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Dissertations / Theses on the topic 'Chiral diene'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Older, Jamie Edward John. "Asymmetric induction of n4-iron diene complexes." Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368217.

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The use of tricarbonyliron chemistry in asymmetric synthesis is of increasing importance. With this comes the need for efficient and reliable techniques for the production of enantiopure starting materials. The methods currently available, although effective, are often long winded and wasteful. The development of a chiral hydride abstraction reagent analogous to the triphenylcarbenium species would be of great value in terms of improved yields and simplification of strategy. This thesis details the development of a system based around the dibenzosuberane frame-work. Two different chiral biases

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2

Ichikawa, Yoshitaka. "Synthesis of Optically Active Helical Polyacetylenes through Rhodium/Chiral Diene-Catalyzed Asymmetric Polymerization of Achiral Monomers." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142579.

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3

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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4

Okamoto, Kazuhiro. "Development of new synthetic methods of chiral diene ligands and their application to rhodium-catalyzed asymmetric addition reactions." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/126557.

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5

Nagaosa, Makoto. "Development of Chiral Tetrafluorobenzobarrelene Ligands and Kinetic Studies on the Rhodium/Diene-catalyzed Addition Reaction of Arylboron Reagents." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/158096.

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6

Otomaru, Yusuke. "Preparation of new C2-symmetric chiral diene ligands and their use for rhodium-catalyzed asymmetric addition of organoboron reagents." 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/144596.

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7

Serpier, Fabien. "Diènes chiraux dans les réactions de carbocyclisation asymétriques en cascade pour la formation d'hétérocycles azotés." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066596/document.

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Ce manuscrit présente le développement de nouvelles réactions énantiosélectives d’addition-carbocyclisation en cascade initiées par des acides boroniques pour la formation d’hétérocycles azotés chiraux. Les premiers travaux ont permis d’accéder à des pyrrolidines et des pipéridines énantioenrichies à partir d’énynes-1,6 et -1,7 possédant un alcyne en tant que point d’entrée et un ester α,β-insaturé comme seconde fonction électrophile. Une seconde réaction d’addition-carbocyclisation de céto-esters a également été mise au point pour conduire à des pipéridines chirales possédant trois centres st

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8

Selmani, Aymane. "Réactions en cascade catalysées par le rhodium : nouvelles voies d'accès à des carbocycles et hétérocycles chiraux." Thesis, Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=http://theses-intra.upmc.fr/modules/resources/download/theses/2019SORUS372.pdf.

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Ce manuscrit présente le développement de nouvelles réactions énantiosélectives d’insertion-carbocyclisation en cascade, catalysées par le rhodium(I) et initiées par les acides boroniques, pour la formation d’hétéro- et de carbocycles chiraux fonctionnalisés. Pour ces transformations asymétriques, les diènes chiraux, notamment les ligands Ar-MSBod, sont les plus adaptés et permettent d’atteindre des énantiosélectivités élevées, ce qui a conduit à la conception d’une voie alternative de synthèse de ces diènes monosubstitués. Les premiers travaux ont porté sur la préparation de cycles à cinq cha

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9

Gebauer, Markus. "Synthesis and Diels-Alder reactions of Chiral 1,3-Dienes." Adelaide, 1996. http://hdl.handle.net/2440/18734.

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10

Luo, Yunfei. "Chemoenzymatic synthesis of C2 symmetric chiral dienes for asymmetric catalysis." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539483.

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11

Clarke, Philip John. "Synthesis and Diels-Alder reaction of novel Câ‚‚-symmetric chiral dienes." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419400.

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12

Jump, Joseph M. "Synthesis and use of chiral dienes in the asymmetric diels-alder reaction." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/30292.

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13

Romano, Angela. "Synthesis and characterization of new chiral molecules: 1,2,5,8-dithiadiazecine-6,7(5H,8H)-dione derivatives." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13365/.

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The synthesis of ten-membered rings is not obvious. During this project, a new synthetic pathway was developed, which involves reaction of a benzothiazolium salt with a base and subsequent oxidation to air. The resulting ten-membered ring (1,2,5,8-dithiadiazecine-6,7(5H,8H)-dione 1) is inherently chiral because of constrained rotation about its interdependent stereogenic axes, and two enantiomers were detected and resolved by HPLC. The chiral properties of these enantiomers were studied by polarimetry, ECD spectrometry and X-ray and absolute configuration was assigned by DFT calculations. It w

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14

Yu, Jianguo. "Novel chiral phosphonium ionic liquids as solvents and catalysts for cycloadditions : investigation of the Diels-Alder reaction of a series of dienes and dienophiles in novel chiral phosphonium ionic liquids." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4307.

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The use of ionic liquids (ILs) as both reagents and solvents is widely recognised. ILs offer a number of advantages compared to regular molecular solvents. These advantages include: chemical and thermal stability, no measurable vapour pressure, no or lower toxicity, non-flammability, catalytic ability, high polarity and they can be recycled. There are a number of research groups investigating the various applications of this reaction medium and most studies have focused on solvents derived from the imidazolium cation. The use of the imidazolium-based ILs in the Diels-Alder reaction has been st

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15

Zhang, Man. "Design, synthesis, and evaluation of bioactive molecules; Chiral polyvinylpyrrolidones supported Cu/Au nanoclusters catalyzed cyclization of 5-substituted nona-1,8-dien-5-ols." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/35470.

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Doctor of Philosophy<br>Department of Chemistry<br>Duy H. Hua<br>Small molecules are of great importance in drug discovery currently. The first three chapters discussed the design, synthesis and bio-evaluation of three different classes of small molecules and exploration of their biological targets. Triacsin C analogs were designed as long chain fatty acyl-CoA synthetase (ACSL) inhibitors for attenuating ischemia and reperfusion (I/R) injury. Oxadiazole derivatives were designed as T-type calcium channel inhibitors, which have potential application in the treatment of seizure and epilepsy. Tri

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16

CHAPTAL-GRADOZ, NATHALIE. "Regio et stereoselectivite de reactions de diels-alder entre des dienes portant un substituant allylique chiral en position deux et divers dienophiles. Applications." Paris 11, 1993. http://www.theses.fr/1993PA112310.

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L'etude de la regio et de la diastereoselectivite de la cycloaddition entre des dienes substitues en position 2 par un substituant allylique chiral et divers dienophiles a constitue l'essentiel de ce travail. Si la regioselectivite des reactions thermiques ou realisees dans un milieu concentre en perchlorate de lithium n'est que moyenne en faveur du produit para disubstitue, celle-ci devient totale dans la reaction catalysee par un acide de lewis. La diastereoselectivite faciale augmente, quant a elle, avec l'encombrement sterique du groupe r porte par le diene et est inversee selon que l'on u

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17

Apte, Sandeep D. "Part I. Palladium-catalyzed silylstannylations of diynes: dynamic behavior and funtionalization of helically chiral dienes Part II. palladium-catalyzed silylstannane additions to epoxyalkynes and their titanium(III)-mediated cyclizations." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1158609567.

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18

Apte, Sandeep D. Apte Sandeep D. "Part I. Palladium-catalyzed silylstannylations of diynes dynamic behavior and funtionalization of helically chiral dienes. Part II. Palladium-catalyzed silylstannane additions to epoxyalkynes and their titanium(III)-mediated cyclizations /." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1158609567.

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19

Duvvuru, Deepti. "Development of phosphine catalyzed reactions : novel accesses to functionalized heterocycles." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112341.

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Nous effectué des réactions de cyclisations [3 +2] énantiosélectives entre des allénoates et des énones, catalyseées par des phosphines, donnant accès à des hétérocycles soufrés présentant des motifs moléculaires spirocycliques porteurs de nombreux centres asymétriques. De bons rendements chimiques et des bon excès énantiomériques ont été obtenus en utilisant le (S,S)-FerroPHANE comme le catalyseur chiral.D’autre part, nous avons développé de nouvelles réactions catalysées par les phosphines donnant accès à des hétérocycles azotés. En tenant de la réactivité des phosphines connue dans la Litté

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20

Kanazawa, Alice Misa. "Nouvelles synthèses de chaînes latérales du taxotère et du taxol et synthèses du (+ou-)- et (-)-homogynolide-A." Grenoble 1, 1994. http://www.theses.fr/1994GRE10008.

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Le taxol et le taxotere sont deux composes qui presentent des activites antitumorales assez remarquables contre plusieurs types de cancers. La synthese partielle en utilisant un produit naturel abondant et les chaines laterales correspondantes est la strategie de choix actuelle pour l'obtention de facon efficace de ces deux composes. Un des interets majeurs du laboratoire consiste a trouver de nouvelles methodes de synthese de ces chaines (surtout du taxotere) sous forme enantiomeriquement pure. Au cours de ce travail nous avons effectue, dans un premier temps, une synthese courte et directe (

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21

Pretzschner, Maria. "Sanctae modernae in diebus nostris?" Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-232683.

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Sanctae modernae in diebus nostris? - Hagiographische Konzeptionen weiblicher vita religiosa im Umfeld der Mendikanten Die Dissertationsschrift ergründet die Entwürfe weiblicher Heiligkeit im Umfeld der Bettelorden. Die Frauenviten der Mendikanten boten sich für eine vergleichende Untersuchung an, da sie eine hagiographische Neuheit darstellten, insofern ein Großteil der verehrten Frauen Laien waren. In Anbetracht dessen, dass die Mendikanten einen erheblichen Beitrag zur Moralisierung der mittelalterlichen Gesellschaft und zur Verbreitung kirchlicher Ordnungs- und Normierungskonzepte geleis

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22

Chiang, Pei-Fen, and 江佩芬. "Rh(I)/Chiral Diene Catalyzed Enantioselective Allylation of Aldimines." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/14656147597507971400.

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23

Fang, Jo-Hsuan, and 方若嫙. "Syntheses of Chiral Nitrogen-containing Molecules via Asymmetric 1,4-Addition Reactions Catalyzed by Rhodium/Chiral Diene Complexes." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/m4jpsu.

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24

Li, Jia-Wei, and 李家瑋. "Rhodium(I)/Chiral Bicyclo [2.2.1] Diene Ligands Catalyzed Enantioselective Allylation of Cyclic Ketimines." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/865624.

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碩士<br>國立臺灣師範大學<br>化學系<br>105<br>In this thesis, we focused on development new methodology to synthesize various enantioenriched α-tertiary homoallylic amines by Rhodium(I) catalyst which prepared in situ from Rh(I) catalyst precursor and chiral bicyclic [2.2.1] diene ligand L12j. Rhodium(I) complex catalyzed enantioselective 1,2-addition reactions of potassium allyltrifluo-roborates 31 with cyclic ketimines 30 was found to be highly efficient to afford the desired products with up to 99% yield, 99% ee and 5.5:1.0 dr.

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25

Li, R., Z. Wen, and Na (Anna) Wu. "A nordehydroabietyl amide-containing chiral diene for rhodium-catalysed asymmetric arylation to nitroolefins." 2016. http://hdl.handle.net/10454/17848.

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Yes<br>A highly enantioselective rhodium catalysed asymmetric arylation (RCAA) of nitroolefins with arylboronic acids is presented using a newly developed, C1-symmetric, non-covalent interacted, phellandrene derived, nordehydroabietyl amide-containing chiral diene under mild conditions. Stereoelectronic effects were studied, suggesting an activation of the bound substrate through the secondary amide as a hydrogen-bond donor.

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26

Chen, Ming-Liang, and 陳明良. "Enantioselective Arylation of Aliphatic Ketoamides Catalyzed by Rh(I) /Chiral Bicyclo [2.2.1] Diene Ligands." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/zc4xf8.

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碩士<br>國立臺灣師範大學<br>化學系<br>105<br>In this thesis, a highly enantioselective rhodium-catalyzed 1,2-addition of aryl boronic acids to aliphatic α-ketoesters and aliphatic ketoamides using Rh-catalyst comprising of a chiral bicyclic [2.2.1] diene ligand L1d is described. This transformation provides chiral tertiary alcohol products with up to 93% yield and 95% ee, product 84 is used for the concise synthesis of the VLA-4 antagonists intermediate.

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27

Zhu, Han Yang, and 祝瀚揚. "Applications of MerCO and its derivatives(VIII)new chiral ��-sulfinyl diene for asymmetric diels-alder reaction." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/77094648162249525421.

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28

Huang, Pu-Hang, and 黃普航. "Rhodium/Chiral Diene-catalyzed Enantioselective Additionof Potassium Enol Ether Trifluoroborates to N-TosylAldimines: Synthesis of (S)-Dapoxetine." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/52611925905923444581.

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29

徐志龍. "Enantioselective 1,4- Addition Reaction of Arylboronic Acids to β-nitroolefin derivatives catalyzed by Rh(I)/[2.2.1] chiral diene catalyst : Synthesis of Chiral β2-amino esters". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/85390722151386401169.

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30

Jhang, Sin-Jhih, and 張欣智. "Highly Enantioselective 1,4-Addition Reaction of Arylboronic Acids to 4-Oxobutenamides Catalyzed by Rh(I)/Chiral Diene Complexes." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/49853872138169115235.

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碩士<br>國立臺灣師範大學<br>化學系<br>102<br>This thesis describes the preparation of chiral 2,4-diaryl-4-oxobutanamindes from asymmetric conjugate addition reaction of various arylboronic acids to (E)-1-morpholino-4-arylbut-2-ene-1,4-dione 16. In the presence of 2 mol% of chiral rhodium catalyst comprising of [RhCl(C2H4)2]2 and chiral diene ligand 12e, the catalytic reaction proceeds in a high diastereoselective fashion to provide the corresponding adducts 18 with a C2-stereogenic center in up to 99% yield and >99.5% ee in EtOH using KHF2(aq) as an additive. In the synthetic application, compound 18a was

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31

Wang, Li-Hsiang, and 王立翔. "Rhodium(I)/ Chiral Diene-Catalyzed Regioselective Ring Opening of Benzocyclobutenols and Subsequent Enantioselective Insertion and Intramolecular Aldol Reaction with Diazoesters." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/56ssnd.

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碩士<br>國立臺灣師範大學<br>化學系<br>105<br>In this thesis, a Rh(I)-catalyzed regioselective ring cleavage of benzocyclobutenols 7 followed by enantioselective rhodium carbene insertion with various diazoesters 8 , and subsequent intramolecular aldol reaction via the thus obtained rhodium enolates is described. This transformation proceeds at 60 °C, in the presence 5 mol% of Rh(I) / L1C catalyst, to offer the corresponding products possessing two contiguous quaternary stereo-centers with up to 82% yield, and 95% ee.

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32

Hsu, Ching-Tai, та 許競太. "Rhodium/Diene-Catalyzed 1,4-Addition Reaction to β, β-Disubstituted α,β -Unsaturated Ketones: Enantioselective Construction of Chiral Quaternary Carbon Stereocenters". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/43964191149610954445.

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碩士<br>國立臺灣師範大學<br>化學系<br>102<br>In this thesis, a practical synthesis of optically active ketones 49 bearing a β-quaternary chiral center from asymmertric conjugated reaction of sodium tetraarylborates 48 to β,β-disubstituted α,β-unsaturated ketones is described. In the presence of 1mol% or 3mol% of rhodium catalyst in situ generated from the reaction of [RhCl(C2H4)2]2 and chiral diene ligand L2B, the asymmetric conjugate addition reaction, conducted at 80 °C in 2-methyltetrahydrofuran using MeOH as an additive, of a variety of sodium tetraarylborates 48 toβ,β-disubstituted α,β-unsaturated ket

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33

Li, Zhi-Yi, та 李治毅. "Highly Enantioselective and Regioselective Addition of Organoboron Reagents to Cyclic α,β-Unsaturated N-Sulfonyl Ketimines Catalyzed by Rh (Ι)/Chiral Diene Complexes". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ar4xa9.

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碩士<br>國立臺灣師範大學<br>化學系<br>105<br>A highly enantioselective and regioselective addition of organo boron reagents to cyclic α,β-unsaturated N-sulfonyl ketimines catalyzed by in situ generated Rh (Ι) catalyst is described. The 1,4-addition reaction of arylboronic acids proceeds with excellent regioselectivity to offer 1,4 adducts in good yields (up to 95% yield) and stereoselectivity (up to 99% ee) in the presence of Rh (Ι) catalyst. Futhermore, in the presence of Rh(Ι)/L1a the enantioselective allyation of cyclic N-sulfonyl ketimine of 21 proceeds via 1,2-addition fashion, offering the correspon

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34

TSAI, Yun-Fan, та 蔡蘊凡. "Rhodium (I)/Chiral Diene-Catalyzed Asymmetric 1,4-Addition Reaction of Aryl and Alkenyl Boronic Acids to β‑Pyrazol-1-yl Acrylates：Formal Synthesis of Ruxolitinib". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/wdxt38.

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碩士<br>國立臺灣師範大學<br>化學系<br>103<br>In this thesis, a conjugate addition reaction, catalyzed by 5 mol% of the Rh(I)/L1a, of aryl- and alkenyl-boronic acids with β-pyrazole acrylate, where the pyrazole is substituted or non-substituted, provided the corresponding addition products in 26 − 98% yield and 88 − 99% ee. The method was applied to the formal synthesis of Ruxolitinib, a Janus kinase（JAK）inhibitor that is used in the treatment of myeloﬁbrosis.

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35

潘治翰. "Asymmetric Addition of Dimethylzinc to N-Tosyl and N-Nosyl Aldimines Catalyzed by a Rhodium-Diene Complex Toward the Synthesis of Chiral 1-Arylethylamines: Enantioselective Synthesis of (S)-(-)-Salsolidine." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/20126471765721308715.

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碩士<br>國立臺灣師範大學<br>化學系<br>101<br>α-Chiral amines with Ts- or Ns-protecting groups were prepared from the asymmetric addition of dimethylzinc to N-Tosyl or N-Nosyl aldimines in the presence of Rh(I) and chiral diene ligand E. This process offers the 1,2-adducts in good yields and excellent enantioselectivities (ee value up to 99%) for various aldimines. The synthetic utility of this protocol was demonstrated in the preparation of (S)-Salsolidine.

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36

Jiang, Yao. "Enantioselective Petasis borono–Mannich reactions in the syntheses of chiral homoallylic amines, allenes and 1,4-dienes." Thesis, 2016. https://hdl.handle.net/2144/31666.

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The Petasis borono-Mannich reaction is a multicomponent condensation reaction of amines, carbonyl compounds, and boronic acids or esters to generate valuable building blocks for synthesis. Asymmetric Petasis reactions have been achieved using ligand exchange between boronic esters and chiral biphenol catalysts, providing access to optically enriched products including chiral homoallylic amines, allenes and 1,4-dienes. An asymmetric Petasis allylation reaction has been developed for the expedient, modular synthesis of enantioenriched homoallylic amines. The reaction conditions tolerate aldehy

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37

Pretzschner, Maria. "Sanctae modernae in diebus nostris?" Doctoral thesis, 2013. https://tud.qucosa.de/id/qucosa%3A30762.

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Sanctae modernae in diebus nostris? - Hagiographische Konzeptionen weiblicher vita religiosa im Umfeld der Mendikanten Die Dissertationsschrift ergründet die Entwürfe weiblicher Heiligkeit im Umfeld der Bettelorden. Die Frauenviten der Mendikanten boten sich für eine vergleichende Untersuchung an, da sie eine hagiographische Neuheit darstellten, insofern ein Großteil der verehrten Frauen Laien waren. In Anbetracht dessen, dass die Mendikanten einen erheblichen Beitrag zur Moralisierung der mittelalterlichen Gesellschaft und zur Verbreitung kirchlicher Ordnungs- und Normierungskonzepte geleis

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