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Dissertations / Theses on the topic 'C - hetero'

Author: Grafiati

Published: 18 May 2024

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1

Devaraj, Karthik. "Ruthenium-catalyzed C-H Functionalization of (Hetero)arenes." Doctoral thesis, Uppsala universitet, Organisk kemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-310998.

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This thesis concerned about the Ru-catalyzed C-H functionalizations on the synthesis of 2-arylindole unit, silylation of heteroarenes and preparation of aryne precursor. In the first project, we developed the Ru-catalyzed C2-H arylation of N-(2-pyrimidyl) indoles and pyrroles with nucleophilic arylboronic acids under oxidative conditions. Wide variety of arylboronic acids afforded the desired product in excellent yield regardless of the substituents or functional group electronic nature. Electron-rich heteroarenes are well suited for this method than electron-poor heteroarenes. Halides such as

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2

Subba, Raju. "Studies on the reactions of C - hetero bond formation." Thesis, University of North Bengal, 2015. http://ir.nbu.ac.in/handle/123456789/1854.

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3

Saha, Bittu. "Development of Novel methodologies for the construction of c-hetero bond." Thesis, University of North Bengal, 2018. http://ir.nbu.ac.in/handle/123456789/2823.

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4

Li, Haoran. "Pd-catalyzed C-H bond functionalizations of (hetero)arenes and alkenes : A one step access to poly(hetero)aromatics and styrene derivatives." Thesis, Rennes, Ecole nationale supérieure de chimie, 2020. http://www.theses.fr/2020ENCR0068.

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Afin d'expliquer le contexte de mon travail de recherche, j'ai résumé dans le premier chapitre des informations mécanistiques générales sur l'arylation des liaisons C-H catalysée par le palladium et j'ai détaillé certains travaux sur l'arylation directe en relation avec mes travaux. Mes objectifs étaient d'étudier la réactivité de nouvelles unités synthétiques permettant l'accès direct à des composés bi-(hétéro)aryls ou à des dérivés du styrène. Ensuite, dans les chapitres 2 à 6, j'ai résumé mes travaux de recherche. J'ai étudié l’arylation directes en C2 du Methoxsalen par des chlorures de be

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5

Zhao, Liqin. "Palladium-catalyzed direct arylation via sp² and sp³ C-H activation of hetero(aromatics) and hydrocarbons for C-C bond formation." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S038/document.

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Au cours de cette thèse, nous nous sommes intéressés à l'activation de liaisons sp² et sp³ C-H catalysée par le palladium pour la préparation d'(hétéro)aryl-aryles et de biaryles. Cette méthode est considérée comme attractive pour l'environnement par rapport aux méthodes classiques, tels que Suzuki, Heck, ou Negishi. Tout d'abord, nous avons décrit que la C2-arylation directe de benzothiophènes peut être effectuée par un catalyseur du palladium en l'absence de ligand phosphine avec une grande sélectivité. Nous avons également démontré qu'il est possible d'activer les positions C2 et C5 de pyrr

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6

Öhlenschläger, Kim K. [Verfasser], and C. [Akademischer Betreuer] Barner-Kowollik. "Hetero Diels-Alder Reactions in Material Science / Kim K. Öhlenschläger. Betreuer: C. Barner-Kowollik." Karlsruhe : KIT-Bibliothek, 2014. http://d-nb.info/1082294411/34.

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7

Kirchberg, Sylvia [Verfasser]. "Palladium-katalysierte C-H-Arylierungen von (Hetero)-Arenen mit Arylboronsäuren und TEMPO / Sylvia Kirchberg." München : Verlag Dr. Hut, 2011. http://d-nb.info/1017353379/34.

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8

Sala, Fernanda Angélica. "Estudo da interação entre domínios C-terminais de septinas humanas: implicação na formação e estabilidade do filamento." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/75/75133/tde-10082015-140053/.

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Septinas compreendem uma conservada família de proteínas de ligação a nucleotídeo de guanina e formação de heterofilamentos. Em termos estruturais, elas possuem uma organização comum: um domínio GTPase central, uma região N-terminal e um domínio C-terminal, este último é predito para formar estruturas em coiled coil. Atualmente, o heterocomplexo de septinas humanas (SEPT2/SEPT6/SEPT7) mais bem caracterizado revela a importância do domínio GTPase na formação do filamento, todavia a ausência de densidade eletrônica para os domínios C-terminais faz com que sua função permaneça obscura. Estudos co

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9

Clouston, Laurel L. "The design and synthesis of C¦3 symmetric ligands for lanthanide Lewis acid catalysis of the inverse demand hetero Diels-Alder reaction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ37336.pdf.

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10

O'Connor, Sean M. J. "Application of Tridentate Schiff Base Chromium (III) Complex Catalysts Towards the Total Synthesis of (-)- Lasonolide A and C-Disaccharide Mimics." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/366217.

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This thesis describes the synthetic studies performed utilizing tridentate Schiff base Cr(III) complex catalysts towards the total synthesis of ()-lasonolide A resulting in the completion of synthetic efforts towards the C17-C25 segment. Further summarization is also given on completion of the C7-C16 segment and an overview of future directions toward to the total synthesis of ()-lasonolide A. Both tetrahydropyrans C7-C11 and C19-C23 were to be constructed utilising an asymmetric hetero-Diels–Alder protocol involving Jacobsen’s hetero-Diels–Alder catalyst providing a means to generate a numb

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11

Cuba, Supanta Gustavo. "Efectos del dopaje y la temperatura sobre las propiedades térmicas de hetero-estructuras de C/BN y su potencial uso como sensor ambiental del formaldehído." Doctoral thesis, Universidad Nacional Mayor de San Marcos, 2019. https://hdl.handle.net/20.500.12672/12312.

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Se estudia la influencia del dopaje y de la temperatura sobre las propiedades físicas de hetero-estructuras hexagonales principalmente basadas en carbono y nitruro de boro tanto uni- y bi-dimensionales, este estudio se divide en tres partes. Por un lado, se estudia el efecto del dopaje de nitruro de boro en nanotubos de carbono armchair (6, 6) (hetero-nanotubos de nitruro de boro y carbono) sobre las propiedades del transporte cuántico de fonones y electrones, variando patrones de distribución y concentración de dopaje. Por otro lado, se estudia la forma como afecta la temperatura del sustrato

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12

Potukuchi, Harish Kumar [Verfasser], Lutz [Akademischer Betreuer] Ackermann, and Dietmar [Akademischer Betreuer] Stalke. "Catalytic syntheses and copper- or ruthenium-catalyzed direct C H bond arylations of (hetero)arenes / Harish Kumar Potukuchi. Gutachter: Lutz Ackermann ; Dietmar Stalke. Betreuer: Lutz Ackermann." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2011. http://d-nb.info/1043939148/34.

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13

Weisz, Mario. "Electrothermal device-to-circuit interactions for half THz SiGe∶C HBT technologies." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR14909/document.

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Ce travail concerne les transistors bipolaires à hétérogène TBH SiGe. En particulier, l'auto-échauffement des transistors unitaires et le couplage thermique avec leurs plus proches voisins périphériques sont caractérisés et modélisés. La rétroaction électrothermique intra- et inter-transistor est largement étudiée. En outre, l’impact des effets thermiques sur la performance de deux circuits analogiques est évalué. L'effet d'autoéchauffement est évalué par des mesures à basse fréquence et des mesures impulsionnelles DC et AC. L'auto-échauffement est diminué de manière significative en utilisant

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14

Sahoo, Amit Kumar. "Electro-thermal Characterizations, Compact Modeling and TCAD based Device Simulations of advanced SiGe : C BiCMOS HBTs and of nanometric CMOS FET." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14557/document.

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Ce travail de thèse présente une évaluation approfondie des différentes techniques de mesure transitoire et dynamique pour l’évaluation du comportement électro-thermique des transistors bipolaires à hétérojonctions HBT SiGe:C de la technologie BiCMOS et des transistors Métal-Oxyde-Semiconducteur à effet de champ (MOSFET) de la technologie CMOS 45nm. En particulier, je propose une nouvelle approche pour caractériser avec précision le régime transitoire d'auto-échauffement, basée sur des mesures impulsionelles. La méthodologie a été vérifiée par des mesures statiques à différentes températures a

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15

van, Heteren Peer [Verfasser]. "Cystatin C als Risikofaktor für kardiovaskuläre Ereignisse bei Nierentransplantierten / Peer van Heteren." Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://d-nb.info/1047185237/34.

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16

Drews, Thorsten [Verfasser], C. [Gutachter] Huth, H. P. [Gutachter] Schultheiss, and R. [Gutachter] Hetzer. "Halteapparatkonservierende Mitralchirurgie / Thorsten Drews ; Gutachter: C. Huth, H. P. Schultheiss, R. Hetzer." Berlin : Humboldt-Universität zu Berlin, 2001. http://d-nb.info/1207622540/34.

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17

Rodrigues, Daniela Maffi. "Poli (l?quidos i?nicos) celul?sicos aplicados como catalisadores heterog?neos para transforma??o qu?mica do CO2 em carbonatos c?clicos." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2018. http://tede2.pucrs.br/tede2/handle/tede/8367.

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Submitted by PPG Engenharia e Tecnologia de Materiais (engenharia.pg.materiais@pucrs.br) on 2018-12-03T15:52:09Z No. of bitstreams: 1 Dissertacao DANIELA MAFFI RODRIGUES.pdf: 1641622 bytes, checksum: 7201a3a551a602c84d3776d0f02f7399 (MD5)<br>Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-12-05T13:35:48Z (GMT) No. of bitstreams: 1 Dissertacao DANIELA MAFFI RODRIGUES.pdf: 1641622 bytes, checksum: 7201a3a551a602c84d3776d0f02f7399 (MD5)<br>Made available in DSpace on 2018-12-05T13:50:46Z (GMT). No. of bitstreams: 1 Dissertacao DANIELA MAFFI RODRIGUES.pdf: 164162

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18

Rao, Santhosh. "Molecular Construction Using Carbene and Diboron Systems: Catalytic Transformation of C-C and C-Hetero Atom Bonds." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/5327.

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The thesis presents an unconventional approach for the molecular construction using carbenes as the carbon source, and water as the hydrogen source. A gold-catalyst has been used to transfer the carbenes to effect [2,3]-sigmatropic rearrangement; and tris(pentafluorophenyl)borane-catalyst for the C-C bond functionalization and carbonate transfer reactions. On the other hand, a Pd-catalyzed stereodivergent reduction of alkynes has been achieved using water. The mechanistic details of the hydrogenation have also been probed, and the derived understanding has been applied to construct C-C bonds

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19

Ojha, Devi Prasan. "Palladium Catalyzed Refunctionalizations of Olefins : Novel Strategies for Construction of C-C, C-Hetero Bonds and Homogeneous Hydrogenation." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3841.

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Chapter 1: Metal carbenoids in organic synthesis The chapter describes the phenomena of metal carbenoid insertion reactions in two parts: Part A, and Part B. The study of N-tosylhydrazones as diazo precursor was commenced by Jose Barluenga in 2007,1 which demonstrated an in-situ generation of diazo species and trapping of that with low valent palladium catalyst (Scheme 1). Later, this palladium-carbenoid assumption was supported by few reports. Some of these discoveries were by D. F. Taber in 1986 followed by van Vranken in 1999 & 2001.2 These studies of palladium carbenes were supplemented b

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20

Ojha, Devi Prasan. "Palladium Catalyzed Refunctionalizations of Olefins : Novel Strategies for Construction of C-C, C-Hetero Bonds and Homogeneous Hydrogenation." Thesis, 2015. http://etd.iisc.ernet.in/2005/3841.

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Chapter 1: Metal carbenoids in organic synthesis The chapter describes the phenomena of metal carbenoid insertion reactions in two parts: Part A, and Part B. The study of N-tosylhydrazones as diazo precursor was commenced by Jose Barluenga in 2007,1 which demonstrated an in-situ generation of diazo species and trapping of that with low valent palladium catalyst (Scheme 1). Later, this palladium-carbenoid assumption was supported by few reports. Some of these discoveries were by D. F. Taber in 1986 followed by van Vranken in 1999 & 2001.2 These studies of palladium carbenes were supplemented b

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21

Potukuchi, Harish Kumar. "Catalytic syntheses and copper- or ruthenium-catalyzed direct C H bond arylations of (hetero)arenes." Doctoral thesis, 2011. http://hdl.handle.net/11858/00-1735-0000-0006-B0A3-7.

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22

Rokade, Balaji Vasantrao. "Copper-Catalyzed Novel Oxidative Transformations : Construction of Carbon-Hetero Bonds." Thesis, 2014. http://etd.iisc.ac.in/handle/2005/3479.

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The thesis entitled “Copper-Catalyzed Novel Oxidative Transformations: Construction of Carbon-Hetero Bonds” is divided into two main sections. Section A deals with the utility of azide as a nitrogen source for C-N bond formation, which is further divided into 4 chapters, and section B presents decarboxylative radical coupling reaction for C-heteroatom bond formation which is further divided in to two chapters. Section A Chapter 1 describes an approach for the direct synthesis of nitrile from the corresponding alcohols using azide as a nitrogen source. Nitrile functionality is a versatile an

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23

Rokade, Balaji Vasantrao. "Copper-Catalyzed Novel Oxidative Transformations : Construction of Carbon-Hetero Bonds." Thesis, 2014. http://etd.iisc.ernet.in/2005/3479.

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The thesis entitled “Copper-Catalyzed Novel Oxidative Transformations: Construction of Carbon-Hetero Bonds” is divided into two main sections. Section A deals with the utility of azide as a nitrogen source for C-N bond formation, which is further divided into 4 chapters, and section B presents decarboxylative radical coupling reaction for C-heteroatom bond formation which is further divided in to two chapters. Section A Chapter 1 describes an approach for the direct synthesis of nitrile from the corresponding alcohols using azide as a nitrogen source. Nitrile functionality is a versatile an

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24

Fenner, Sabine. "Sustainable Strategies for Site-Selective C−VC Bond Formations through Direct C−H Bond Functionalizations." Doctoral thesis, 2012. http://hdl.handle.net/11858/00-1735-0000-0006-B090-4.

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25

Hsu, Yuan-Shi, and 許元錫. "The comparative study of electrical and conversion efficiency performance for homo-junction and hetero-junction c-Si solar cells." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/26085868041302747750.

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碩士<br>國立中央大學<br>光電科學與工程學系<br>102<br>In this study, ECR-CVD was used for the deposition of high doping silicon thin films and passivation layers, PE-CVD was used for the deposition of passivation layers. These thin films were deposited on single-crystalline silicon substrate to fabricate the homo-junction and hetero-junction c-Si solar cells. The electrical properties and solar cell performance of homo-junction and hetero-junction c-Si solar cells were investigated. ECR-CVD has advantages about high deposition rate, low working pressure, low ion bombardment and no electrode pollution. But high

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26

Clouston, Laurel L. "The design and synthesis of C₃ symmetric ligands for lanthanide Lewis acid catalysis of the inverse demand hetero Diels-Alder reaction." Thesis, 1998. https://dspace.library.uvic.ca//handle/1828/8721.

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The inverse demand hetero Diels-Alder reaction has been shown to be catalysed by commercially available, air-sensitive lanthanide Lewis acid catalysts such as Yb(fod)₃ . To date there have been no reported examples of enantioselective Lewis acid catalysed reactions of ethyl vinyl ether with crotonaldehyde, the inverse demand hetero Diels-Alder reaction of interest. This Diels-Alder reaction yields dihydropyran products which are key in the synthesis of a number of natural product target molecules, such as carbohydrates. The lack of stereospecificity achieved with known chiral NMR shift reagen

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27

Giguère, Denis. "Synthèse de 4-désoxy hexopyrannoses, C-disaccharides et C-glycosides biologiquement actifs." Thèse, 2009. http://hdl.handle.net/1866/4191.

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Les glucides constituent la classe de molécules organiques la plus abondante et ceux-ci jouent des rôles cruciaux dans divers processus biologiques. De part leur importance médicinale, la préparation des désoxy-sucres, des C-glycosides et des C-disaccharides est devenue un sujet de pointe en synthèse organique. De façon générale, cette thèse décrit une nouvelle synthèse de novo des 4-désoxy hexopyrannoses en plus de la préparation de C-glycosides biologiquement actifs. De plus, une attention particulière a été portée à la préparation de novo de 4-désoxy-C-disaccharides. Dans un premier temps,

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28

Chen, Zhong-Yi, and 陳忠毅. "1. 1. Studies in Synthesis of C-1 Substituted Fulvenes via the Oxidation-Addition of Haloacetyl Halide to fulveneketene Acetal. 2. Traceless Solid-Phase Synthesis of Cyclopenta[c]quinolines and Cyclopenta[c]chromenes via Hetero [6+3] Cycloadditions of Fu." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/12983595954471742161.

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博士<br>國立中正大學<br>化學研究所<br>91<br>1.Studies in Synthesis of C-1 Substituted Fulvenes via the Oxidation-Addition of Haloacetyl Halide to fulveneketene Acetal. In contrast to the [2+2] cycloaddition of fulvenes and ketenes, fulveneketene acetal, 2-chloropentadienylidene-1,3-dioxalane, reacts with a-halo acyl halides to give various C-1 substituted fulvene. Herein we describe the first example of oxidative-addition of a-chloroacetyl chloride to fulveneketene acetal, and formal synthesis of the carbocyclic analogs of Captopril. 2.Traceless Solid-Phase Synthesis of

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29

Costa, Gustavo Franco Ferreira da. "Cymbopogon citratus and its polyphenols as potential phytotherapeutic products: an in vivo approach." Doctoral thesis, 2016. http://hdl.handle.net/10316/29994.

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Tese de doutoramento em Ciências Farmacêuticas, na especialidade de Farmacognosia e Fitoquímica, apresentada à Faculdade de Farmácia da Universidade de Coimbra<br>Cymbopogon citratus (DC). Stapf (Poaceae), commonly known as lemongrass, is a tropical perennial shrub originated from the Southeast Asia. This plant is reported to possess antifungal, insecticidal, anti-diabetic, anti-septic, anti-mutagenic, anti-carcinogenic activities as well as anti-inflammatory. In fact, aqueous extracts of dried leaves are used all over the year in folk medicine for the treatment of peptic ulcers and inflammato

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