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Dissertations / Theses on the topic 'Organic hydrazide'

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Published: 4 June 2021

Last updated: 8 February 2022

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1

Zerkout, Saïd. "Synthèse d'hydrazino peptides." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL052N.

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La modification de la liaison amide dans les peptides a plusieurs conséquences potentielles: une biodégradabilité réduite, une possible modulation structurale due aux perturbations du réseau de liaisons hydrogène, et éventuellement, une bio-activité modulée pour l'analogue pseudopeptidique résultant, sans nécessiter de changer les chaines latérales. Nous avons étudie les perturbations structurales induites par la substitution d'une liaison amide par un groupe hydrazide dans diverses séquences mono-, di- et tripeptidiques protégées à leurs deux extrémités par une fonction amide, et contenant l'

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2

Bush, Alexander Graham. "Part A: Design of new camphor-based hydrazide organocatalysts and their applications to enantioselective Friedel-Crafts alkylations Part B: The development of the palladium catalyzed addition of organoborates to alkynyl esters: Synthesis of trisubstituted olefins as single isomers." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28272.

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Part A. Asymmetric synthesis is a growing field in synthetic and medicinal chemistry. Investigations into the use of organocatalysts to engender chirality into organic molecules is of particular interest. Herein we present the study of the efficiency of camphor-based hydrazide organocatalysts in the asymmetric Friedel-Crafts alkylations of N-methylindole with alpha,beta-unsaturated aldehydes. In addition, the applicability of newly designed second-generation camphor-based hydrazide catalysts will be examined.* Part B. The synthesis of trisubstituted olefins represents an intriguing target in o

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3

Aumand, Livia M. "A Studies towards the formation of asymmetric quaternary centres via radical allylation B Applications of chiral hydrazide organocatalysts to Diels-Alder, hydride reduction, and alpha-chlorination reactions C Studies directed towards the synthesis of potential HIV-1 reverse transcriptase inhibitors: 9-Alkylaryl TIBO derivatives." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26843.

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In part A, the attempts at synthesizing quaternary centres via radical reactions are described. Using tartrate acetals as chiral auxiliaries, tertiary bromides were submitted to radical allylation conditions in an effort to form 1,3-dicarbonyl compounds 27 possessing an asymmetric quaternary centre at C2.* Part B describes the synthesis of chiral hydrazide 129 and its ability to catalyze the Diels-Alder reaction is examined. The application of chiral hydrazides 131 to the organocatalytic hydride reduction of alpha,beta-unsaturated aldehydes and the alpha-chlorination of aldehydes is also recou

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4

Karimi, Farhad. "[11C]Carbon Monoxide in Palladium- / Selenium-Promoted Carbonylation Reactions : Synthesis of 11C-Imides, Hydrazides, Amides, Carboxylic Acids, Carboxylic Esters, Carbothioates, Ketones and Carbamoyl Compounds." Doctoral thesis, Uppsala universitet, Avdelningen för organisk kemi, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2931.

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[11C]Carbon monoxide in low concentrations has been used in palladium- or seleniummediated carbonylation reactions such as the synthesis of 11C-imides, hydrazides, amides, carboxylic acids, esters, carbothioates, ketones and carbamoyl compounds. In these reactions aryl iodides have been used in most cases. However, less reactive aryl triflate, chloride and bromides were activated using tetrabutylammonium iodide. The reactivities of nucleophiles may have influence on the radiochemical yield of the 11Clabelled compounds. Carboxyamination of aryl halides using aniline derivatives yielded 10% of t

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5

Thompsett, David. "Hydrazine and carbazate complexes of chromium and manganese : their role in the catalytic decomposition of hydrazine." Thesis, University of Bath, 1987. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376340.

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6

Karimi, Farhad. "[¹¹C]Carbon Monoxide in Palladium- / Selenium-Promoted Carbonylation Reactions : Synthesis of ¹¹C-Imides, Hydrazides, Amides, Carboxylic Acids, Carboxylic Esters, Carbothioates, Ketones and Carbamoyl Compounds." Doctoral thesis, Uppsala University, Organic Chemistry, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2931.

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<p>[<sup>11</sup>C]Carbon monoxide in low concentrations has been used in palladium- or seleniummediated carbonylation reactions such as the synthesis of <sup>11</sup>C-imides, hydrazides, amides, carboxylic acids, esters, carbothioates, ketones and carbamoyl compounds.</p><p>In these reactions aryl iodides have been used in most cases. However, less reactive aryl triflate, chloride and bromides were activated using tetrabutylammonium iodide.</p><p>The reactivities of nucleophiles may have influence on the radiochemical yield of the <sup>11</sup>Clabelled compounds. Carboxyamination of aryl ha

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7

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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8

Ghassemi, Hossein. "Synthesis and properties of novel polyimides utilizing hydrazine." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28451.

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Hydrazine reacts with phthalic anhydride to give a mixture of cyclic hydrazide and N-aminophthalimide. However, the N-aminoimide is exclusively formed in high yield by the reaction of 1,8-naphthalic anhydride with hydrazine. N-aminoimides act as amines and react further with cyclic anhydrides to yield stable bisimides containing an N-N linkage. The syntheses of several bis(N-aminoimide)s from the corresponding bisanhydrides which contain the naphthalic anhydride moiety have been described. Novel high molecular weight polyimides have been synthesized by the reaction of these bis(N-aminoimide)s

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9

Bollan, Hilary Roberta. "The detection of hydrazine and related materials by ion mobility spectrometry." Thesis, Sheffield Hallam University, 1998. http://shura.shu.ac.uk/19366/.

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A technique known as ion mobility spectrometry (IMS), which has been under development for about thirty years, has been shown to be capable of detecting hydrazines at low concentrations but with interference from ammonia. Ammonia is usually present in hydrazine environments, as a breakdown product or a by-product of the human metabolism. This project was undertaken to investigate mechanical and chemical parameters for improved detection of these hydrazines in the presence of ammonia, and for the detection of nitrogen dioxide, by IMS. The subject areas investigated were compatibility of detecto

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10

Chen, Lingyan. "CaSH (camphor sulfonyl hydrazine) and CSI (chiral sulfonimide) organocatalysis." HKBU Institutional Repository, 2010. http://repository.hkbu.edu.hk/etd_ra/1186.

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11

Moore, Peter Robert. "Organic synthesis through radical cyclisation reactions." Thesis, University of Exeter, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337802.

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12

He, Hao. "Organocatalysis : hydrazine and sulfonimide as new functionalities in asymmetric organocatalysis." HKBU Institutional Repository, 2009. http://repository.hkbu.edu.hk/etd_ra/1104.

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13

Mojica, Mike. "Investigation of new synthetic reactions: the synthesis of hydrazines via the Aza-Lossen rearrangement, the synthesis of carbamoyl azides from amines, and deprotection reactions using water at elevated temperatures." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51791.

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This thesis explores three rare synthetic routes: the synthesis of hydrazines via the aza-Lossen rearrangement, the synthesis of carbamoyl azides from amines, and deprotection reactions using water at elevated temperatures. The aza-Lossen reaction was found to be ideal at “infinite dilution” conditions and could be performed with both aryl and alkyl example. Carbamoyl azides could be synthesized in high yields from both aryl and alkyl amines. The carbamoyl azide reaction was found to be much more efficient with Cs (+1) present. Lastly, water at elevated temperatures conditions was efficient at

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14

Tumey, Jonathan Michael. "Synthesis and Reactivity of Sydnone Derived 1,3,4-Oxadiazol-2(3H)-ones." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1515170202954677.

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15

Pinar, Ayse Nur. "Reaction Of Propargyl Aldehydes With Hydrazinium Salts: Synthesis Of Ferrocenyl And Phenyl Substituted Pyrazoles." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609769/index.pdf.

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Pyrazoles have been focus of a large number of investigations in the design and synthesis of novel biologically active agents that show remarkable medicinal activities. Although pyrazoles have been studied for over a century as an important class of heterocyclic compounds, they still continue to attract considerable attention due to the wide range of medicinal activities they possess. Recent studies have shown that combination of a ferrocenyl unit with structural features of pyrazoles can lead to products with enhanced or/and unexpected biological activity since several ferrocene derivatives h

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16

Derrien, Nolwenn. "Palladium catalysed carbonylation of terminal alkenes to α,β-unsaturated esters, &, Allylic C-H functionalisation of unsaturated hydrazine carboxylates to vinyl isoxasolidines". Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/14660.

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In the first part of the thesis, the aim was to devise a new simple catalytic system based on palladium to allow insertion of carbon monoxide in the presence of an alcohol into unsaturated systems with retention of the double bond to give an unsaturated ester. The process is known as oxidative carbonylation. To allow the process to become catalytic, the palladium needs to be reoxidised in situ. Optimal conditions for the catalytic system were developed and a wide range of substrates have been examined. Simple terminal alkenes and alkenes bearing functional group have been successfully carbonyl

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17

Ronsseray, Caroline. "Des isonitriles aux hydrazones : Réactions multicomposants et Synthèses d'hétérocycles." Phd thesis, Ecole Polytechnique X, 2011. http://pastel.archives-ouvertes.fr/pastel-00664985.

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Les réactions multicomposants (MCR) permettent l'obtention monotope de molécules cibles à partir de 3 composants ou plus. Cette méthodologie est très utile, notamment dans la synthèse d'hétérocycles. Les isonitriles, de par leur réactivité particulière, sont les réactifs de prédilection pour ces réactions. Dans un premier temps, une nouvelle synthèse d'oxazoles a été mise au point. A partir des réactifs deux réactions sont en compétitions. Cette étude met en évidence l'importance du choix d'une base dans la chimioselectivité d'un processus. Dans un deuxième temps, un travail a été effectué sur

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18

Vilionskienė, Ingrida. "Krūvius transportuojančių, stabilios amorfinės būsenos hidrazonų, azinų bei antrachinono darinių sintezė ir savybės." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050726_104916-89724.

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The aims of the work were as follows: • synthesis of branched dimers with stable amorphous state possessing tiophenylsulphide, sulphide and hydroxygroups in the linking fragment of chromophores from aromatic and heteroaromatic alde6 hyde phenylhydrazones. A thorough study of physical and optoelectrographic properties of these charge-transporting compounds; • synthesis of new crosslinkable charge transporting molecular glasses exhibiting high charge carrier mobilities, high morphological stability; • design and synthesis of new hole transporting molecular glasses and polymers (from 9-(2,3-epoxy

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19

Yazici, Ceyda. "Synthesis Of 4-iodopyrazole Derivatives." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609750/index.pdf.

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Pyrazoles have been studied for over a century as an important class of heterocyclic compounds and continue to attract considerable interest due to the broad range of biological activities they possess. The electrophilic cyclization of the acetylenic hydrazones initiated by molecular iodine could provide new ways of synthesizing biologically active 4-iodopyrazole derivatives, which are important precursors for the synthesis of highly substituted pyrazole derivatives. For this reason, we investigated the synthesis of 4-iodopyrazole derivatives, such as 1-aryl- 5-alkyl/aryl-4-iodopyrazoles, star

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20

Davis, Randon Emerson. "Development and Synthesis of 7-Alkylguanosine Pronucleosides for Application in Chemical Solid-State Oligoribonucleic Acid Synthesis." Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1595274318375068.

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21

Gomes, Patricia Ramos. "Síntese, caracterização e avaliação biológica de fenilhidrazonas derivadas de análogos da curcumina." Universidade Federal de Juiz de Fora, 2011. https://repositorio.ufjf.br/jspui/handle/ufjf/2070.

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22

Haelters, Jean-Pierre. "Synthèse de dérivés phosphono-indoliques-benzofuranniques et -pyrroliques à partir d'hydrazones phosphonates." Brest, 1987. http://www.theses.fr/1987BRES2002.

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Des derives phosphonoindoliques sont prepares par cyclisation d'arylhydrazones d'oxoalkylphosphonates selon fisher et par cyclodeshydratation d'arylamino-1 et arylamino-3 oxo-2 propylphosphonates selon bischler. Des indolyl-2 et indolyl-3 phosphonates, des indolylmethyl-2 et des indolylmethyl-3 phosphonates diversement substitues et leurs acides phosphoniques correspondants sont decrits. Toutes structures sont analysees par rmn **(1)h, **(31)p et 1**(3)c. L'analogue phosphore de l'intermediaire a aussi ete prepare. L'extention de la reaction de bischler aux aryloxycetones permet d'atteindre de

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23

Teng, Jhih Syuan, and 鄧智烜. "Effect of Surface Treatment on Multi Walled Carbon Nanotubes by Organic Hydrazine." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/w4569e.

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碩士<br>國立清華大學<br>先進光源科技學位學程<br>104<br>In this study, the C2H2 was used as carbon source in the chemical vapor deposition to grow carbon nanotubes at 600oC by controlling both gas flow rate of H2 and Ar. Through changing the gas flow rate, we successfully grew multi-wall carbon nanotubes (MWCNTs). To understand the doping effects on the functionalized MWCNTs, different organic hydrazines with functional groups such as phenyl,–NO2 or –NH2 were used to chemically treat MWCNTs. To characterize the functionalization of MWCNTs, we employed the Field Emission Scanning Microscope for the morphology, an

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24

"Probing Receptors and Enzymes with Synthetic Small Molecules." Doctoral diss., 2013. http://hdl.handle.net/2286/R.I.16428.

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abstract: ABSTRACT Manipulation of biological targets using synthetic or naturally occurring organic compounds has been the focal point of medicinal chemistry. The work described herein centers on the synthesis of organic small molecules that are targeted either to cell surface receptors, to the ribosomal catalytic center or to human immunodeficiency virus reverse transcriptase. Bleomycins (BLMs) are a family of naturally occurring glycopeptidic antitumor agents with an inherent selectivity towards cancer cells. DeglycoBLM, which lacks the sugar moiety of bleomycin, has much lower cytotoxicity

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25

Lévesque, Éric. "Techniques de catalyse et de flux continu pour faciliter la fermeture de molécules cycliques tendues." Thèse, 2016. http://hdl.handle.net/1866/19520.

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Cette thèse décrit l’exploration de techniques de catalyse et de flux continu pour faciliter la fermeture de molécules cycliques tendues. En premier lieu, un catalyseur de palladium permet de fermer un hétérocycle aromatique tendu, la structure benzo[a]imidazo[2,1,5-c,d]indolizine.16 La tension de cycle contribue à donner au système  hautement délocalisé de ces molécules des propriétés photophysiques intéressantes, différentes de celles de leurs analogues non tendus.21,33 Il a été démontré que leur longueur d’onde d’émission maximale peut être modulée de manière prévisible en modifiant les g

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26

Arseneault, Pierre-Marc. "Étude de l’association supramoléculaire bi- et tridimensionnelle d’oximes et d’hydrazones trigonales." Thèse, 2011. http://hdl.handle.net/1866/7016.

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Les concepts de la chimie supramoléculaire peuvent être exploités avantageusement pour contrôler la structure et les propriétés des matériaux moléculaires. Dans une approche productive, les composantes moléculaires du matériau peuvent être choisies pour pouvoir s'engager dans des interactions fortes et prévisibles avec leurs voisins. Cette stratégie, appelée la tectonique moléculaire, est caractérisée par la préparation de molécules particulières appelées tectons (du grec tectos, qui signifie constructeur) qui, par design rationnel, s’associent de manière prévisible via de multiples interactio

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27

Mishra, Sandeep Kumar. "Study of Diverse Chemical Problems by NMR and the Design of Novel Two Dimensional Techniques." Thesis, 2017. http://etd.iisc.ernet.in/2005/3558.

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The research work reported in this thesis is focused on the chiral analysis, quantification of enantiomeric composition, assignment of absolute configuration of molecules with chosen functional groups. The weak intra-molecular hydrogen bonding interactions are detected by exploiting several multinuclear and multi-dimensional techniques. Pulse sequences have been designed to manipulate the spin dynamics to derive specific information from the complex NMR spectra encountered in diverse situations. Broadly, the thesis can be classified in to three sections. The section I containing two chapters r

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