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Dissertations / Theses on the topic 'Organik reagent'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Walters, Jennifer Caroll. "NITROGEN-LIGATED (POLY)CATIONIC IODINE(III) REAGENTS: PLATFORMS FOR REAGENT DEVELOPMENT AND DIVERSE HETEROCYCLIC SYNTHESES." Diss., Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/558365.

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Chemistry<br>Ph.D.<br>Hypervalent iodine (HVI) reagents are easily accessed, highly tunable, mild, selective oxidants that are less toxic and more environmentally benign compared to their heavy metal counterparts. λ3-Iodanes, which possess an iodine center bound to one aryl substituent and two heteroatom ligands, have been the subject of recent interest due to their electrophilicity and hypernucleofugality. A central focus of the Wengryniuk laboratory has been the further development and application of a class of electrostatically activated (bis)cationic nitrogen-ligated HVI (N-HVI) reagents.

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2

Selander, Nicklas. "Development of Multi-Component Reactions using Catalytically Generated Allyl Metal Reagents." Licentiate thesis, Stockholm University, Department of Organic Chemistry, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-8077.

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<p>This licentiate thesis is based on the development of catalytic reactions for the synthesis and application of organometallic reagents. By use of palladium pincer-complex catalysts, we have developed an efficient procedure for the synthesis of allylboronates starting from allylic alcohols. These reactions were further extended by including various one-pot multi-component reactions, using the in situ generated allylboronates. Furthermore, novel unsymmetrical palladium pincer-complexes were synthesized and studied in auto-tandem catalysis.</p>

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3

Stridfeldt, Elin. "Hypervalent Iodine Reagents in Metal-Free Arylations and Vinylations : Investigation of Suitable Coupling Partners and Synthesis of New Reagents." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-141580.

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This thesis concerns the development of metal-free reactions to obtain carbon-heteroatom and carbon-carbon bonds. This is achieved by transferring carbon ligands from hypervalent iodine reagents to suitable nucleophiles. The bulk of the work presented herein concerns arylation of oxygen and nitrogen nucleophiles, using the well-known diaryliodonium salts as aryl sources. In the first project, O-arylation of the oxime ethyl acetohydroxamate was studied. It was found that electron-poor as well as electron-rich aryl moieties could be transferred successfully to this nucleophile. Furthermore, the

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4

Reeve, K. M. "Selenium reagents in organic synthesis." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37829.

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5

Skinner, Christopher John. "Elemental fluorine as a valid synthetic reagent." Thesis, Durham University, 1994. http://etheses.dur.ac.uk/5141/.

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Chapter I Chapter I reviews the uses of elemental fluorine in selective organic synthesis and its use in the generation of selective electrophilic fluorinating agents. Chapter II Chapter II describes a systematic investigation into suitable solvents for the direct fluorination of deactivated aromatic systems. After highlighting 98% formic acid and 98 % sulphuric acid as excellent media for fluorinations, a number of other protonic acids were investigated. The work confirms the power of the resulting in situ fluorinating species is dependent on the pKa of the protonic acid. Chapter III Chapter

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6

Smithies, Helen Kirsty. "Lead(IV) reagents in organic synthesis." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413211.

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7

Czyzewski, Michal. "Silenes : novel reagents for organic synthesis." Thesis, Durham University, 2010. http://etheses.dur.ac.uk/476/.

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Whilst silenes have long been studied for their unique chemistry there has been little attempt to exploit this in other synthetic strategies. As part of a programme to explore this aspect the reactions of readily accessible silenes with alkenes and dienes were studied. Silenes, generated by the thermolysis of acylpolysilanes, add to α,β-unsaturated esters to form silacyclobutanes and silyl-substituted cyclopropanes in moderate yields. Upon silicon-carbon bond oxidation the cyclopropanes were converted directly to 1,4-dicarbonyl compounds, thus demonstrating the formal acyl anion chemistry of a

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8

Orton, Darren. "Nitroacrylates : versatile reagents in organic synthesis." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/3782/.

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Nitroacrylates are stable, crystalline solids and have frequently been used in synthesis as reactive dienophiles in the Diels-Alder reaction. The regio- and diastereoselectivity of the Diels-Alder reaction is controlled by the electronic properties of the nitro group. This thesis describes work to utilise the nitro group to provide control of stereochemistry in the synthesis of natural products. The thesis begins by discussing the synthesis of nitroacrylates using both a nitro-aldol and radical based route. An investigation into their selectivity in the Diels-Alder reaction with a diverse arra

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9

Ndlovu, Bongani. "Kimberlite weathering : effects of organic reagents." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/33354.

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Diamonds are commonly present in an ore called kimberlite. Kimberlites vary extensively in mineralogy and therefore can complicate the processing and the extraction of diamonds. Weathering of kimberlite was investigated in this study and refers to the rapid physical breakdown of the kimberlite material. Kimberlite weathering by organic molecule adsorption was investigated utilising organic solutions; ethanol, formamide, n-hexane, oxalic acid, urea, pentanoic acid and acetic acid, was investigated. The extent of weathering was measured by XRD, TGA and FTIR analysis as well as by evaluating chan

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10

Desai, Bimbisar. "Microwave assisted organic synthesis." Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/842821/.

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The area of chemical research and synthesis increasingly recognises the need for improved technologies and methods, which involves chemical processes with less energy consumption, time savings, reduction and/or minimisation of waste, simple processes and an overall clean production. Microwave heating has been exploited in a variety of disciplines for many useful applications and organic synthesis is an area, which has benefited significantly over the past decade. The present study investigates organic reactions accelerated under microwave irradiations. In particular, the study involves use of

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11

Whittaker, David Thomas Edward. "Dimanganese decacarbonyl : a new reagent for radical organic synthesis." Thesis, University of York, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341094.

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12

Thokdar, Tarit Kumar. "Studies on the analytical application of some organic reagents as ligands." Thesis, University of North Bengal, 1991. http://hdl.handle.net/123456789/766.

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13

Willetts, S. E. "The reactions of modified Vilsmeier reagents." Thesis, Staffordshire University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370561.

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14

King, Angela Marie. "Chromogenic reagents for amines and cations." Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317009.

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15

Kim, Shang-U. "Synthesis of diene ceramides with organozirconium reagents." Thesis, The University of Arizona, 2004. http://hdl.handle.net/10150/292081.

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Ceramide serves as a precursor to sphingomyelins and glycosphingolipids, and as an important intermediate in the de novo biosynthesis. Ceramide will act as second messenger in cell systems to induce programmed cell death (apoptosis). Ceramide is composed of a sphingosine backbone and fatty acid linked in an amide bond, and its structural variations have been modified and synthesized by many research group. The diene ceramide, unusual analogues of ceramide with a conjugated diene may have higher reactivity than other novel ceramide in mitochondria by facilitated oxidation at C3. One of the most

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16

Ahmed, Taj Elsir Abbas. "New chemiluminescent reagents for organic and inorganic analysis." Thesis, University of Hull, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322554.

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17

Wright, Emma. "The development of organolead reagents in organic synthesis." Thesis, University of Oxford, 1995. http://ora.ox.ac.uk/objects/uuid:3cf2abd7-79f8-4963-82ad-ea3bb6eb98db.

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This thesis describes the synthesis of novel lead(IV) tetracarboxylates and the development of their use in carbon-carbon bond formation processes, with a particular emphasis on the construction of chiral, quaternary centres. Organolead(IV) tricarboxylates have been widely used in the functionalisation of a range of β-dicarbonyl compounds, and the available evidence suggests that these reactions occur by a ligand coupling mechanism. For this reason, by using chiral lead(IV) compounds, it may be possible to achieve a transfer of asymmetry in the bond formation reaction. A variety of achiral and

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18

Moran, Wesley James. "Novel uses of conjunctive reagents in organic synthesis." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401207.

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19

Hays, David S. (David Scott) 1970. "The development of organotin reagents for organic synthesis." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/47483.

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20

MacCoss, Rachel Nicola. "Applications of solid-supported reagents for organic synthesis." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614821.

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21

Wheatley, Andrew Edward Henry. "The role of organolithium reagents in organic synthesis." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624976.

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22

Bream, Robert Nicholas. "Multi-step organic synthesis using solid-supported reagents." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619764.

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23

Steele, Rebecca Mary. "Chiral sulfur-based reagents in asymmetric synthesis." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288453.

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24

Griffiths, Russell Jon. "Silenes : novel synthetic reagents for olefin functionalisation." Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4331/.

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Silenes, compounds containing silicon-carbon double bonds, have been subject to much theoretical interest over the past 25 years. However, despite their high reactivity, to date there have been no reports of the attempted use of silenes as synthetic reagents. Silenes have been formed by the thermolysis of acyltris(trimethylsilyl)silanes, which have been found to react with dienes to give Diels-Alder cycloadducts in good yield. Further to this, it has been found that silene dimers, formed by the photolysis of acyltris(trimethylsilyl)silanes, have been found to revert to give silenes at much low

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25

Roberts, Richard Spurring. "Studies on the phenyldimethylsilyllithium reagent and its applications to organic synthesis." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627120.

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26

Meek, Graham Andrew. "The use of π-allyltricarbonyliron lactone complexes in organic synthesis". Thesis, University of Cambridge, 1995. https://www.repository.cam.ac.uk/handle/1810/271957.

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27

Knowles, Andrew Robert. "Alternatives to organotin reagents in free radical chemistry." Thesis, University of Strathclyde, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366534.

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28

Roveda, Jean-Gregoire. "Hydrazides as tunable reagents for alkene hydroamination and aminocarbonylation." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28355.

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Intramolecular hydroamination and aminocarbonylation of alkenes are highly desirable synthetic transformations providing access to structures frequently used in medicinal chemistry. Most research efforts currently focus on achieving this reactivity through transition metal catalysis. Our approach involves using hydrazides under thermal (metal-free) conditions to achieve hydroamination or aminocarbonylation upon selection of the appropriate hydrazide substituent (R). Upon substitution when R=Ph, various different compounds were synthesized and isolated in moderate to excellent yields (39 to 98%

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29

Paul, Diana Rachel. "The development of new organolead reagents in organic synthesis." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320635.

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30

Davies, R. P. "The elucidation of organic reaction mechanisms involving lithium reagents." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598341.

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Lithium reagents are used to effect key deprotonation steps in numerous organic syntheses. In doing so they are often highly specific. However, little is known about how they function, the reasons for their high selectivity, and the natures of the lithiated organics present prior to work-up. This thesis seeks to redress this lack of structural knowledge of lithiated intermediates. It has been by isolating the intermediates in a variety of reactions involving lithiated organic reagents, establishing their precise identities, and studying their structures both in the solid and in solution that t

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31

Hollingworth, Gregory John. "Multifunctional reagents and 2(5H)-Furanones in organic synthesis." Thesis, University of Bristol, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317695.

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32

Lim, Chee-Kiang. "The development of new organotin reagents for organic synthesis." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/32169.

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33

Sanna, Monica. "The development of novel immobilised reagents for polymer-assisted organic chemistry." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289451.

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34

Crump, Roger Adrian Neil Callow. "Enantio- and diastereocontrol with silicon compounds in organic synthesis." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/272577.

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35

Duke, C. V. A. "The study and application of supported cyanide reagents." Thesis, University of York, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374163.

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36

Munhoz, Maria Fernanda Baptista. "Imobilização de polieletrólitos do tipo ionenos em suportes sólidos." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/46/46132/tde-15062009-101951/.

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Os polissabões são polímeros constituídos de unidades monoméricas anfifílicas. Em meio aquoso, os polissabões formam microdomínios intra- ou inter-poliméricos capazes de mimetizar muitas das propriedades de micelas, como solubilizar moléculas orgânicas, trocar contraíons e catalisar reações químicas. Os polissabões utilizados em nossos estudos foram os [n,m]-Ionenos, cuja estrutura química consiste de grupos dimetilamônio interligados por segmentos de cadeia alifática. [-(CH2)n-+N(CH3)2-(CH2)m-+N(CH3)2-]x Br- Br-[n,m]-Ioneno. Em solução aquosa, os [n,m]-Ionenos com segmentos metilênicos curtos

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37

Cragg-Hine, Ian. "Early main group metal complexes of multi-functional organic molecules." Thesis, University of Cambridge, 1995. https://www.repository.cam.ac.uk/handle/1810/271932.

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38

Hunter, Christopher. "Investigations and synthetic applications of #beta#-amino zinc reagents." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364835.

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39

Rose, Helen Louise. "New reactions of hypervalent iodine reagents with nitrogen compounds." Thesis, Keele University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283978.

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40

Mandal, Bablee. "Development of polymer supported reagents and catalysts in organic transformations." Thesis, University of North Bengal, 2009. http://hdl.handle.net/123456789/1304.

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41

Tang, Xiaoping. "New Methodologies in Organic Synthesis using Grignard and Organoaluminium Reagents." Thesis, University of Nottingham, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.523491.

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42

Sulaman, Mohammad Irfan. "New quinuclidine based reagents and their application in organic synthesis." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540012.

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43

Calogero, Francesco <1995&gt. "Photoredox Catalysis and Nucleophilic Organometallic Reagents – Application in Organic Synthesis." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10249/1/thesis_revised_FC.pdf.

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The main purpose of my PhD was the combination of the principles of transition metal catalysis with photoredox catalysis. We focused our attention on the development of novel dual catalytic protocols for the functionalization of carbonyl compounds through the generation of transient nucleophilic organometallic species. Specifically, we focused on the development of new methodologies combining photoredox catalysis with titanium and nickel in low oxidation state. Firstly, a Barbier-type allylation of aromatic and aliphatic aldehydes –catalytic in titanium– in the presence of a blue photon-absorb

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44

Xia, Xuanshu, and 夏轩庶. "Development of phosphorus-mediated reactions in organic synthesis / y Xia Xuanshu, B. Sc., Sun Yat-sen U." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/209480.

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Polymer-supported catalysts and reagents have been widely used in organic chemistry because they could facilitate the purification procedures and usually be recycled. Much research has been directed to polymer-supported catalysts and reagents, mainly focusing on these aspects, such as new polymer support, new application in organic chemistry, different modifications and so on. Many polymer-supported phosphine reagents have been developed for Wittig reaction. However, most of them suffer from swelling issue or low loading. A new polyethlyeneimine-supported triphenylphosphine has been synthesi

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45

Massam, Jarrod. "The role of some aluminosilicates as catalyst and reagent supports for organic reactions." Thesis, Leeds Beckett University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306971.

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46

Saeed, Mansoor. "Novel achiral and chiral derivatising reagents for indirect chiral resolution." Thesis, University of Sunderland, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260828.

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47

McLaren, Lee. "Synthetic applications of hypervalent iodine reagents : total synthesis of aranorosin." Thesis, University of East Anglia, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385890.

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48

Koyuncu, Demet. "Functional group oxidations using sodium perborate and hypervalent iodine reagents." Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303030.

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49

Bazin, Jerome Fernand Yves. "Approaches towards the synthesis of ebelactone A using silicon reagents." Thesis, University of Cambridge, 1990. https://www.repository.cam.ac.uk/handle/1810/272740.

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50

Stefani, Helio Alexandre. "Reagentes de selênio e telúrio em síntese orgânica: íons de carbênio estalizados por selênio e alfa-telurocetonas." Universidade de São Paulo, 1988. http://www.teses.usp.br/teses/disponiveis/46/46135/tde-09092011-113001/.

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Na primeira parte deste trabalho, desenvolvemos duas metodologias para a preparação de α-dicloroteluro cetonas. A primeira utiliza a reação direta de tricloretos de ariltelúrio com cetonas e a segunda envolve a reação do mesmo reagente com éteres enólicos de silício de cetonas. As dicloroteluro cetonas preparadas foram transformadas em α-halo cetonas pela reação com cloro ou bromo, ou utilizando condições de termólise sob pressão reduzida. Dados de ressonância magnética nuclear de 1H e de 13C, de difração de raios-X e de espectros no infra-vermelho foram utilizados na determinação es

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