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Dissertations / Theses on the topic 'Substituted nitrogen and suphur'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Philbin, Simon Patrick. "Studies of novel nitro-substituted nitrogen heterocyclic compounds." Thesis, Brunel University, 2001. http://bura.brunel.ac.uk/handle/2438/2165.

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The novel candidate high energy insensitive explosive; 2,5-diamino-3,6-dinitropyrazine (ANPZ-i) has been prepared in acceptable overall yield. ANPZ-i was synthesised by the nitration of 2,5-diethoxypyrazine using nitronium tetrafluoroborate (NO2+BF4-) in sulfolane and the subsequent amination of 2,5-diethoxy-3,6-dinitropyrazine, under autoclave conditions. Oxidation studies towards the dioxide derivative of ANPZ-i, 2,5-diamino-3,6-dinitropyrazine-1,4-dioxide (PZDO), were unsuccessful. The synthesis of existing high explosives; 2,6-diamino-3,5-dintropyrazine (ANPZ) and 2,6-diamino-3,5-dinitropy

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2

Barker, Graeme. "New lithiation methodologies to 2-substituted nitrogen heterocycles." Thesis, University of York, 2011. http://etheses.whiterose.ac.uk/1549/.

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This thesis describes the development of methodologies for lithiation-trapping and lithiation-arylation of N-Boc heterocycles in the position α to nitrogen as well as in situ infra-red spectroscopic monitoring of lithiation reactions and the application of lithiation-arylation in total synthesis. Chapter 2 details the use of in situ infra-red spectroscopy to monitor the lithiation of N-Boc pyrrolidine, N-Boc piperidine, N-Boc homopiperidine, an N-Boc acetal piperidine, N-Boc-Nʹ-benzyl piperazine, N-Boc-Nʹ-i-Pr imidazolidine and an O-alkyl carbamate in diethyl ether using s-BuLi and the diamine

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3

Al-Bashir, Bilal. "Bioavailability of nitrogen-substituted polycyclic aromatic hydrocarbons in flooded soil systems." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28654.

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The sorption/desorption behavior in soil/water systems of $ sp{14}$C-radiolabeled naphthalene and nine of its nitrogen-substituted derivatives; quinoline, isoquinoline, quinoxaline, 1-aminonaphthalene, 2-aminonaphthalene, 1-amino-2-methylnaphthalene, 1-nitronaphthalene, 2-nitronaphthalene and 1-nitro-2-methylnaphthalene were investigated with respect to their physico-chemical properties and the type of interaction they form with soil organic and mineral matter. In turn, an investigation into the effect that sorption/desorption has on the bioavailability of these organic compounds and their min

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4

Vink, Mandy Kyung Shim. "From nitriles to nitrogen heterocycles chemoenzymatic approaches toward diversely substituted enantiopure building blocks /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2003. http://dare.uva.nl/document/68739.

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5

Allgäuer, Dominik. "Kinetics and mechanisms of the reactions of nitrogen ylides with acceptor-substituted olefins." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-181637.

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6

Willumstad, Thomas P. (Thomas Paul). "Synthesis of highly substituted benzo-fused nitrogen heterocycles via tandem benzannulation/cyclization strategies." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84379.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Benzannulations employing ynamides and vinylketenes (generated in situ from [alpha]-diazo ketones) were investigated. Irradiation of the diazo ketones using a batch or continuous-flow reactor leads to the formation of vinylketenes via a photo-Wolff rearrangement. The vinylketenes then react with ynamides via a pericyclic cascade process to produce highly substituted aniline derivatives. Using this vinylketene-based benzannulation,

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7

Morpeth, Alan George. "The synthesis and structural characterisation of isatogens substituted in the 2-position by nitrogen heterocycles." Thesis, University of Sunderland, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328897.

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8

Allgäuer, Dominik [Verfasser], and Herbert [Akademischer Betreuer] Mayr. "Kinetics and mechanisms of the reactions of nitrogen ylides with acceptor-substituted olefins / Dominik Allgäuer. Betreuer: Herbert Mayr." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://d-nb.info/1069743747/34.

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9

Lalanne, Matthieu Raphael [Verfasser]. "Gas Phase Formation and Photodissociation Spectroscopy of Mass Selected Nitrogen and Oxygen Substituted Carbon Clusters / Matthieu Raphael Lalanne." Berlin : Freie Universität Berlin, 2016. http://d-nb.info/1119151279/34.

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10

Fortune, Kevin Martin. "Nitrogen donor complexes of molybdenum and tungsten and new routes to BIS-1,2 & TRIS-1,2,3 substituted ferrocenes." Thesis, Bangor University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409440.

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11

Xu, Peng. "Asymmetric Synthesis of Nitrogen Containing Bioactive Compounds via the Utilization of Enantiopure p-Toluenesulfinimines." Diss., Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/216585.

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Chemistry<br>Ph.D.<br>The research objective of this thesis research was to develop new methods for the asymmetric synthesis of amine derivatives using p-toluenesulfinimines. Enantiopure sulfinimines are versatile chiral building blocks for the asymmetric synthesis of alkaloids. Sulfinimines were prepared by the condensation of (S)- or (R)-p-toluenesulfinamide with aldehydes and ketones in good to excellent yields, which were prepared from the commercially available Anderson reagent. The first research project was the development of a new method for the preparation of enantiopure anti-anti- α-

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12

Pochekailov, Sergii. "Elektrické, optické a senzorové vlastnosti organických polovodičů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-233292.

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There is big interest in cheap, sensitive and selective gas sensors. In this work, substituted soluble phthalocyanines are proposed as a sensing materials for several gases. Optical, electrical and gas sensing properties of several phthalocyanines were studied and the mechanisms of their interaction with several analyte gases are described. It was found, that sulfo-substituted Pcs has good sensitivity to humidity. Sulfonamide-substituted phthalocyanines are promising for nitrogen dioxide and volatile organic compounds detection. tert-Butyl-substituted phthalocyanines are sensitive to NO2 under

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13

Hirst, Elizabeth S. "Synthesis of nitrogen-substituted cycloparaphenylenes." Thesis, 2014. https://hdl.handle.net/2144/15261.

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Bottom-up synthesis is increasingly becoming the method of choice for assembling and studying novel nanomaterials. Whereas more traditional top-down methods may lead to mixtures of products and suffer from reproducibility issues, bottom-up approaches offer atomistic control over the material's structure. Bottom-up synthesis can also produce materials that would otherwise be unobtainable with top-down methodologies. Finite substructures of carbon nanotubes (CNTs) are one such example. The work encompassed in this thesis details the study of two related classes of CNT substructures: the cyclopar

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14

Ziffle, Vincent Elan. "Synthesis of benzo-fused nitrogen heterocycles and substituted benzenes." 2010. http://hdl.handle.net/10048/1009.

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Thesis (Ph. D.)--University of Alberta, 2010.<br>Title from pdf file main screen (viewed on June 24, 2010). A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Department of Chemistry, University of Alberta. Includes bibliographical references.

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15

Ziffle, Vincent. "Synthesis of benzo-fused nitrogen heterocycles and substituted benzenes." Phd thesis, 2010. http://hdl.handle.net/10048/1009.

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The first chapter of this thesis represents the continued development of a general method for the formation of benzo-fused N-heterocycles by formal radical cyclization onto benzene rings. Important stages in this process involve 1) the copper-mediated coupling of various amino alcohols to protected p-iodophenols, 2) carbamate-protection of the resulting aryl secondary amine to allow the following oxidation step, 3) the oxidative formation of quinone ketals as radical acceptors, 4) the radical cyclization of pendant iodo-radical triggers onto the cross-conjugated ketone, and 5) the subsequent

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16

Fu, Jinlong. "Thermal cis-to-trans isomerization mechanism of N-(phenylazo)-substituted nitrogen heterocycles." Thesis, 2008. http://hdl.handle.net/10012/4134.

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Triazenes, compounds containing a diazoamino moiety (–N(1)=N(2)–N(3)<), are known for their reversible cis-trans isomerization character and hence, have the potential to be used in photoswitchable devices and photostorage media. However, little is known about their cis-trans isomerization mechanism. In this thesis, kinetic studies on the thermal cis-to-trans isomerization of N-(phenylazo)-substituted nitrogen heterocycles are presented. It is shown that the isomerization rate constant increases as the size and electron-donating character of the cyclic amine increases, as the electron-withdrawi

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17

KOTIPALLI, TRIMURTULU, and 柯帝. "EXPLORATION OF 2-HALOGENATED N-SUBSTITUTED BENZAMIDE AND N-SUBSTITUTED HYDRAZIDES FOR THE SYNTHESIS OF OXYGEN AND NITROGEN HETEROCYCLIC COMPOUNDS." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/63846157330424238004.

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博士<br>國立臺灣師範大學<br>化學系<br>104<br>The contents of this dissertation is divided into two parts (Part I, Part II). Part Ι is subdivided into four sections i.e. Section A, B, C, D. Section A, illustrates the overview on 2-halo N-substituted benzamide derivatives. this section also described the previous reports and a brief survey on ligand promoted metal or metal free catalyzed reactions for the construction of C-C, C-N, C-O, C-S, CSe, C-Te bond formation reactions by using N-substituted benzamide. Section B, describes the “synthesis of indolo[1,2-a]quinazolinone derivatives via C-N cross coupling

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18

Hung, Chia-Cheng, and 洪家成. "Cycloaddition Reactions and Synthetic Applications of Thio-Substituted 1,3-Dienes with Carbon-Nitrogen and Carbon-Oxygen Double Bonds." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/17518587642016446563.

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博士<br>輔仁大學<br>化學系<br>89<br>This thesis contains three parts. The first part of the thesis studies the aza-Diels-Alder reactions of 2-(phenylthio)-1,3-butadienes with some simple iminium salts to give the piperidine or pipecolic acid derivatives. The thio-substituent not only enhances the reactivity of the diene, but also controls the regioselectivity of this reaction, giving only “para”-substituted cyclized products (with respect to the nitrogen). The second part of the thesis reports the first aza-Diels-Alder reactions of arylsulfonyl isocyanates with thio-substituted 1,3-butadiene

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19

Roy, Sounak. "Noble Metal And Base Metal Ion Substituted Ceo2 And Tio2 : Efficient Catalysts For Nox Abatement." Thesis, 2007. https://etd.iisc.ac.in/handle/2005/584.

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In recent times, as regulations and legislations for exhaust treatment have become more stringent, a major concern in the arena of environmental catalysis is to find new efficient and economical exhaust treatment catalysts. Chapter 1 is a review of the current status of various NOx abatement techniques and understanding the role of “auto-exhaust catalysts” involved therein. Chapter 2 presents the studies on synthesis of ionically substituted precious metal ions like Pd2+, Pt2+ and Rh3+ in CeO2 matrix and their comparative three-way catalytic performances for NO reduction by CO, as well as CO a

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20

Roy, Sounak. "Noble Metal And Base Metal Ion Substituted Ceo2 And Tio2 : Efficient Catalysts For Nox Abatement." Thesis, 2007. http://hdl.handle.net/2005/584.

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In recent times, as regulations and legislations for exhaust treatment have become more stringent, a major concern in the arena of environmental catalysis is to find new efficient and economical exhaust treatment catalysts. Chapter 1 is a review of the current status of various NOx abatement techniques and understanding the role of “auto-exhaust catalysts” involved therein. Chapter 2 presents the studies on synthesis of ionically substituted precious metal ions like Pd2+, Pt2+ and Rh3+ in CeO2 matrix and their comparative three-way catalytic performances for NO reduction by CO, as well as CO a

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21

Hammond, Karl Daniel. "Quantifying defects in zeolites and zeolite membranes." 2010. https://scholarworks.umass.edu/dissertations/AAI3397703.

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Zeolites are crystalline aluminosilicates that are frequently used as catalysts to transform chemical feedstocks into more useful materials in a size- or shape-selective fashion; they are one of the earliest forms of nanotechnology. Zeolites can also be used, especially in the form of zeolite membranes (layers of zeolite on a support), to separate mixtures based on the size of the molecules. Recent advances have also created the possibility of using zeolites as alkaline catalysts, in addition to their traditional applications as acid catalysts and catalytic supports. Transport and catalysis in

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22

Zhuang, Xin-Yi, and 莊新毅. "Synthesis of Benzo[4,5]imidazo[1,2-a]pyridine and its derivatives by intermolecular carbon-nitrogen bond coupling reaction between aniline and pyridine induced by different aromatic substituted hypervalent iodine reagents." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ncwgwy.

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碩士<br>國立中山大學<br>化學系研究所<br>107<br>In this thesis, we have successfully found two types of highpervalent iodine reagents with different substituent groups: (4-methoxyphenyl)- λ3-iodanediyl diacetate and (4-methoxyphenyl)- λ3-iodanediyl diacetate, increasing the yield of the production of benzo[4,5]imidazo[1,2-a]pyridines with aniline derivatives and pyridine derivatives as starting materials. 　　In this thesis, we have successfully found two types of highpervalent iodine reagents with different substituent groups: (4-methoxyphenyl)- λ3-iodanediyl diacetate and (4-methoxyphenyl)- λ3-iodanediyl dia

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