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Dissertations / Theses on the topic 'Piperidin'

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Published: 4 June 2021

Last updated: 27 July 2025

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1

Stapper, Christian. "Ringumlagerungen und Synthese von Piperidin- und Pyrrolidinalkaloiden durch Olefinmetathese." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962764485.

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2

NOGUE, DENISE. "Synthese regio et stereoselective d'heterocycles azotes via la reaction d'imino diels alder. Analyse conformationnelle de decahydroquinolein-4-ones et de piperidin-4-ones par correlation rmn #1h, m. M. Et rx." Paris 11, 1993. http://www.theses.fr/1993PA112254.

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Le travail rapporte dans ce memoire concerne d'une part la synthese d'heterocycles azotes tels que les n-aryl-2-aryl decahydroquinolein-4-ones et les n-aryl-2-aryl piperidin-4-ones et, d'autre part, leur analyse conformationnelle. L'etude de la reaction d'imino diels alder du 1-(1-trimethylsilyloxyethenyl)-cyclohexene et d'imines catalysee par des acides de lewis a permis d'obtenir selectivement ou tres majoritairement les enoxysilanes exo ou endo selon la nature des groupes aryles ar et ar lies respectivement au carbone et a l'azote de l'imine. Ainsi, l'utilisation du t-butyldimethylsilyle tr

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3

Lewis, Neil. "Asymmetric piperidine synthesis." Thesis, University of Nottingham, 1995. http://eprints.nottingham.ac.uk/13293/.

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It has been demonstrated that bakers' yeast reduction of 1-tert-butyl-2-methyl 3-oxo-piperidine-1,2-dicarboxylate gives (2R, 3S), 1-tert-butyl-2-methyl 3-hydroxy-piperidine-1,2-dicarboxylate in 80% chemical yield with >99% d.e. and >97% e.e. Also bakers' yeast reduction of 1-tert-butyl-3-ethyl 4-oxo-piperidine-1,3-dicarboxylate gives (3R, 4S), 1-tert-butyl-3-ethyl4-hydroxy-piperidine-1,3-dicarboxylate in 74% chemical yield with >99% d.e. and >93% e.e. The optical purity and absolute configurations of the hydroxy-ester derivatives were determined by conversion into the corresponding chiral bis-

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4

Khan, Abdul Majeed 1980. "Síntese e termoquímica de adutos de brometos de metais bivalentes com aminas hetrocíclicas." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249123.

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Orientador: Pedro Oliver Dunstan Lozano<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Química<br>Made available in DSpace on 2018-08-22T07:28:40Z (GMT). No. of bitstreams: 1 Khan_AbdulMajeed_D.pdf: 3004508 bytes, checksum: 1d8c778094bf0cb1b93fa7bf80e19074 (MD5) Previous issue date: 2013<br>Resumo: Os adutos MX2.nL (M = Mn, Fe, Co, Ni, Cu ou Zn, L = 3-cianopiridina, piperidina ou piperazaina, X = Br, n = 0,5, 0,75, 1, 1,5, 2 ou 4), foram sintetizados e caracterizados através de análise elementar, determinação de pontos de fusão, espectroscopia IV e eletrônica e análise

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5

Rosset, Isac George. "Diazocetonas α,β-insaturadas como reagentes multifuncionais: aplicação na síntese de alcaloides piperidínicos e pirrolidínicos." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/75/75133/tde-20052015-101409/.

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p>O primeira parte do trabalho descreve a preparação de um novo reagente de olefinação de HWE para o preparo de diazocetonas α, β-insaturadas com geometria Z e aplicação na síntese de núcleos piperidínicos funcionalizados. Através da otimização da reação de HWE empregando o benzaldeído como aldeído padrão foi possível maximizar a obtenção do isômero Z desejado (92%, Z:E 9:1). As reações-chave para a formação dos núcleos piperidínicos foram a de olefinação de HWE utilizando amino-aldeídos, obtendo-se bons rendimentos e boa seletividade, seguida de uma reação de inserção N-H catalisad

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6

Ries, Stefan. "Versuche zur Totalsynthese von Pseudodistomin C und E - Ein neuer Syntheseweg." kostenfrei, 2009. http://www.opus-bayern.de/uni-wuerzburg/volltexte/2009/3993/.

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7

Geant, Pierre-Yves. "Synthèse d'aminoalcools assistée par un sulfoxyde chiral." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20169/document.

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Les travaux présentés dans ce mémoire décrivent une nouvelle voie de synthèse d'aminoalcools 1,2 à partir de γ-bromo-β-cétosulfoxydes, dans lesquels seul le centre stéréogène du soufre est défini. Cette synthèse s'appuie sur deux processus hautement stéréocontrôlés dirigés par le groupement sulfoxyde : le dédoublement cinétique dynamique lors de la substitution nucléophile du brome par la dibenzylamine et la réduction diastéréosélective du carbonyle. Les syn-γ-N,N-dibenzylamino-β-hydroxysulfoxydes correspondants ont été obtenus avec des excès diastéréoisomériques supérieurs à 95%. Les syn-γ-N,

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8

Taylor, Sarah Alison. "Sulfur-mediated pyrrolidine and piperidine synthesis." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613286.

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9

Turner, Ian. "Piperidines from tetrahydroimidazoles." Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334848.

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10

Girling, Paul Ricardo. "Novel approaches to piperidine and hydropyridine derivatives." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/6354/.

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Three new modes of reactivity are reported between the reaction of an imine, but-3-en-2-ones and a Lewis acid. These are formal [2+2+2]-, [1+2+1+2]- and [4+2]- cycloadditions, deriving 1,1'-(1,2-dihydropyridine-3,5-diyl)diethanones, 1,1'-(1,4-dihydropyridine-3,5-diyl)diethanones and piperidin-4-ones and respectively. The [2+2+2]- and [1+2+1+2]-cycloadditions proceed when R3 = LG (leaving group), with the [1+2+1+2]-pathway dominating when the imine is easily hydrolysed within the reaction conditions. When R3 ≠ LG, the cycloaddition proceeds through different [4+2]-mechanistic pathways, dependen

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11

Adams, David Roger. "Studies in the synthesis of piperidine alkaloids." Thesis, University of Exeter, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236570.

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12

Mosts, R. C. "Studies in the synthesis of piperidine alkaloids." Thesis, University of Essex, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379495.

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13

Eskici, Mustafa. "Asymmetric piperidine synthesis via 1,3-cyclic sulfates." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368215.

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14

Adriaenssens, Louis. "Stereoselective synthesis of piperidines." Thesis, Connect to e-thesis to view edited abstract. Move to record for print version, 2008. http://theses.gla.ac.uk/49/.

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15

Kawamura, Meire Yasuko. "Emprego de diazocetonas α,β-insaturadas com geometria Z na direta construção de esqueletos indolizidínicos e piperidínicos funcionalizados." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/75/75133/tde-26082016-104019/.

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Pumiliotoxinas e seus congêneres são compostos isolados da pele de algumas espécies de sapos das famílias Dendrobatidae, Mantellidae, Bufonidae, e Myobatrachidae, apresentando interessantes propriedades farmacológicas. As pumiliotoxinas, embora tóxicas, apresentam consideráveis atividades cardiotônicas, assim, acredita-se que as homopumiliotoxinas, as desmetilpumiliotoxinas e as desidrodesmetilpumiliotoxinas também devam apresentar. Nesse sentido, a síntese destes compostos é de extrema valia para a comunidade científica. As diazocetonas α,β-insaturadas são intermediários promissore

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16

Woods, Gordon Alexander. "Synthetic approaches to functionalised piperidines." Thesis, University of Oxford, 1999. http://ora.ox.ac.uk/objects/uuid:4c6fdb6c-c021-447c-8fc9-35241b552850.

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This thesis is concerned with the synthesis of functionalised piperidines. The piperidine unit is found in numerous alkaloids and other natural products, and has also been incorporated into synthetic compounds of significant therapeutic or strategic synthetic potential. Although numerous syntheses of individual piperidine compounds have been published, there are few general routes to this class of compounds, and there is therefore a need for such routes to be developed. Bicyclic lactams derived from (S)-pyroglutamic acid have been shown to be useful synthons in the synthesis of pyrrolidines. A

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17

Ottersbach, Dirk. "Dehydrierung n-substituierter Delta3-Piperideine /." [S.l. : s.n.], 1988. http://www.gbv.de/dms/bs/toc/025230328.pdf.

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18

Williams, Jodi Thomas. "Stereoselective piperidine synthesis via ene and carbonyl ene cyclisations." Thesis, Oxford Brookes University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289247.

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19

Lenagh-Snow, Gabriel Matthew Jack. "The synthesis of azetidine and piperidine iminosugars from monosaccharides." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:207235d5-2ea5-4724-92fd-924fa0ccd4ed.

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Iminosugars are polyhydroxylated alkaloids, and can be generally defined as sugar mimetics in which the endocyclic oxygen atom has been replaced with a basic nitrogen. A common affect of this atomic substitution is to bestow these compounds with the ability to inhibit various sugarprocessing enzymes; most significantly the glycosidases (glycoside hydrolases) which areintimately involved in a huge array of biological functions. Compounds which inhibit these enzymes concordantly possess much potential as medicinal agents for the treatment of a variety of diseases. Several iminosugars have alread

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20

Dumare, N. B. "Synthetic studies towards mitralactonine, pipecolic acid and piperidine alkaloids." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2013. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/1920.

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21

Abdelsalam, Mansour. "Synthesis of piperidines using organometallic chemistry." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/4069/.

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22

Williams, Meredith Richard Vaughan. "Sulfone-mediated synthesis of enantiopure piperidines." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299202.

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23

Cariou, Claire. "Diastereoselective synthesis of 2,4,5-trisubstituted piperidines." Thesis, University of Birmingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434701.

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24

Bergman, Zara Dominique. "2,3,4-trisubstituted piperidines : a stereocontolled approach." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5794/.

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This thesis details a methodology utilising various synthetic pathways towards cyclisation precursors suitable for use in Prins and carbonyl-ene cyclisations to effect 2,3,4-trisubstituted piperidines. Once the precursors were synthesised, we were interested in the stereochemical outcomes of the cyclisations, in particular identity and rational of the kinetic and thermodynamic products and their variation due to differing substituents on C2. Previous work in the Snaith group has addressed various other substitution patterns and 2,3,4-trisubstituted piperidines are central components of a vast

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25

McGrane, Emma Scott. "Novel approaches towards pyrrolidines and piperidines." Thesis, Kingston University, 2004. http://eprints.kingston.ac.uk/20731/.

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26

Archibald, Glenn Philip. "Use of novel nitrones in the synthesis of piperidine alkaloids." Thesis, University of Auckland, 2011. http://hdl.handle.net/2292/7127.

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The current study focused on development of a flexible synthetic strategy for the enantioselective preparation of 2-substituted-3-hydroxypiperidines utilising chiral 3-hydroxytetrahydropyridine N-oxides. Initial studies into the regio- and stereoselectivity of the 1,3-dipolar cycloaddition reaction between O-benzyl protected 3-hydroxytetrahydropyridine N-oxide 208 and a range of alkenes, proceeded with excellent exo/endo selectivity and near perfect regioselectivity. However the anti/syn selectivity was only moderately in favour of the desired anti-compounds. Further development has led to the

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27

Lonkar, P. S. "Pyrrolidine and piperidine nucleic acids: novel class of PNA analogues." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2004. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2879.

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28

Ferrari, Frank D. "Flexible synthesis of spirocyclic pyrans and piperidines." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3829/.

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Spirocyclic piperidines and spirocyclic pyrans are prevalent throughout nature, often appearing in natural products which exhibit exciting biological activities. Notable examples of spirocyclic piperidine-containing biologically active natural products are halichlorine, pinnaic acid and tauropinnaic acid. Despite their structural similarity, halichlorine and the pinnaic acids were isolated from separate organisms; halichlorine was isolated from extracts of the marine sponge Halichondria okadai while both pinnaic acid and tauropinnaic acid were isolated from the Okinawan bivalve mollusc Pinna m

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29

Mould, Roger James. "Aza-Wittig rearrangement of aziridines to piperidines." Thesis, University of Exeter, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296237.

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30

Smith, Peter Duncan. "Synthesis of pipecolic acid derivatives via aza-Diels-Alder reactions." Thesis, Heriot-Watt University, 2000. http://hdl.handle.net/10399/552.

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31

Moore, Rebecca J. "Novel approaches to natural product synthesis using organozinc intermediates." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362516.

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32

Coggins, P. "Syntheses with 2-alkyl-2,3,4,5-tetrahydropyridine-1-oxides." Thesis, University of Exeter, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235969.

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33

Gandon, Lucile Alice. "A radical sterocontrolled synthesis of 2,4-disubstituted piperidines." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403012.

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34

Hutchinson, Ian Paul. "The synthesis of 3-substituted-2-(nitromethylene)-piperidines." Thesis, University of Warwick, 1994. http://wrap.warwick.ac.uk/104212/.

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The class of insecticides known collectively as the nitromethylene heterocycles (NMHs) were discovered in the late 1970's. The NMHs are a group of compounds that are particularly active against certain insects, exhibit low toxicity to vertebrates and are non-persistent in the environment. Their site of action is on the cholinergic synapse where they act as agonists at the post-synaptic nicotinic acetylcholine receptors. Research into developing these types of compounds has led to a wide range of analogues being synthesised, resulting in a wide variety of activities. Analogues of 2- (nitromethy

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35

Mathieu, Hélène. "Syntheses asymetriques de piperidines fonctionnalisees a partir d'acyloxazolidines." Paris 6, 1998. http://www.theses.fr/1998PA066231.

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Une reaction de condensation entre un aminoalcool enantiopur et un aldehyde fonctionnalise suivie d'une carbamation stereoselective a permis d'acceder a des cetooxazolidines diastereoisomeriquement pures avec un groupe tert-butoxycarbonyle comme groupe protecteur de la fonction amine. Des etudes realisees concernant la stereoselectivite de la reduction de la fonction carbonyle, placee soit en , soit en du c-2 de l'oxazolidine, ont montrees que l'induction asymetrique de la couple chirale etait plus efficace dans le cas d'un transfert de chiralite 1,2 (c = o en ) que 1,3 (c = o en ). L'obtentio

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36

Cochrane, Edward. "Synthesis of substituted piperidines using chiral organolithium chemistry." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/6622/.

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37

Launay, Guillaume. "New approaches for C-F bond formation in organic chemistry." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/922.

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The importance of fluorinated organic molecules has grown over the last 50 years, particularly in the pharmaceutical and agrochemical industries. Therefore the development of new methods for fluorination is a very attractive research area. In Chapter 1, the properties and impact of the fluorine atom on organic molecules are overviewed. Existing electrophilic and nucleophilic fluorination methods are reviewed, and new developments in asymmetric fluorination are discussed. The emergence of the Prins fluorination reaction as a side product in BF₃.OEt₂ catalysed processes has been investigated as

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38

Adelbrecht, Jean-Claude. "Bis (arylsulfonyl) tetrahydropyridines : application to the synthesis of piperidines." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406619.

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39

Hughes, Mark Charles. "The development of new approaches to stereoselective functionalised piperidines." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342543.

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40

Aeyad, Tahani. "Synthesis of substituted azepanes and piperidines using organolithium chemistry." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/20712/.

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α-Amino-organolithium compounds represent an important class of intermediates due to their excellent nucleophilic reactivity and importance in synthetic organic chemistry. This thesis describes some novel aspects of the n-BuLi mediated lithiation‒substitution of N-Boc heterocycles, including N-Boc-2-substituted azepane, benzazepine and piperidine derivatives.

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41

Yau, K. C. "The asymmetric synthesis of oxo-piperidines and oxo-pyrrolidines." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1451240/.

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Chapter 1 describes the attempts to synthesize piperidin-2-ones via an aza-Michael-Michael annulation, which were unsuccessful. A general route for the synthesis of piperidin-2,4-diones from β-keto esters via a Dieckmann cyclisation was proposed and five piperidin-2,4-diones with different substituents at positions-5 and -6 were prepared. An asymmetric route to 1-unsubstituted piperidin-2,4-diones was also developed which involved the use of Davies' chiral auxiliary to induce an asymmetric Michael addition. Chapter 2 describes a new approach to the synthesis of codeine. The piperidin-4-one rin

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42

Gu, Xiaobo. "Synthesis and SAR study of Meperidine Analogues as Selective Serotonin Reuptake Inhibitors (SSRIs)." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1111.

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Meperidine has been shown to have potent binding affinity for serotonin transporters (SERT) (Ki = 41 nM) and be an inhibitor of serotonin reuptake. Based upon these pharmacological results meperidine has been identified as a lead compound for the development of a novel class of serotonin-selective reuptake inhibitors (SSRIs). A variety of potent analogues of meperidine have been synthesized and evaluated in vitro as potential ligands for the serotonin transporter. Substitutions have been made on the aryl ring, the ester moiety and the piperidine nitrogen of meperidine. Potent analogues o

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43

Moraux, Thomas. "Synthesis and evaluation of α-fluoro analogues of capsaicin and 2-(aminomethyl)piperidine derivatives". Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2094.

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Chapter 1 gives an overview of the fluorine chemistry field, from its early developments to recent applications in medicinal chemistry. The development of asymmetric electrophilic or nucleophilic installation of fluorine in organic molecules is highlighten. Chapter 2 of this thesis discusses the enantioselective synthesis of α-fluoroamides. The study is applied to the synthesis of fluoroenantiomers of the bioactive molecule capsaicin and short-chain analogues. The biological activity of these compounds is assayed with the TRPV1 receptor. Results show that enantioselective α-fluoroamides (R)-97

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44

FERNANDES, Ítalo Antônio. "Síntese e avaliação de derivados piperidino-benzodioxola planejados como novos candidatos a fármacos leishmanicidas." Universidade Federal de Alfenas, 2013. https://bdtd.unifal-mg.edu.br:8443/handle/tede/284.

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As doenças parasitárias continuam sendo um sério desafio de saúde pública, principalmente em países subdesenvolvidos ou em desenvolvimento. Dentre as diversas parasitoses existentes, pode-se destacar a leishmaniose, endêmica em vários países localizados nas regiões tropicais e subtropicais do globo terrestre. Ainda hoje, milhões de pessoas adquirem a infecção e milhares vão a óbito devido às complicações da doença quando não diagnosticada e tratada corretamente. Pesquisas voltadas à busca de tratamentos mais efetivos e seguros de doenças consideradas de países que negligenciam tais são de sum

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45

Österlund, Modalen Åsa. "Opioids and regulation of breathing /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7140-123-7/.

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46

Mancey, Nicole Claire. "Investigations Intro [3+3] Cycloadditions for the synthesis of piperidines." Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522345.

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47

Pöschl, Anna. "Synthesis of novel piperidine building blocks and their use for the preparation of donepezil analogues." Thesis, King's College London (University of London), 2015. http://kclpure.kcl.ac.uk/portal/en/theses/synthesis-of-novel-piperidine-building-blocks-and-their-use-for-the-preparation-of-donepezil-analogues(7bca2c61-fc01-4496-adb5-b42872749a34).html.

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The piperidine moiety is found in a vast number of bioactive natural products as well as numerous marketed drugs and is therefore an interesting target for synthetic modi cations. Synthetic piperidines currently in the clinic are predominantly limited to 1,4-disubstitution on the piperidine ring, hence it is important to develop strategies to access new drug candidates with diverse substitution con gurations on the ring. For this purpose, the aza-Michael reaction can be used as an atom-ecient method to access biologically important piperidines. An initial study into the utility of divinyl keto

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48

Chi, Feng. "Studies on the monoamine oxidase substrate/inactivator properties of piperidine analogs of the neurotoxin MPTP." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-02132009-171404/.

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49

Upadhyay, P. K. "Development of new methodology using phosphorus ylides and enantioselective synthesis of pyrrolidine and piperidine alkaloids." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2009. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2768.

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50

Bockelmann, Maria Alice. ""Adição diastereosseletiva de enolatos de titanio a ions N-aciliminio ciclicos : estudos visando a sintese de alcaloides e a sintese assimetrica do farmaco cloridrato de (+)-fenidato de metila"." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249273.

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Orientador: Ronaldo Aloise Pilli<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-04T03:24:13Z (GMT). No. of bitstreams: 1 Bockelmann_MariaAlice_D.pdf: 38380135 bytes, checksum: ccd3fbf3780ed6acdc817e4423cdfafd (MD5) Previous issue date: 2004<br>Doutorado<br>Quimica Organica<br>Doutor em Quimica

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