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Dissertations / Theses on the topic 'Sparteine'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 January 2023

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1

Canipa, Steven James. "Catalytic asymmetric synthesis using (-)-sparteine and the (+)-sparteine surrogate." Thesis, University of York, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533539.

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2

Hermet, Jean-Paul. "Synthesis and evaluation of (+)-sparteine analogues and total synthesis of (-)-sparteine." Thesis, University of York, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415187.

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3

Buttler, Thomas. "A total synthesis of (+/-)-sparteine." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616083.

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4

Porter, David W. "Sparteine-like diamines for asymmetric synthesis." Thesis, University of York, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369300.

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5

Dearden, Michael. "Synthesis and evaluation of (+)-sparteine-like compounds." Thesis, University of York, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412627.

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6

Meppen, Malte. "The asymmetric and convergent synthesis of 1,2 amino alcohols." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249342.

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7

Norcross, Neil Richard. "Total synthesis of lupin alkaloids of the sparteine group." Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435811.

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8

Firth, James D. "Lithiation/trapping of N-Boc piperazines and synthesis of the (–)-sparteine surrogate." Thesis, University of York, 2014. http://etheses.whiterose.ac.uk/6880/.

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This thesis describes some novel aspects of the s-BuLi mediated lithiation/trapping of N-Boc heterocycles, including a systematic investigation into the lithiation/trapping of N-Boc piperazines. Chapter 2 details an in situ ReactIR™ investigation into the time required for both the lithiation and trapping events of some commonly used N-Boc heterocycles. The remarkable difference in the time taken for trapping with some electrophiles is of particular note. The information garnered in this investigation was used to direct the racemic and asymmetric lithiation of N-Boc piperazines, as described i

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9

Metallinos, Constantinos. "Development of new directed metalation groups for the (-)-sparteine-mediated synthesis of ferrocenes with planar chirality." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ63438.pdf.

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10

Pop, Ionut-Alexandru. "Towards the total synthesis of (-)-sparteine and other lupin alkaloids & new chiral catalysts for asymmetric epoxidations." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/374680/.

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Synthetic routes towards the total synthesis of (−)-sparteine (1.1) have been investigated. An imino-aldol reaction between different ester enolates and chiral sulfinimines was explored to install two of the stereogenic centres. An N-acylimnium precursor was introduced from a selective imide reduction with LiEt3BH and several cyclisation strategies were investigated to install the two remaining stereocenters. Total synthesis of the bicyclic lupin alkaloid (−) lamprolobine (1.107) has been completed in 21% yield over 12 steps as part of the synthetic studies towards 1.1. The target molecule was

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11

Lavaud, François. "Polymérisation anionique du methacrylate de methyle en présence de sparteine : étude cinétique et rôle du ligand dans le contrôle de la propagation." Bordeaux 1, 2001. http://www.theses.fr/2001BOR12439.

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L'étude réalisée porte sur l'utilisation de la spartéine dans la polymérisation anionique du méthacrylate de méthyle, dans l'objectif de stabiliser ainsi les espèces actives en croissance et de conférer à la propagation un caractère contr^olé. Le choix a été fait de recourir à une étude cinétique pour répondre à la question du r^ole joué par un tel ligand vis-à-vis du mécanisme de la polymérisation. A l'aide de deux dispositifs complémentaires (réacteur tubulaire et calorimètre adiabatique), une gamme de concentration en centres actifs allant de 10 puissance -5 à 10 puissance -2 mol. L-1 a pu

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12

Tao, Peng. "Computational studies to understand molecular regulation of the TRPC6 calcium channel, the mechanism of purine biosynthesis, and the folding of azobenzene oligomers." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1166718985.

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13

Vasconcellos, Adriano de [UNESP]. "Sínteses e caracterização de novos catalisadores zeolíticos e sua como suportes inorgânicos para imobilização de lipase produzida por Rhizomucor miehei e seu estudo catalítico na reação de transesterificação do óleo de soja para produção de biodiesel." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/94838.

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Made available in DSpace on 2014-06-11T19:27:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-11-08Bitstream added on 2014-06-13T19:55:53Z : No. of bitstreams: 1 vasconcellos_a_me_sjrp.pdf: 3559439 bytes, checksum: 7626ad7d7fb3ecc2909ae46dc06812db (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Os principais objetivos do presente trabalho de pesquisa são a síntese de novos catalisadores zeolíticos, a avaliação de seus usos como possíveis matrizes para imobilização enzimática, e o uso desse complexo zeólita/enzima como catalisador para produção de biodiesel.

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14

Vasconcellos, Adriano de. "Sínteses e caracterização de novos catalisadores zeolíticos e sua como suportes inorgânicos para imobilização de lipase produzida por Rhizomucor miehei e seu estudo catalítico na reação de transesterificação do óleo de soja para produção de biodiesel /." São José do Rio Preto : [s.n.], 2010. http://hdl.handle.net/11449/94838.

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Orientador: José Geraldo Nery<br>Banca: Eleni Gomes<br>Banca: José Manoel Marconcini<br>Resumo: Os principais objetivos do presente trabalho de pesquisa são a síntese de novos catalisadores zeolíticos, a avaliação de seus usos como possíveis matrizes para imobilização enzimática, e o uso desse complexo zeólita/enzima como catalisador para produção de biodiesel. Inicialmente foram sintetizadas duas classes de zeólitas: faujasita (FAU) e gismondina (GIS), em suas formas sódicas, e estas zeólitas foram convertidas para as formas Cu2+, Ni2+ e Zn2+ por troca iônica. Na sequência foi avaliado o pote

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15

Oba, Boussou Gabriel. "Phosphine-boranes. Cyclométallation stéréosélective et résolution dynamique." Toulouse 3, 2000. http://www.theses.fr/2000TOU30148.

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Ce travail, effectue au laboratoire d'heterochimie fondamentale et appliquee, s'est donne comme objectif la synthese de nouvelles phosphine-boranes originales obtenues a partir de la reaction de cyclozirconation. Dans le chapitre i, une mise au point bibliographique sur les phosphine-boranes comportant plus de 150 references, traite de la nature de la liaison p-b, de leurs parametres physico-chimiques, de leur stabilite et des proprietes chimiques qui en decoulent. Dans la chapitre ii, l'etude de la reaction de cyclozirconation de derives diallyliques et tetraallyliques comportant un heteroele

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16

Langenbach, Philipp. "Enantioselektive Carbolithiierungen zur Darstellung von 3,3-disubstituierten Indolinen." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-50958.

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17

Steiner, Melanie. "Chirale 9-Oxabispidine - Design, enantioselektive Darstellung und Anwendung in der asymmetrischen Synthese." Doctoral thesis, 2010. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-51909.

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Der bekannteste Vertreter der Bispidine ist das Lupinenalkaloid (–)-Spartein, das vor allem in enantioselektiven Deprotonierungen aber auch Übergangsmetall-katalysierten asymmetrischen Reaktionen als Ligand der Wahl eingesetzt wird. Daneben gibt es nur wenige weitere synthetische Vertreter, da keine flexiblen Darstellungsmethoden zu enantiomerenreinen Bispidinen mit variablen Substituenten in 2-endo-Position existieren. Ein zielgerichtetes Design solcher Verbindungen war daher bisher nur eingeschränkt möglich. So sollte in dieser Arbeit eine neue Substanzklasse als chirale Liganden in der asym

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18

Strohfeldt, Katja. "Molekülstrukturen und Reaktionsverhalten von Lithiumorganylen in chiraler Umgebung : chirale alpha-substituierte Lithiumorganyle mit den Heteroelementen Schwefel, Silicium und Stickstoff sowie (-)-Spartein-Addukte vielfach eingesetzter Lithiumalkyl-Reagenzien." Doctoral thesis, 2004. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-8887.

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Die vorliegende Arbeit liefert einen Beitrag zur Synthese alpha-heteroatomstabilisierter Lithiumorganyle (Heteroatom = Schwefel, Silicium, Stickstoff), sowie Struktur/Reaktivtätsstudien auf der Basis von strukturellen Charakterisierungen. Dabei standen verschiedene Methoden zur räumlichen Verknüpfung der alpha-heteroatomstabilisierten Lithiumorganyle mit einer definierten stereochemischen Information im Mittelpunkt der Forschungsarbeit. Die Arbeit gliedert sich in die folgenden drei Bereiche: Studien zu Struktur, Reaktivität und stereochemischen Aspekten von alpha-(Phenylthio)benzyllithium; 2-

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19

Sonnenberg, Michael. "Phasenbezogene Klassifikation von Dienstleistungen im Bereich erneuerbare Energien in den Sparten Windenergie, Biomasse und Solarenergie." 2013. https://ul.qucosa.de/id/qucosa%3A17238.

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In den letzten Jahren entwickelte sich Umweltschutz und die damit verbundene Umwelt-wirtschaft in Deutschland zu einem wesentlichen Wirtschaftsfaktor. Die Unternehmen dieses Sektors stellen verschiedene Güter und Dienstleistungen bereit. Im Jahr 2008 erzielte die Produktion von Umweltschutzgütern ein Volumen von knapp 76 Milliarden (Mrd.) Euro. Vor allem die erneuerbaren Energien tragen zum steten Wachstum bei. Deutschland hatte 2009 mit 15,4 Prozent den weltweit höchsten Anteil am Welthandel von Umweltschutzgütern. Einen wichtigen Bereich bilden hierin die erneuerbaren Energien (EE), die seit

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20

Strohfeldt, Katja [Verfasser]. "Molekülstrukturen und Reaktionsverhalten von Lithiumorganylen in chiraler Umgebung : chirale α-substituierte Lithiumorganyle mit den Heteroelementen Schwefel, Silicium und Stickstoff sowie (-)-Spartein-Addukte vielfach eingesetzter Lithiumalkyl-Reagenzien / vorgelegt von Katja Strohfeldt". 2004. http://d-nb.info/971615470/34.

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21

Riesmeyer, Claudia. "Das Verhältnis zwischen Journalismus und Public Relations. Ressort und Status der Informationsquelle als Einflussfaktoren." Doctoral thesis, 2006. http://hdl.handle.net/11858/00-1735-0000-0006-AF04-5.

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