfumery molecules accessed the majority of products as having a predominant characteristic of citrus note and others having a floral note. In

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33

Dorgan, Philip D. "An Evans-Tishchenko/ring-closing alkyne metathesis approach towards the synthesis of Disorazole C₁." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/13692.

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34

Kavitake, Santosh. "A synergy between well-defined homogeneous and heterogeneous catalysts : the case of Ring Opening - Ring Closing Metathesis of cyclooctene." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10211/document.

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Dans le cadre de la formation sélective d'oligomères cycliques à partir du cyclo-octène, des matériaux hybrides organiques-inorganiques mésostructurés bien-définis contenant les unités Ru-NHC dissymétriques le long des canaux poreux de leur matrice de silice ont été développés et caractérisés à un niveau moléculaire. Tous les systèmes obtenus ont montré des fortes activités et sélectivités en oligomères cycliques (dimères : 50% et trimères : 25%) en RO-RCM du cyclo-octène, contrairement aux complexes homogènes Ru-NHC analogues symétriques (G-II et GH-II), qui conduisent préférentiellement à la

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35

Satcharoen, Vachiraporn. "The ring-closing metathesis of vinyl fluoro- and bromo-containing dienes synthesis of (Â±)-deoxygalanthamine." Thesis, University of Southampton, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430673.

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36

Moriggi, Jean-Dominique Francois Michel. "Solid-phase synthesis of cyclic sulfonamides and sulfamides employing a ring-closing metathesis cleavage strategy." Thesis, London South Bank University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342638.

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37

Alexander, John Bryson 1972. "Chiral molybdenum and tungsten imido alkylidene complexes as catalysts for asymmetric ring-closing metathesis (ARCM)." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/44898.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.<br>Includes bibliographical references (leaves 172-179).<br>Chapter 1. The synthesis and resolution of sterically encumbered biphenols is presented. -- Chapter 2. The synthesis of molybdenum(VI) imido alkylidene complexes containing racemic and optically pure biphenoxides (Biphen and Biad) is reported. -- Chapter 3. The 1H NMR spectroscopic data for molybdenum(VI) imido alkylidene biphenoxide complexes prepared in Chapter 2 are presented. -- Chapter 4. The application of catalysts prepared in Chapter 2 in asymmetr

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38

Marleau-Gillette, Joshua. "Studies of Metathesis for Materials Applications: Present and Future Possibilities." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23702.

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Compounds containing multiple metal-carbon bonds are now widely used as catalysts for organic and materials synthesis. Among such transformations, olefin metathesis (OM) occupies a position of pre-eminent significance. Alkyne metathesis holds great promise, but remains in a much lower state of development. The OM-directed work in this thesis sought to advance the state of the art in living, Ru-catalyzed ringopening metathesis polymerizations (ROMP). Currently, the first- and third-generation Grubbs initiators, which exhibit the ease of handling characteristic of the late metal ruthenium, domin

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39

Wang, Yikai. "Studies on Application of Silyl Groups in Ring-Closing Metathesis Reactions and Fragment-Based Probe Discovery." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10115.

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In efforts to search for tool compounds that are capable of probing normal and disease-associated biological processes, both quality and identity of the screening collection are very important. Towards this goal, diversity-oriented synthesis (DOS) has been explored for a decade, which aims to populate the chemical space with diverse sets of small molecules distinct from the traditional ones obtained via combinatorial chemistry. In the practice of DOS, macrocyclic ring-closing metathesis (RCM) reactions have been widely used. However, the prediction and control of stereoselectivity of the react

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40

Cayir, Merve. "Synthesis Of Chiral Diene Systems Via Ring Closing Enyne Metathesis And Their Applications In Diels-alder Reactions." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12612149/index.pdf.

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The main subject of this thesis is synthesis of chiral diene systems via Ring Closing Enyne Metathesis (RCEM). Furan and thiophene carbaldehydes were chosen as starting compounds. As a result of allylation and propargylation reaction of these aldehydes targeting racemic heteroaryl substituted homoallylic and homopropargylic alcohols were synthesized. Enantiomerically enriched alcohols were obtained by enzymatic resolution method with different enzymes (PS-II, Lipozyme) with the high enantiomeric excess values. Absolute configurations of all alcohols are known. O-allylation and O-propargylation

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41

Liu, Shiqi. "Mechanical Generation of Depolymerizable Poly(2,5-dihydrofuran)." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1619002348147551.

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42

Zunic, Valentin B. "Diastereoselective ring closing metathesis as an approach to cycloalkenes and symmetrical bicyclodienes and their functionalization through desymmetrization reactions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58764.pdf.

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43

Salvador, Mayra Beloti. "Estudos visando a elucidação estrutural de uma diidro-2H-piranona natural." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249254.

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Orientador: Ronaldo Aloise Pilli<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-10T13:11:39Z (GMT). No. of bitstreams: 1 Salvador_MayraBeloti_M.pdf: 2010457 bytes, checksum: 350e267c8a65621fe41d0da941852b62 (MD5) Previous issue date: 2007<br>Resumo: Esta dissertação de mestrado trata da síntese da Criptomoscatona D2, uma lactona isolada pelo grupo de pesquisa dos Profs. Cavalheiro e Yoshida a partir da Cryptocarya moschata, planta encontrada em território brasileiro, cujas configurações relativa e absoluta ainda não

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44

Foley, Anne M. "Studies in alkene selective ring-closing metathesis and chromium(II)-mediated E-alkenylstannylation : a formal synthesis of (-)-periplanone-B." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302063.

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45

Stengel, Jason H. "The Application of Tandem O-H Insertion/Ring-Closing Metathesis to the Synthesis of Unsaturated Cyclic Ethers: Approaches to Rogioloxepane and Isolaurepinnacin." Ohio : Ohio University, 2010. http://www.ohiolink.edu/etd/view.cgi?ohiou1260473764.

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46

Goldring, William Peter Donald. "Application of ring-closing metathesis to the synthesis of unsaturated 14-membered lactams and the marine alkaloids motuporamines A-C." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0018/NQ56551.pdf.

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47

Cusak, Alen. "Temporary silicon-tethered ring-closing metathesis approach to polyketide fragments : Asymmetric synthesis of the C1-C30 fragments of amphidinol 3." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511068.

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48

Demirci, Sema. "Synthesis Of Heteroaryl Substituted Dihydrofuran And Dihydropyran Derivatives By Green Chemistry Approach." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610966/index.pdf.

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The thesis subject is mainly involved in Green Chemistry approach. Thiophene, furan and pyridine carboxaldehydes were chosen as starting compounds and vinylation and allylation with Grignard reaction afforded the corresponding racemic heteroaryl substituted allylic and homoallylic alcohols. Subsequent resolution with enzymes (PS-Amano II, Lipozym and Novazym 435) gave enantiomerically enriched alcohols with the e.e. values varied between 65 and 99%. The absolute configurations of all substrates are known. As a result of O-allylation with the common procedure formed the feasible carbon backbone

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49

Sieng, Bora. "Synthesis of six- and seven-membered cyclic ethers by ring-closing metathesis and synthesis of the A-D fragment of gambieric acid A." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/2523/.

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Over the past thirty years, numerous fused polycyclic ether natural products have been isolated from small marine organisms. These compounds revealed a variety of interesting biological properties, which has attracted the interest of many synthetic groups. The common structural characteristic of these compounds is an array of trans-fused ether rings. Several iterative strategies have been reported to build six- and seven-membered cyclic ethers, which are the two most common units in these natural products. The objective of work described in the first part of this thesis was to develop new synt

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50

Parulekar, Sumedh. "A novel approach to manipulate cavity size In resorcinarenes." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001810.

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