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Dissertations / Theses on the topic 'Regioselective synthesis'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Harrington, Keith Anthony. "Regioselective synthesis of functionalised pyridines." Thesis, University of Leeds, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329948.

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2

Xu, Daiqiang. "Regioselective Synthesis of Cellulose Derivatives." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/38830.

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Cellulose is the most abundant polysaccharide on earth and it is relatively a simple homopolymer with three hydroxyl groups, differing only subtly in reactivity. The position of substitution has a powerful influence on physical properties of cellulose derivatives. To better understand the structure and property relationships of cellulose derivatives, it is critical to have all homopolymers related to important cellulose ethers and esters available. However, regiocontrol in cellulose chemistry is still a difficult, mostly unconquered frontier. In this dissertation, the main objective is to deve

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3

Zheng, Xueyan. "Regioselective Synthesis of Cellulose Esters." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/49540.

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Cellulose is an extraordinarily abundant polymer that can be harvested and purified from trees and other renewable sources. Cellulose derivatives have been widely used as coatings, optical films, fibers, molded objects, and matrices for controlled release. The properties of cellulose derivatives are not only affected by the degree of substitution, but also by the position of substitution. In order to establish the structure-property relationships of cellulose derivatives, it is of great importance to impart regioselectivity into functionalized cellulose. However, regioselective substitution of

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4

Zhang, Ruoran. "Regioselective synthesis of curdlan derivatives." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/64374.

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Curdlan, a (1,3)-linked linear homopolysaccharide composed of beta-D-glucan, is produced by the bacterium Alcaligenes faecalis var. myxogenes. Several strategies to synthesize chemically modified curdlan derivatives have been reported, but there have been few reports of regioselective functionalization at specific positions of the curdlan backbone, especially of aminated curdlan derivatives which have remarkable potential in biomedical and pharmaceutical applications. We demonstrate herein the design, synthesis and characterization of a family of regioselectively aminated curdlan derivatives i

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5

Gao, Chengzhe. "Regioselective Synthesis of Glycosaminoglycan Analogs." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/104865.

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Glycosaminoglycans (GAGs), a large family of complex, unbranched polysaccharides, display a variety of essential physiological functions. The structural complexity of GAGs greatly impedes their availability, thus making it difficult to understand the biological roles of GAGs and structure-property relationships. A method that can access GAGs and their analogs with defined structure at relatively large scales will facilitate our understandings of GAG biological roles and biosynthesis modulation. Cellulose is an abundant and renewable natural polymer. Applications of cellulose and cellulose deri

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6

Liu, Shu. "Regioselective Synthesis of Polysaccharide-based Polyelectrolytes." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/91194.

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Polysaccharides are one of the most abundant and diverse families of natural polymers, and have an incredibly wide range of natural functions including structural reinforcement, energy storage, aqueous rheology modification, and communication and identity. Application of native polysaccharides like cellulose as sustainable materials is limited by some inherent drawbacks such as insolubility in common solvents including water, and poor dimensional stability. To increase their functionality and utility, researchers have sought to tailor the chemical and physical properties of cellulose and other

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7

Haliloglu, Cansu. "Synthesis and regioselective functionalization of a trihalogenated pyridone." Thesis, Umeå universitet, Kemiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105536.

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8

Fox, Stephen Carter. "Regioselective Synthesis of Novel Cellulose Derivatives for Drug Delivery." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77263.

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New methods were developed for the regioselective synthesis of new classes of cellulose derivatives with properties that could help improve the delivery of pharmaceutical drugs within the human body. The specific synthetic targets of this research were regioselectively carboxylated and regioselectively aminated cellulose derivatives. While different avenues to the carboxylated cellulose were ultimately explored without success, a new method for the synthesis of selectively <i>O</i>-acylated 6-amino-6-deoxy-cellulose esters was devised. A key reaction that enabled the synthesis of the new cell

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9

Kim, Young-Jin. "Regioselective synthesis of functional phenolic polymers and their applications." 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/145356.

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10

Hassan, Hassan Abbas. "Partial synthesis and regioselective reduction of steroidal 11,12-seco-dioic anhydrides." Thesis, University of Glasgow, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281225.

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11

Wasserthal, Lennard [Verfasser], and Andreas [Akademischer Betreuer] Hirsch. "Regioselective synthesis of multifullerenes with tuneable solvent affinities / Lennard Wasserthal. Gutachter: Andreas Hirsch." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2014. http://d-nb.info/1065004982/34.

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12

Levesque, Patrick Pierre. "Development of New Biarylphosphane Coinage Metal Complexes for the Regioselective Synthesis of Fused Carbocycles." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23367.

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In the last century, no less than five nobel prizes have been awarded for the construction of carbon-carbon bonds : The Grignard reaction (1912), the Diels-Alder reaction (1950), the Wittig reaction (1979), Olefin metathesis (2005) and palladium cross-coupling reactions (2011). The latter two are transition metal catalyzed transformations and their impact on the synthesis of pharmaceutically active compounds, bulk chemicals, fine chemicals, high tech materials as well as agricultural chemicals has been phenomenal. These reactions have changed the way the scientific community views the science

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13

Wang, Yunhui [Verfasser], Thomas [Akademischer Betreuer] Heinze, and Dieter [Akademischer Betreuer] Klemm. "Synthesis and characterisation of regioselective cellulose derivatives / Yunhui Wang. Gutachter: Thomas Heinze ; Dieter Klemm." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2013. http://d-nb.info/1035637855/34.

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14

VIRELLI, MATTEO. "Pd-Catalyzed regioselective C-H activation for the synthesis of potentially biologically active compounds." Doctoral thesis, Università degli studi di Pavia, 2019. http://hdl.handle.net/11571/1251271.

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Al giorno d’oggi, risulta importante sviluppare nuovi approcci sintetici che permettono di superare i comuni metodi di formazione del legame C-C. In questo lavoro di tesi ci si è concentrati sullo sviluppo di strategie regioselettive di C-H activation per la sintesi e la funzionalizzazione di molecole potenzialmente biologicamente attive.<br>Nowadays, it is important to develop new synthetic approaches to overcome the common methods of C-C bond formation. This thesis is focused on the development of regioselective C-H activation strategies for the synthesis and functionalization of potentially

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15

VIRELLI, MATTEO. "Pd-Catalyzed regioselective C-H activation for the synthesis of potentially biologically active compounds." Doctoral thesis, Università degli studi di Pavia, 2019. http://hdl.handle.net/11571/1251311.

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Al giorno d’oggi, risulta importante sviluppare nuovi approcci sintetici che permettono di superare i comuni metodi di formazione del legame C-C. In questo lavoro di tesi ci si è concentrati sullo sviluppo di strategie regioselettive di C-H activation per la sintesi e la funzionalizzazione di molecole potenzialmente biologicamente attive.<br>Nowadays, it is important to develop new synthetic approaches to overcome the common methods of C-C bond formation. This thesis is focused on the development of regioselective C-H activation strategies for the synthesis and functionalization of potentially

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16

VIRELLI, MATTEO. "Pd-Catalyzed regioselective C-H activation for the synthesis of potentially biologically active compounds." Doctoral thesis, Università degli studi di Pavia, 2019. http://hdl.handle.net/11571/1251351.

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Al giorno d’oggi, risulta importante sviluppare nuovi approcci sintetici che permettono di superare i comuni metodi di formazione del legame C-C. In questo lavoro di tesi ci si è concentrati sullo sviluppo di strategie regioselettive di C-H activation per la sintesi e la funzionalizzazione di molecole potenzialmente biologicamente attive.<br>Nowadays, it is important to develop new synthetic approaches to overcome the common methods of C-C bond formation. This thesis is focused on the development of regioselective C-H activation strategies for the synthesis and functionalization of potentially

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17

Pereira, Junia M. "Synthesis of New Pullulan Derivatives for Drug Delivery." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23884.

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Pullulan is a non-ionic water-soluble polysaccharide which is produced from starch by the yeast-like fungus Aureobasidium pullulans. Pullulan is known for its non-toxicity and biocompatibility. Most pullulan modifications are intended to reduce its water solubility or to introduce charged or reactive groups for functionality. Polysaccharides that have been hydrophobically modified and contain carboxyl groups are commonly used in drug delivery systems because of their ability to provide pH-controlled drug release. We demonstrated in this dissertation the regioselective synthesis of a range of 6

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18

Sharma, B. "Design and tactics towards synthesis of 10 & 14-membered macrocyclic lactones and lewis acid mediated regioselective C-C bond formation." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2017. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/4264.

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The thesis hereby presents a unique perspective for retrosynthetic design and state-of-the-art strategies towards enantioselective synthesis of 10 and 14-membered macrolactones, along with the development of Lewis acid mediated scalable methods for C−C bond formation.<br>CSIR-SRF<br>AcSIR

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19

Dong, Hai. "Efficient carbohydrate synthesis by controlled inversion strategies." Licentiate thesis, Stockholm : Chemical Science and Engineering, KTH, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4179.

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20

Chung, Nga-wai, and 鍾雅慧. "Applications of regioselective intramolecular oxidation by dioxirane generated in situ: stereoselective synthesisof substituted tetrahydropyrans and fluorescence probes forperoxynitrite." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B45014735.

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21

Heard, Kane. "Novel polyaromatics for organic electronics and graphene exfoliation : synthetic approaches utilising regioselective aromatic C-H borylation." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/novel-polyaromatics-for-organic-electronics-and-graphene-exfoliation-synthetic-approaches-utilising-regioselective-aromatic-ch-borylation(f8cd1879-521e-41f6-8a3c-2af7add7844b).html.

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Projects were undertaken investigating the functionalisation of polyaromatic cores (chrysene, pyrene and perylene) for use in organic electronics and aqueous graphene stabilisation. In each case an iridium-catalysed aromatic C-H borylation formed a key synthetic step, allowing access to unique substitution patterns. The development of strategies for the orthogonal and asymmetric functionalisation of polyaromatic hydrocarbons was explored. In a key synthetic step 4,10-dichlorochrysene was regioselectively borylated in high yields at the 2,8-positions though C-H activation chemistry. The subsequ

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22

De, Francesco Laura. "Towards the total synthesis of a potential M1 muscarinic agonist and study on regioselective cyclisations for the synthesis of highly substituted piperazinones." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/56087/.

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The preparation of piperazinones, which are important pharmacophores, is reviewed in the introduction. This thesis provides an elucidation of the cyclisation mechanisms involving chiral secondary 1,2-diamines both with haloacetates and with 1,2-dicarbonyl compounds. The work on selective cyclisations consists of mainly three parts: (i) Regioselective preparation of N.W-disubstituted 5- and 6-piperazinones with elucidation of the cyclisation mechanism using D2O and C label (ii) Regioselective preparation of W-dibenzyl 3,6- and 3,5-disubstituted piperazinones using methyl a-bromophenylacetate, m

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23

Gmehling, Alexander [Verfasser], and Andreas [Akademischer Betreuer] Hirsch. "Regioselective Synthesis of C60-Tris- and Hexakisadducts with C3v-Symmetrical Phosphate Trismalonate Addends / Alexander Gmehling. Betreuer: Andreas Hirsch." Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2013. http://d-nb.info/1033029939/34.

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24

Papaianina, Olena [Verfasser], Konstantin [Akademischer Betreuer] Amsharov, and Andriy [Gutachter] Mokhir. "Synthesis of Functional Buckybowls and Related Nanostructures via Regioselective Cyclodehydrofluorination / Olena Papaianina ; Gutachter: Andriy Mokhir ; Betreuer: Konstantin Amsharov." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2020. http://d-nb.info/1203879113/34.

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25

Wu, Guanmin. "Synthesis and Characterization of 2,3-Dichloropyrrolo[1,2-a]benzimidazol-1-one and Its Methylthiol Derivatives." Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5238/.

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Condensation of 2,3-dichloromaleic anhydride and o-phenylenediamine in refluxing toluene affords the three compounds 2,3-dichloro-N-o-C6H4(NH2)maleimide (1), N,N¢-o-C6H4-bis(2,3-dichloromaleimide) (2), and 2,3-dichloropyrrolo[1,2-a]benzimidazol-1-one (3), with compound 1 as the major product. Repeating the same reaction in the presence of added PTSA furnishes compound 3 as the major product. Treatment of 3 with methylthiol in the presence of pyridine affords monosulfide compounds 2-chloro-3-methylthiopyrrolo[1,2-a]benzimidazol-1-one (4) and and the disulfide derivatives 2,3-di(methylthio)pyrro

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26

Thomas, Claudia, Olga Kataeva, Arndt W. Schmidt, and Hans-Joachim Knölker. "Regioselective prenylation of bromocarbazoles by palladium(0)-catalysed cross coupling – synthesis of O-methylsiamenol, O-methylmicromeline and carquinostatin A." Royal Society of Chemistry, 2014. https://tud.qucosa.de/id/qucosa%3A36279.

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We describe the regioselective prenylation of 3-bromocarbazole by palladium(0)-catalysed cross coupling with a prenylstannane or a prenylboronate. The procedure is applied to the synthesis of precursors for biologically active carbazole alkaloids.

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27

Ravi, G. R. "Stereoselective synthesis of α-hydroxy acids and investigation of steric and electronic controls in the regioselective formylation of arenes". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1997. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3267.

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28

Chung, Nga-wai. "Applications of regioselective intramolecular oxidation by dioxirane generated in situ : stereoselective synthesis of substituted tetrahydropyrans and fluorescence probes for peroxynitrite /." View the Table of Contents & Abstract, 2004. http://sunzi.lib.hku.hk/hkuto/record/B30575618.

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29

Ma, Zhiwei. "Progress Towards the Total Synthesis of Yaku'amide A." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/6002.

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The synthetic progress towards yaku'amide A is described. The study leads to development of new synthetic methodologies. Base-free regioselective aminohydroxylation is convenient to deliver β-tert-hydroxyamino acids. A sequence consisting of alkylative esterification, Martin sulfurane mediated anti dehydration, a tandem azide reduction-O→N acyl transfer allows the rapid access of E- and Z-dehydroisoleucine-containing peptides from β-tert-hydroxyisoleucine derivatives. Those methods are effective in constructing complicated peptides and advanced subunits of yaku'amide A.

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30

Frigell, Jens. "Synthesis of O-linked Carbasugar Analogues of Galactofuranosides and N-linked Neodisaccharides." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-43561.

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In this thesis, carbohydrate mimicry is investigated through the syntheses of carbohydrate analogues and evaluation of their inhibitory effects on carbohydrate-processing enzymes. Galactofuranosides are interesting structures because they are common motifs in pathogenic microorganisms but not found in mammals. M.tuberculosis, responsible for the disease tuberculosis, has a cell wall containing a repeating unit of alternating (1→5)- and (1→6)-linked β-D-galactofuranosyl residues. Synthetic inhibitors of the enzymes involved in the biosynthesis of the cell wall could find great therapeutic use.

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31

Gali, Meghanath. "Synthesis of Small Molecule Inhibitors of Janus Kinase 2, Phosphodiesterase IV, GABAA and NMDA receptors: Investigation of Mcmurry, Mannich and Chemoenzymatic Strategies." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3110.

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Stilbenoids possess a wide range of biological properties such as, anticancer, antiplatelet aggregation, antiestrogenic, antibacterial, antifungal and antiatherogenic, etc. Owing to these therapeutic values, a great deal of attention attracted in the synthesis of derivatives of stilbenes. During the course of the study, G6 a novel stilbenoid was discovered, through high throughput screening, to be a potent inhibitor of mutated JAK2-V617F. The mutated JAK2 variant has been implicated in various myeloproliferative disorders (MPDs) including polycythemia vera (PV), essential thrombocythemia (ET)

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32

Marshall, Laura J. "Novel methodology for the synthesis of ¹³C-Labelled phenols and its application to the total synthesis of polyphenols." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/875.

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The base-catalysed reaction of 4H-pyran-4-one with a range of nucleophiles, namely diethyl malonate, ethyl acetoacetate, nitromethane, acetylacetone and ethyl cyanoacetate, was developed as a reliable, high yielding method for the preparation of para-substituted phenols. The methodology was extended to include the use of the substituted pyranones, maltol, 2,6-dimethyl-4H-pyran-4-one and diethyl chelidonate. Reactions were studied using conventional heating methods and microwave irradiation. Microwave irradiation had definite beneficial effects, with improved yields, reduced reaction times and

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33

Holmberg, Pär. "Synthesis of Molecular Probes for Exploring the Human Consciousness, 5-HT7 Ligands and Salvinorins." Doctoral thesis, Uppsala universitet, Institutionen för läkemedelskemi, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4824.

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In this study, we have addressed the serotonergic and the opioid system within the CNS. Both systems are of outmost importance in the etiology of disease states, especially mental disorders. In our investigation of the serotonergic system, we have synthesized novel enantiomerically pure 6-aryl-3-amino- and 8-aryl-3-aminochromans as ligands for the 5-HT7 receptor. One reason for the lack of understanding of the physiological functionality of the serotonin 5-HT7 receptor, the most recently discovered member of the serotonin receptor family, is the absence of partial agonists and agonists. In th

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34

Holmberg, Pär. "Synthesis of Molecular Probes for Exploring the Human Consciousness, 5-HT₇ Ligands and Salvinorins." Doctoral thesis, Uppsala University, Department of Medicinal Chemistry, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4824.

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<p>In this study, we have addressed the serotonergic and the opioid system within the CNS. Both systems are of outmost importance in the etiology of disease states, especially mental disorders. </p><p>In our investigation of the serotonergic system, we have synthesized novel enantiomerically pure 6-aryl-3-amino- and 8-aryl-3-aminochromans as ligands for the 5-HT<sub>7</sub> receptor. One reason for the lack of understanding of the physiological functionality of the serotonin 5-HT<sub>7</sub> receptor, the most recently discovered member of the serotonin receptor family, is the absence of parti

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35

Dharap, Y. V. "Facile synthesis of aziridines using copper hydrotalcite under microwave irradiation; synthesis of 3-substituted2(1h)-quinolinones catalyzed by hydrotalcite like anionic clays; rearrangement of α-pinene epoxide to campholenic aldehyde with modified beta zeolite catalyst and regioselective nitration of phenols with new phosphorus based ionic liquids". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2008. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2633.

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36

Spangenberg, Petra. "Alpha-galactosidases et synthese regioselective d'oligosaccharides." Nantes, 2000. http://www.theses.fr/2000NANT2036.

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Les polyosides, du fait de leur implication dans les reactions immunologiques presentent de nombreuses applications therapeutiques. La synthese de ces composes est importante parce qu'il est rarement possible de les extraire du milieu naturel du fait de leur faible abondance. La synthese regioselective de ces composes par voie chimique est souvent delicate du fait du grand nombre d'etapes de protection-deprotection necessaires. Les enzymes par la selectivite de leur action peuvent contribuer a l'avenement de methodologies reduisant considerablement l'ensemble de ces manipulations. Les glycosyl

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37

van, der Mei Farid Willem. "Proton-Activated Catalysts for Efficient and Practical Enantioselective Syntheses." Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:108140.

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Thesis advisor: Amir H. Hoveyda<br>A previously developed catalytic system which can catalyze a variety of efficient and enantioselective allyl additions has been expanded to include regio-, diastereo-, Z-, and enantioselective crotyl addition reactions. As discussed in Chapter 1, we were able to carry out efficient crotyl additions to N-phosphinoyl imines by discovering a sufficiently Lewis acidic co-catalyst, zinc(II) methoxide. This finding enabled us to vastly improve reaction efficiency, in addition to enabling a 1,3-borotropic shift during the course of the reaction, turning a previously

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38

Grimster, Neil Patrick. "New strategies for chemical synthesis : 1) Development of a palladium-catalyzed direct C-H alkenylation of indoles by solvent-controlled regioselective C-H bond functionalisation; 2) Studies towards the development of a catalytic diastereoselective [3,3] sigmatropic rearrangement at ambient temperature." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612869.

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39

Rhee, Jong Uk. "Part I. Synthesis of n-heterocyclic furanosides and pyranosides via 5- or 6-exo-trig-radical cyclization. Part II. (a) Palladium catalyzed silystannylative cyclization of diynes and allenynes. (b) Regioselective Diels-Alder reaction of vinylsilane and its application to Papulacandin D core structure." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1078850581.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xx, 456 p.; also includes graphics Includes bibliographical references (p. 449-456). Available online via OhioLINK's ETD Center

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40

ROBERTI, CAROLINE. "Synthese regioselective de thioethers, d'ethers et d'esters derives d'alditols." Amiens, 1999. http://www.theses.fr/1999AMIE0104.

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Dans le cadre de la fonctionnalisation directe et regioselective d'alditols en position primaire, nous nous sommes plus particulierement interresses a la bromation, la thioetherification, l'etherification et l'esterification. Tout d'abords, la bromation regioselective d'alditols (d-arabinitol, xylitol, ribitol, d-glucitol and d-mannitol) a ete realisee avec le bromure d'acetyle dans le dioxane. Les derives ,-dibromodidesoxyalditols ont ete isoles apres acetylation avec de bons rendements (51-80%). Les derives ,-dithioalkylalditols sont ensuite synthetises a partir des derives ,-dibromoalditols

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41

Scarassati, Aline Utaka. "Estudos visando a síntese total do Raputindol D e alquinilação eletrofílica de cetonas e aldeídos com iodo hipervalente." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-12122018-094956/.

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Na primeira parte da tese foram abordadas diversas rotas sintéticas para a preparação dos fragmentos nordeste e sudoeste do alcaloide bisindólico Raputindol D, cuja síntese total nunca foi descrita. A proposta inicial era obter o fragmento nordeste em 13 etapas a partir do composto comercial 3-metil-4-nitrofenol, utilizando como etapas-chave uma reação de Diels-Alder, uma abertura redutiva de anel e uma contração de anel com iodo(III). Empregando uma reação de Diels-Alder regiosseletiva de um intermediário silil substituído, a construção de uma unidade tricíclica linear foi alcançada com a obt

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42

Kondo, Tetsuo. "SYNTHESIS OF REGIOSELECTIVERY SUBSTITUTED CELLULOSE DERIVATIVES AND THEIR PHYSICOCHEMICAL PROPERTIES." Kyoto University, 2000. http://hdl.handle.net/2433/151514.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである<br>Kyoto University (京都大学)<br>0048<br>新制・論文博士<br>博士(工学)<br>乙第10451号<br>論工博第3527号<br>新制||工||1187(附属図書館)<br>UT51-2000-J63<br>(主査)教授宮本武明, 教授澤本光男, 教授堀井文敬<br>学位規則第4条第2項該当

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43

Kurahashi, Takuya. "Molecular Recognition and Regioselective Functionalization of Carbohydrates by Synthetic Host Molecules." Kyoto University, 2000. http://hdl.handle.net/2433/157078.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第8342号<br>工博第1907号<br>新制||工||1168(附属図書館)<br>UT51-2000-F246<br>京都大学大学院工学研究科合成・生物化学専攻<br>(主査)教授吉田潤一, 教授北川進, 教授森島績<br>学位規則第4条第1項該当

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44

Frischmuth, Annette Dorothee Sophie [Verfasser], and Paul [Akademischer Betreuer] Knochel. "New preparation of functionalized indoles and azaindoles via an intramolecular copper-mediated carbomagnesiation of ynamides,regioselective in situ trapping metalation of arenes and heteroarenes with TMPLi in the presence of metal salts and synthesis of SF5-substituted aromatics and heterocycles / Annette Dorothee Sophie Frischmuth. Betreuer: Paul Knochel." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://d-nb.info/1110749678/34.

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Arnaout, Abdulkarim al. "Synthese regioselective de dihydropyridines et de pyridines 2- ou 4-fonctionnalisees : applications." Poitiers, 1987. http://www.theses.fr/1987POIT2254.

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MASHONDI, MOHAMED. "Synthese regiospecifique et regioselective d'aminosaccharides et de piperazino-saccharides a visee therapeutique." Amiens, 1996. http://www.theses.fr/1996AMIE0105.

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Ce travail decrit la synthese de deux familles d'aminosaccharides a visee therapeutique. La premiere gamme comprend des derives du d-galactose, du d-glucose, du d-xylose et du xylitol, sur lesquels ont ete greffes par l'intermediaire d'une jonction aminee, soit une chaine n-alkyle soit un groupement phenylalkyle. Trois methodes ont ete utilisees, sur le site anomerique ; condensation d'une amine primaire, sur les sites primaires : greffe du nh#3 ou de rnh#2 apres activation, sur les sites secondaires, d'abord preparation d'un aminosaccharide selon la sequence suivante, activation, azidation, r

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47

DA, SILVA GOES ALEXANDRE JOSE. "Synthese regioselective photocatalysee par transfert monoelectronique de 2-cyano-3-alkylethylidenepiperidines. Syntheses de la cis-eburnamonine, de la deplancheine et de l'ellipticine." Paris 6, 1995. http://www.theses.fr/1995PA066208.

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La photosensibilisation redox par transfert monoelectronique des amines tertiaires, nouveau mode de preparation d'ions iminiums, a ete utilisee pour realiser la synthese regioselective de nouveaux synthons cyanes: les 2-cyano-3-alkylethylidenepiperidines. Ces derniers sont obtenus, dans des conditions tres douces et avec de bons rendements, a partir de 3-alkylethylidenepiperidines. Ces synthons cyanes ont ete utilise dans la synthese de trois alcaloides indoliques connus. Ainsi, la synthese stereoselective de la cis-eburnamonine a ete realisee par l'intermediaire d'une indoloquinolizidine cle

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48

CAVALCANTI, DE AMORIM ELBA LUCIA. "Synthese regioselective photocatalysee par transfert monoelectronique de 2-cyano-1,2,5,6-tetrahydropyridines. Utilisation dans la synthese d'alcaloides indoloquinolizidiniques." Paris 6, 1994. http://www.theses.fr/1994PA066522.

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Le but de ce travail etait d'evaluer l'interet de la photocatalyse par transfert monoelectronique dans la synthese d'alcaloides indoloquinolizidiniques. Cette methode a permis la preparation regioselective, en une seule etape, des synthons cyanes: les 2-cyano-n-tryptophylpiperidines et les 2-cyano-n-tryptophyl-1,2,5,6-tetrahydropyridines. Ces derniers sont obtenus dans des conditions tres douces et avec de bons rendements. Les resultats obtenus peuvent etre avantageusement compares a ceux obtenus par la reaction de polonovski modifiee, seule methode chimique permettant de preparer ces synthons

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LE, SERRE STEPHANIE. "Synthese et reactivite de systemes heteroallyliques : regioselectivite et etude mecanistique." Rennes 1, 1997. http://www.theses.fr/1997REN10204.

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Le travail presente dans ce memoire concerne la synthese et la reactivite de derives heteroallyliques. Dans la premiere partie, nous avons developpe la synthese des polyhalogenophosphines, -arsines, -stibines, -stannanes et -boranes allyliques. Ceux-ci sont obtenus par reaction d'echange entre un trialkylstannane allylique et un heteroelement polyhalogene. La reactivite de ces allylheterocomposes pour la plupart isoles, en presence d'electrophiles a ete etudiee. Cette etude nous a permis de mieux comprendre le mecanisme de cette reaction. Enfin, la reduction chimioselective de ces systemes hal

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Reinaud, Olivia. "Nouvelles methodes d'alkylation regioselective d'orthoquinones originales : synthese de differentes classes de produits naturels quinoniques." Paris 6, 1987. http://www.theses.fr/1987PA066200.

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