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Dissertations / Theses on the topic 'Gelsemium'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 August 2024

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1

Wilkinson, Mark C. "A [4+3] cycloaddition strategy for the synthesis of gelsemine." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342482.

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2

Kuzmich, Daniel. "Gelsemium alkaloids : a total synthesis of dl-21-oxogelsemine /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487864485228496.

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3

Venard, Christine. "Régulation de la neurostéroïdogenèse dans la moëlle épinière et le système limbique par la gelsémine er Gelsemium sempervirens : Analyse cellulaire et implications neurophysiologiques." Université Louis Pasteur (Strasbourg) (1971-2008), 2008. https://publication-theses.unistra.fr/public/theses_doctorat/2008/VENARD_Christine_2008.pdf.

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La gelsémine synthétique, principe actif majoritaire de Gelsemium sempervirens, et la glycine stimulent la biosynthèse d’alloprégnanolone dans la moelle épinière (ME) de rat. De même, les dilutions homéopathiques de gelsémine et de Gelsemium sempervirens augmentent la production d’alloprégnanolone dans la ME et le système limbique. La strychnine, qui n’induit d’elle-même aucune modification de la neurostéroïdogenèse, bloque totalement les effets stimulateurs de ces substances démontrant l’implication des récepteurs glycinergiques dans les mécanismes d’action de ces composés. Ces résultats obte

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4

Bainbridge, Jeremy D. E. "Synthetic studies towards gelsemine." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389255.

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5

Fraser, Rebecca Jane. "Synthetic studies towards gelsemine." Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403697.

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6

Aponte, Jennifer. "Towards the total synthesis of gelsemine." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4816/.

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Discovered in 1870, in the roots of Gelsemium sempervirens, gelsemine has attracted the attention of numerous research groups over the years. Chapter 1 discusses the isolation and structure elucidation of this cage-like alkaloid, along with the synthetic strategies developed to assemble the densely functionalised hexacyclic skeleton. An overview of the project and optimisation of the synthetic route to the gelsemine core structure are presented in Chapter 2. This sequence involves a 4+3 cycloaddition, a novel access to \(\alpha\) \(\beta\)-unsaturated esters and an elimination - Michael addi

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7

Berber, Karatepe Gulen. "Model studies towards the synthesis of gelsemine." Thesis, University of East Anglia, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302082.

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8

Wu, Shung C. "Approaches to a Total Synthesis of Gelsemine." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1391769463.

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9

Sims, Rupert Oliver. "A photochemical approach towards the synthesis of gelsemine." Thesis, University of Sussex, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.439622.

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10

Dutton, Jonathan Keith. "Approaches to the synthesis of gelsemine and related alkaloids." Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291086.

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11

Byrne, Paul. "A novel photochemical approach towards the synthesis of gelsemine." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250186.

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12

Tercel, Moana. "New routes to spiro-oxindoles for the synthesis of gelsemine." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317870.

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13

Duff, Peter Thomas. "(A) Synthetic studies towards gelsemine : (B) A radical abstraction study." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359294.

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14

Ha, Deok-Chan. "Part I: Synthesis of carbapenems and aminosaccharides ; Part II: Studies toward a synthesis of gelsemine /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487324944215364.

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15

Lee, Chih-Shone. "Part I. Studies toward a synthesis of gelsemine using free radical cyclization reactions ; Part II. Asymmetric synthesis of ?-lactams /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487594970651228.

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16

Lam, Jonathan K. "Part I| Ring-Rearrangement Metathesis of Himbert Arene-Allene Cycloadducts for the Rapid, Modular Construction of Complex Molecular Scaffolds. Part II| Application of Zincke Aldehydes Toward the Synthesis of Gelsemine." Thesis, University of California, Irvine, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3646740.

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<p> Developing new synthetic methods and strategies is an important area of research in organic chemistry. Especially useful are transformations that rapidly and rationally generate complex molecular architectures, with multiple new bonds and new stereocenters, from simple, achiral and modular precursors. This dissertation discusses the synthetic investigation and exploitation of two such reactions.</p><p> In PART I, the intramolecular Diels–Alder (IMDA) reaction of aromatic dienes and allene dienophiles, utilized in conjunction with ring-rearrangement metathesis (RRM) to prepare angul

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17

Mistry, Raakhee Gunvant. "The efficacy of a homoeopathic flu complex (arsenicum iodatum, gelsemium sempervirens, eupatorium perfoliatum and ferrum phosphoricum) in the treatment of influenza type syndrome." Thesis, 1999. http://hdl.handle.net/10321/2201.

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Dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Homoeopathy in the Faculty of Health at Technikon Natal.<br>The purpose of this investigation was to evaluate the effect of a homoeopathic flu complex consisting of Arsenicum album, Gelsemium sempervirens, Eupertorium perfoliatum and Ferrum phosphoricum in the treatment of influenza type syndrome in terms of the patient's response to the treatment and the patient's oral temperature. It was hypothesised that the flu complex would reduce the severity and duration of symptoms in patien

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18

Manson, Jessamyn. "The Ecological Consequences and Adaptive Function of Nectar Secondary Metabolites." Thesis, 2009. http://hdl.handle.net/1807/19290.

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Plants are under selection to simultaneously attract pollinators while deterring herbivores. This dilemma can lead to tradeoffs in floral traits, which are traditionally thought to be optimized for pollinators. My dissertation addresses the ecological costs and putative functional significance of nectar secondary metabolites, a paradoxical but widespread phenomenon in the angiosperms. I investigate this issue from the pollinator’s perspective using a series of controlled laboratory investigations focused primarily on the bumble bee Bombus impatiens and the nectar alkaloid gelsemine, from Ge

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19

Liu, Gang. "Stereocontrolled total synthesis of (+/-)-gelsemine." Thesis, 1996. http://hdl.handle.net/1911/16928.

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Gelsemine (1) has been recognized as the major alkaloid component of Gelsemium sempervirens since 1870. It has attracted numerous synthetic efforts since the 1960s due to its unique rigid, hexacyclic cage structure. The first completely stereocontrolled total synthesis of gelsemine (1) via 21-oxogelsemine (3) is described herein. This synthesis features a stereospecific condensation between cyclopropyl carboxaldehyde (240) and 4-iodo-oxindole (259), facile construction of the tetracyclic intermediate (262) through a novel application of divinylcyclopropane-cycloheptadiene rearrangement, and an

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20

JIAN, ZHENG-ZHENG, and 簡丞正. "Approaches towards gelsemine via organo-iron complexes I:addition of Cyanide." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/06027499823809816755.

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