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Dissertations / Theses on the topic 'Hydrazone derivatives'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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1

Garland, Keira. "A Practical Approach to Semicarbazone and Hydrazone Derivatives via Imino-isocyanates." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30725.

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Isocyanates have a broad spectrum of uses and they are used in the production of many products including polyurethane polymers, coatings, adhesives, paints and foams. While isocyanates are widely studied and well represented in the literature, nitrogen substituted isocyanates are quite rare. Amino and imino-isocyanates are examples of nitrogen substituted isocyanates. Previous work within the group studied the reactivity of these intermediates in the alkene aminocarbonylation reaction, and used hydrazones and hydrazides as precursors of nitrogen substituted isocyanates. From there, a secon
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2

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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3

Hauke, Tobias [Verfasser], and Klaus T. [Akademischer Betreuer] Wanner. "Exploring 5-substituted nipecotic acid derivatives in the search for novel GABA uptake inhibitors by means of MS based screening of pseudostatic combinatorial hydrazone libraries / Tobias Hauke ; Betreuer: Klaus T. Wanner." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/1178323943/34.

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4

Clavette, Christian. "Synthesis of Beta-Aminocarbonyl Compounds and Hydrazine Derivatives Using Amino- and Imino-Isocyanates." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32004.

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Over the past recent years, β-aminocarbonyls have been of great interest to medicinal chemists. As a practical method to obtain these moieties, alkene aminocarbonylation, accounting for the formation of a C-N and a C-C bond, has been the subject of limited research efforts (very specific intramolecular metal-catalyzed variants have been reported). Direct aminocarbonylation of alkenes constitutes a challenging and an important potential innovation in the synthesis of β-aminocarbonyls such as β-amino acids. The research efforts described in the present thesis have been primarily directed towards
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5

Jia, Shuanglong. "Multicomponent Reactions toward Heterocycles and Tsuji-Trost Reaction of Allylic Nitro Derivatives." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLY012/document.

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Les réactions multicomposantes jouent un rôle important en chimie organique. Ce sont des réactions qui mettent en jeu au moins trois réactifs de départ et qui permettent d’obtenir des produits considérés comme des éléments intéressants pour la synthèse de molécules complexes ou de composés bioactifs. Grâce à leur versatilité, ces réactions sont considérées comme des outils précieux pour la préparation de bibliothèques de composés organiques dans le domaine de la recherche pharmaceutique et de la synthèse de produits naturels.La réaction de Passerini, combinée à une addition de Michael et à une
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6

Mingle, David. "Synthesis, Characterization and Biological Evaluation of Novel (S,E)-11-[2-(Arylmethylene) Hydrazono] Pyrrolo [2,1-c] [1,4] Benzodiazepine Derivatives." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/etd/3596.

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Pyrrolo [2,1-c] [1,4] benzodiazepine (PBD) is a class of natural products obtained from various actinomycetes which have both anti-tumor and antibiotic activities and can bind to specific sequences of DNA. PBD-dilactam was initially produced using isatoic anhydride and (L)-proline which was then converted to the PBD-thiolactam using Lawesson's reagent. Reaction of thiolactam with hydrazine in ethanol afforded PBD-11-hydrazinyl. Condensation of 11-hydrazinyl PBD with aldehydes possessing various substitutions was performed to obtain (S,E)-11-[2-(arylmethylene) hydrazono] pyrrolo [2,1-c] [1,4] b
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7

Mingle, David, and Abbas G. Dr Shilabin. "Synthesis, Characterization and Biological Evaluation of novel (S, E)-11-[2-(arylmethylene)hydrazono] pyrrolo [2,1-c] [1,4] benzodiazepine derivatives." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/asrf/2019/schedule/212.

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Pyrrolo [2,1-c] [1,4] benzodiazepine (PBD) is a class of natural products obtained from various actinomycetes which have both anti-tumor and antibiotic activities. They can bind to specific sequences of DNA that can trigger a biological response which is of pharmacological interest. PBD can also prevent cell division leading to death of the bacteria. This research focuses on the synthesis of novel 11-hydrazinyl PBD derivatives using a multi-step synthesis. PBD-dilactam was initially produced using isatoic anhydride and (L)-proline which was then converted to the PBD-thiolactam using Lawesson's
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8

Jia, Shuanglong. "Multicomponent Reactions toward Heterocycles and Tsuji-Trost Reaction of Allylic Nitro Derivatives." Electronic Thesis or Diss., Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLY012.

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Les réactions multicomposantes jouent un rôle important en chimie organique. Ce sont des réactions qui mettent en jeu au moins trois réactifs de départ et qui permettent d’obtenir des produits considérés comme des éléments intéressants pour la synthèse de molécules complexes ou de composés bioactifs. Grâce à leur versatilité, ces réactions sont considérées comme des outils précieux pour la préparation de bibliothèques de composés organiques dans le domaine de la recherche pharmaceutique et de la synthèse de produits naturels.La réaction de Passerini, combinée à une addition de Michael et à une
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9

Gormen, Meral. "Synthesis Of Ferrocenyl Substituted Pyrazoles." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/3/12606358/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 incorporation of the essential structural features of pyrazoles with a ferrocene moiety could provide new derivatives with unexpected and/or enhanced biological activities since several ferrocene derivatives have already been shown to be active against a number of tumors. For this reason, we investigated the synthesis of ferrocenyl-substituted pyrazoles, such as 1-alkyl/aryl-5-ferrocenylpyr
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10

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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11

Kuo, Chain-Cheng, and 郭建程. "Design and synthesis of glycosyl hydrazone derivatives as anti-dengue virus agent." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/tb2x97.

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碩士<br>高雄醫學大學<br>藥學系碩士班<br>106<br>Hydrazones have been demonstrated to possess various bioactivities such as antimicrobial, anticonvulsant, analgesic, anti-inflammatory, antiplatelet, and antitumoral activities. In our previous study, a series of N-acylhydrazone compounds were synthesized and evaluated for their anti-dengue virus activity. Although they exhibited potential anti-dengue virus activity, the main drawback is their poor water solubility. Our aim of this study is to introduce the sugar moiety to our previous acylhydrazone skeleton to improve water solubility while keeping or modulati
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12

Govindaiah, Pilli. "Design, Synthesis, Pharmacological and Pharmacoinformatic Analysis of Novel Coumarin-Based Hydrazone Derivatives as Anticancer Drugs." Thesis, 2019. http://ethesis.nitrkl.ac.in/10120/1/2019_PhD_PGovindaiah_515CY1005_Design.pdf.

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Cancer is one of the major causes of death globally after heart disease. To identify potent and selective anticancer drugs with minimum or less side effects is a serious concern and goal of the medicinal chemists. This study focuses on the design, synthesis, pharmacological and pharmacoinformatic evaluation of the novel coumarin-based hydrazone derivatives and accordingly this dissertation is divided into five chapters. The first chapter briefly highlights the chemical properties and synthesis of the coumarin derivatives in addition to the descriptions about cancer and its treatments. Natura
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13

Chen, Ci-Yuan, and 陳啟元. "Reactions of 4-ethoxyazulene derivatives with hydrazines, ethylenediamine and o-phenylenediamine." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/65ud9k.

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碩士<br>中原大學<br>化學研究所<br>93<br>Abstract This thesis studies the formation of 4- ethoxy- 1- ethoxycarbonyl azulene, the synthesis of 4- ethoxy- 1- ethoxycarbonyl- 3- Razulene (formyl, acetyl, trifluoroacetyl), then 4- ethoxy-1- ethoxycarbonyl - 3-Razulene reacts with hydrazine, phenylhydrazine, ethylenediamine, o-phenlenediamine, afford five, seven, six member heterocyclic compound : 1-ethoxycarbonyl-5, 6-dihydro-5H-azuleno[1,8a,8-c,d]-1, 2-diazoine (30) , 1- ethoxycarbonyl- 3-methyl- 5,6- dihydroazuleno[1,8a,8-c,d] -1, 2- diazoine (35), 1-ethoxycarbonyl- 3- trifluoromethyl- 5,6-dihydroazuleno -
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14

Chuang, Sheng-Cheh, and 莊勝絜. "Rhodium-Catalyzed C－H Bond Activation and the Application to the Synthesis of Isoquinoline Derivatives from Hydrazones and Alkynes." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/79627772430231301289.

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15

Wu, Hong-Jhou, and 吳宏洲. "Synthesis of Pyrazolo[1,5-a]pyridine Derivatives via Hydrazine and 4-ene-2,6-diyne-one by Copper(I) chloride-catalyzed." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/38283112889469025155.

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碩士<br>高雄醫學大學<br>醫藥暨應用化學研究所碩士班<br>95<br>Recently, we developed synthetic methods to a series of aromatic compounds such as isoquinolones, phenanthridinones, and biphenyls via anionic cycloaromatization of enediynes. We found that treatment of (Z)-1-phenyltrideca-4-en-2,6-diyn-1-one (78b) with 5 eq hydrazine and 4 eq copper(I) chloride in refluxing CH3CN afforded pyrazolo[1,5-a]pyridine (81) in 85 % yield.
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