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Dissertations / Theses on the topic 'Hydroxylation reactions'

Author: Grafiati

Published: 18 May 2024

Last updated: 25 July 2025

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1

Bhowmick, Rupa. "Transition metal-ion mediated hydroxylation reactions." Thesis, University of North Bengal, 1993. http://hdl.handle.net/123456789/867.

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2

Joseph, Jan Felix [Verfasser]. "Metabolism of androstane derivatives with focus on hydroxylation reactions / Jan Felix Joseph." Berlin : Freie Universität Berlin, 2016. http://d-nb.info/1122438877/34.

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3

Boldovjaková, Tatiana. "Post-polymerační modifikace polyolefinů pro přípravu hydroxylovaných makroiniciátorů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-432943.

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The diploma thesis deals with post-polymerization hydroxylation of polypropylene in solid state. Regarding the literature review, polypropylene was hydroxylated by radical grafting in aqueous solution of potassium persulfate at 100 °C, under nitrogen atmosphere for 60 minutes. Hydroxylation of polypropylene was performed at different concentrations of potassium persulfate (1; 5; 10 mol. %) and two different water/potassium persulfate molar ratios. The effects of reaction system composition and reaction conditions on reaction efficiency, extent of side reactions, thermal and rheological propert

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4

Bahrami, Atieh. "Immobilization of cytochrome P450 BM3 from Bacillus megaterium on magnetic nanoparticles to develop an effective biocatalyst for hydroxylation reactions." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/34494.

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Les catalyseurs chimiques sont utilisés dans différents procédés de synthèse. Cependant, la pollution qu'ils causent sur l'environnement n’est pas prise en considération. Les procédés de synthèse chimique nécessitent généralement un grand volume de solvants organiques, produisant d’énormes quantités de déchets chimiques, souvent toxiques et non dégradables. Le remplacement des catalyseurs chimiques par des biocatalyseurs (enzymes) pourrait donc bénéficier de leur nature écologique et de leur grande sélectivité envers les produits désirés. Néanmoins, la faible activité et stabilité des enzymes

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5

Bredendiek, Felix [Verfasser]. "Orthogonal Analytical Approaches for the Investigation of Specific Metabolic Pathways of 17α-Methyltestosterone with the Focus on Hydroxylation Reactions / Felix Bredendiek". Berlin : Freie Universität Berlin, 2021. http://d-nb.info/1233986848/34.

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6

Burg, Finn [Verfasser], Thorsten [Akademischer Betreuer] Bach, Mathias [Gutachter] Senge, Thorsten [Gutachter] Bach, and Wolfgang [Gutachter] Eisenreich. "Bioinspired Site- and Enantioselective Hydroxylation Reactions Enabled by Molecular Recognition / Finn Burg ; Gutachter: Mathias Senge, Thorsten Bach, Wolfgang Eisenreich ; Betreuer: Thorsten Bach." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1215837895/34.

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7

Förster, Anja. "Ab-initio studies of reactions to functionalize carbon nanotubes." Bachelor's thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-103907.

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Since the rediscovery of carbon nanotubes (CNTs) due to the publication of Sumio Iijima's article Helical microtubules of graphitic carbon in the magazine Nature in 1991 the interest in carbon nanotubes has rapidly increased. This bachelor thesis also deals with this popular material with the aim to functionalize CNTs for further uses in the microelectronic industry. A promising approach is the functionalization of the CNTs with metal nanoparticles or metal films. To achieve this, one can perform an atomic layer deposition (ALD) on CNTs. In the present work the Trimethylaluminum (TMA) ALD i

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8

Gupta, Puneet [Verfasser], Max C. [Akademischer Betreuer] [Gutachter] Holthausen, and Siegfried [Gutachter] Schindler. "Hydroxylation reactions in bioinorganic models for copper enzymes : a density functional theory assessment / Puneet Gupta. Betreuer: Max C. Holthausen. Gutachter: Max C. Holthausen ; Siegfried Schindler." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2016. http://d-nb.info/1103571826/34.

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9

Wu, Ju. "Electrochemical and Non-electrochemical Oxidative Dearomatization Reactions of Indoles." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS368.

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L'électrochimie est apparue comme un puissant outil de synthèse durable en chimie organique, qui évite l'utilisation d'un oxydant stoechiométrique externe et permet le développement de méthodes de difonctionnalisation très efficaces et sélectives des indoles dans des conditions douces. L'utilisation de médiateurs redox pour réaliser l'électrolyse indirecte a gagné en importance ces dernières année, ce qui offre de nombreux avantages par rapport à l'électrolyse directe. Les réactions de désaromatisation des hétéroarènes achiraux, et en particulier des indoles, donnent des structures tridimensio

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10

Hillen, Michael [Verfasser]. "Stabilization of physiology and C-H hydroxylation rates of whole-cell biocatalysts by reaction engineering / Michael Hillen." Aachen : Shaker, 2019. http://d-nb.info/1188552678/34.

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11

Mirghani, Rajaa A. "Quinine metabolism in man : emphasis on the 3-hydroxylation as a biomarker reaction for the activity of CYP3A4 /." Stockholm : [Karolinska institutets bibl.], 2002. http://diss.kib.ki.se/2002/91-7349-174-8.

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12

Dogan, Sengul Dilem. "Regioselectivity In The Ene Reaction Of Singlet Oxygen With Cyclic Alkenes And Application Of Ene Reaction To Stereoselective Synthesis Of Carbaheptopyranose Derivatives." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612648/index.pdf.

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In the first part of this thesis is related to the regioselectivity in ene reaction of singlet oxygen with cyclic alkenes. The photooxygenation of 1-methyl-, 2,3-dimethyl-, 1,4-dimethylcyclohexa-1,4-dienes, 1,2,3,4,5,8-hexahydronaphthalene (16) and 2,3,4,7-tetrahydro-1H-indene (17) which are readily available through Birch reduction, yielded the ene products. The formed endocyclic dienes were trapped by the addition of singlet oxygen to give corresponding bicyclic endoperoxy-hydroperoxides. In the case of 1-methylcyclohexa-1,4-diene (13) and 1,4-dimethyl-cyclohexa-1,4-diene (15), cis-effect de

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13

Marguerit, Mélanie. "Désaromatisation hydroxylante de phénols par des réactifs iodés hypervalents : application à la synthèse de substances naturelles." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13924/document.

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La réaction de désaromatisation hydroxylante de phénols (HPD) est un outil puissant pour accéder de façon biomimétique, en une seule étape à partir de 2-alkylphénols, aux ortho-quinols, c’est-à-dire les 6-alkyl-6-hydroxycyclohexa-2,4-diénones. Ces synthons peuvent être présentés tels quels par de nombreux produits naturels mais peuvent aussi servir d’intermédiaires hautement fonctionnalisés pour la construction rapide d’architectures structurales complexes. L’acide o-iodoxybenzoïque (IBX), un réactif de type iodane-?5, et sa formulation stabilisée non-explosible (SIBX) se sont révélés particul

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14

Hutt, Jean. "Synthese d'analogues de la vitamine d::(3) : synthese chirale de composes polyhydroxyles." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13326.

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La transformation de la cfarvone en quatre diastereoisomeres precurseurs du cycle a des dihydrovitamines et dihydrotachysterols est decrite dans la premiere partie. Par couplage d'un acetylure derive des cycles c/d de la vitamine d::(3) avec la cetone precurseur du cycle a, puis sa formation du systeme dienique a l'aide de titane a basse valence nous avons obtenu des dihydrotachysterols majoritairement. D'un autre cote, l'utilisation de sulfoxydes optiquement actifs dans l'intention de creer des centres hydroxyles chiraux et son application a la synthese du fragment polyhydroxyle de l'amphoter

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15

Chabut, Barbara. "Complexes binucléaires à fer non-heminique : activité biomimétique et échange de ligands." Université Joseph Fourier (Grenoble ; 1971-2015), 1997. http://www.theses.fr/1997GRE10234.

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Notre travail s'inscrit dans le cadre de la recherche de complexes modeles de sites actifs binucleaires d'enzymes a fer non heminique et plus particulierement de l'hemerythrine et de la methane monooxygenase. Pour cela, nous avons synthetise des composes dans lesquels le centre binucleaire est dissymetrique, c'est a dire que les deux ions metalliques sont dans des environnements differents. Ainsi lors de la synthese de complexes a valence mixte, fe#i#i#ife#i#i, l'ion ferrique est dans un environnement n#3o#3 alors que l'ion ferreux se trouve dans un environnement n#2o#3x, un ligand exogene com

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16

Renaud, Jean-Paul. "Oxydations d'alcanes et d'alcènes par des systèmes métalloporphyriniques modelés du cytochrome P-450." Paris 6, 1986. http://www.theses.fr/1986PA066139.

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La synthèse d'une pophyrine de fer à "anses de panier" chirale comportant des aminoacidés de configuration déterminée est décrite. On a étudié sa pureté optique et sa conformation en solution. Dans une deuxième partie on décrit un nouveau système oxydant catalytique utilisant l'eau oxygénée en présence d'une porphyrine de manganèse et d'imidazole permettant la conversion quantitative d'alcènes en époxydes et d'alcanes en alcools et cétones.

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17

Purwanto, Edy. "The synthesis of polyol from rice bran oil (RBO) through epoxidation and hydroxylation reactions." Thesis, 2010. http://hdl.handle.net/2440/64753.

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Polyurethanes are valuable polymers with a wide variety of applications. They are normally produced from polyol feedstocks derived from petroleum. As petroleum is a non-renewable resource, an alternative source of feedstock is sought. A potential source is rice bran oil. However, far too little attention has been paid to the utilization of rice bran oil as a potential raw material to produce polyol as it contains unsaturated fatty acids that can be converted to polyol and is the by product of rice milling process and available at very low cost. There are two sequential processes to produce pol

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18

Metz, Sebastian [Verfasser]. "QM,MM investigations on the hydroxylation reactions of molybdopterin-containing enzymes / vorgelegt von Sebastian Metz." 2009. http://d-nb.info/100118081X/34.

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19

Hakki, Tarek [Verfasser]. "Development of efficient cytochrome P450-dependent whole-cell biotransformation reactions for steroid hydroxylation and drug discovery / von Tarek Hakki." 2008. http://d-nb.info/1007545569/34.

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20

Tu, Li-Chun, and 塗立群. "Enzymatic Kinetics: The hydroxylation and epoxidation reactions of small alkanes and alkenes as mediated by the particaulate methane monooxygenase from Methylococcus capsulatus(Bath)." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/txzw3d.

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碩士<br>國立清華大學<br>化學系<br>92<br>Abstract Various deuterated propanes and butanes have been synthesized to serve as mechanistic probes to explore the C-H hydroxylation occurring at the hydrophobic pocket within the particulate methane monooxygenase (pMMO) from M. capsulatus (Bath). The enantiomeric excess (ee) of the oxidation products for [1,1,1-2H3]butane and [1,1,1,4,4,4-2H6]butane was determined to be 94% and 86%, respectively, in favor of the formation of the 2R-alcohol. According to our previous experiment, in the case of [2,2-2H2]butane, the insertion of the CH3CD2- end was more favorable

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21

Förster, Anja. "Ab-initio studies of reactions to functionalize carbon nanotubes." Bachelor's thesis, 2012. https://monarch.qucosa.de/id/qucosa%3A19831.

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Since the rediscovery of carbon nanotubes (CNTs) due to the publication of Sumio Iijima's article Helical microtubules of graphitic carbon in the magazine Nature in 1991 the interest in carbon nanotubes has rapidly increased. This bachelor thesis also deals with this popular material with the aim to functionalize CNTs for further uses in the microelectronic industry. A promising approach is the functionalization of the CNTs with metal nanoparticles or metal films. To achieve this, one can perform an atomic layer deposition (ALD) on CNTs. In the present work the Trimethylaluminum (TMA) ALD i

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