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Dissertations / Theses on the topic 'Isoquinoline. Alkaloids'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Streetley, Guy Bradwell. "New approaches for the asymmetric synthesis of pyrroloisoquinoline and isoquinoline alkaloids." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/34917.

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Pyrroloisoquinoline (n = 1) and the pyridoisoquinoline (n = 2) ring systems (2) are found to be the major structural motif of the Erythrina and the protoberberine group of alkaloids, respectively. We have recognised that suitable bicyclic lactams (1) could act as precursors, in an intramolecular N-acyliminium ion-mediated cyclisation, resulting in a stereoselective approach to the core of the Erythrina and protoberberine ring systems. [Illustration omitted.] Access to the tetracyclic core of the Erythrina alkaloids (3) through the application of N-acyliminium ion chemistry is well established

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2

Si, Chong. "Synthesis of Cortistatin Alkaloids and a Versatile Synthesis of Isoquinolines." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10444.

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The cortistatins are a recently identified class of marine natural products that were found to exhibit potent and selective inhibition of human umbilical vein endothelial cells (HUVECs), making them promising leads for the development of anti-angiogenic drugs. In our synthesis, we envisioned that natural cortistatins and unnatural analogs could be prepared by late-stage introduction of isoquinolines to 17-keto precursors, and that these differentially substituted precursors could all be derived from a common key intermediate 112. We developed a robust synthetic route to prepare gram quantities

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3

Carvalho, Kaline Rodrigues. "Bioactive alkaloids and phenolic Hippeastrum solandriflorum (Lindl.) - Amaryllidaceae." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13544.

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This work describes the phytochemical study of Hippeastrum solandriflorum(Amaryllidaceae)aiming the isolation and structural elucidation of new bioactive compounds, as well as its pharmacological investigation. The chemical investigation realized with the EtOH extract from bulbs, through chromatographic methods, including HPLC (reverse phase), resulting inthe isolation of ten compounds: a furan derivative: 5-(hydroxymethyl)furan-2-carbaldehyde(HS-1), two phenolic derivatives: piscidic acid (HS-2), eucomic acid (HS-3), and seven isoquinoline alkaloids: narciclasin ( HS-4), 2α-hydroxypseudo

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4

Tims, Michael C. "The chemical ecology of Hydrastis canadensis L. (Ranunculaceae) effects of root isoquinoline alkaloids on the Hydrastis endophyte, Fusarium oxysporum /." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/4052.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Cell Biology & Molecular Genetics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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5

Brine, Natalie Dawn. "Investigation of the phytochemistry and biological activity of isoquinoline alkaloids isolated from the South African medicinal plants, cyrtanthus sanguineus (Lindl.) walp. and cyrtanthus obliquus (L.f.)ait." Doctoral thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/3274.

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Bibliography: p. 128-140.<br>The term "traditional medicine" refers to the ways of protecting and restoring health that existed before the arrival of modern medicine. These approaches to health belong to the traditions of each country and have been handed down from generatio to generation.

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6

Bender, Christoph. "Stereoselektive Synthese neuartiger 1,2-Dihydroisochinoline als Vorstufen für die Alkaloidsynthese." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2008. http://dx.doi.org/10.18452/15728.

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Ausgangspunkte der vorliegenden Arbeit waren stereoselektive Synthesen von Reissert-Verbindungen über chirale N-Acylisochinoliniumsalze. Es galt die Konfiguration der erhaltenen Produkte zu beweisen und deren Synthesepotential zu erforschen. Ein Ziel dieser Arbeit war es, weiterführende Reaktionen für die Synthese von alkaloidanalogen Substanzen zu entwickeln. Es gelang, die Reissert-Reaktion mit Chlorameisensäurementhylester erfolgreich auf andere Heterocyclen als Isochinolin auszudehnen. Die Annahme eine stereoselektiven Verlaufes mußte korrigiert werden. Das Reissert-Produkt konnte mit eine

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7

Rinaldi, Maria Valeria Nani. "Avaliação da atividade antibacteriana e citotóxica dos alcalóides isoquinolínicos de Annona hypoglauca Mart." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/9/9138/tde-28032008-134727/.

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Annona hypoglauca Mart. foi coletada em área inundada da Floresta Amazônica, próximo à Manaus (Brasil). Os alcalóides foram obtidos do extrato bruto do caule por partição ácido-base, e a partir do resíduo dessa extração foi realizada a partição com solventes de diferentes polaridades, originando as frações livres de alcalóides. A partir da análise de CG-EM dos alcalóides totais foi possível caracterizar sete alcalóides aporfínicos (actinodafinina, anonaina, glaucina, isoboldina, isodomesticina, nornuciferina e roemerina) e possivelmente duas protoberberinas (esculerina e caseadina). Os alcalói

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8

Siqueira, Carlos Alberto Theodoro. "Aspectos químicos e atividade antiprotozoária in vitro de Annona coriacea Mart. (Annonaceae)." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/9/9138/tde-31012011-140840/.

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Estudos anteriores dos alcalóides totais (AT) de Annona coriacea Mart. (Annonaceae) revelaram atividade antiprotozoária promissora. No presente trabalho, realizou-se o fracionamento biomonitorado dos AT de folha e selecionaram-se duas frações ativas (100% morte), frente às formas promastigotas de Leishmania (L.) chagasi in vitro, para a caracterização dos alcalóides, por CG-EM. Os AT bioativos de caule (100% morte) foram analisados sem fracionamento prévio. Em paralelo, efetuou-se amostragem de três exemplares de A. coriacea, analisados em conjunto, para o acompanhamento da variação do rendime

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9

Santos, Maria de Fátima Costa. "Estudo fitoquímico e investigação da atividade citotóxica das folhas e cascas do caule de Guatteria pogonopus (Annonaceae)." Universidade Federal de Sergipe, 2015. https://ri.ufs.br/handle/riufs/6090.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This paper presents the results obtained of the phytochemical bioguide of methanol extracts of the leaves and stem bark of Guatteria pogonopus Mart., a species belonging to the family Annonaceae. The botanical material (leaves and stem bark) were collected in the National Park Serra de Itabaiana (PARNA), Sergipe, Brazil. The extracts were obtained by maceration method at room temperature initially with hexane and then methanol, resulting in the hexane (EHF e EHC) and methanol (EMF e EMC) extracts, respectively. The methanol extr

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10

Chow, Yit Lai. "Caenorhabditis elegans as a whole organism screening system for isoquinoline alkaloid bioactivities." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188834.

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11

Morishige, Takashi. "Molecular characterization of O-methyltransferases involved in isoquinoline alkaloid biosynthesis in Coptis japonica." Kyoto University, 2002. http://hdl.handle.net/2433/149491.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第9734号<br>農博第1283号<br>新制||農||850(附属図書館)<br>学位論文||H14||N3697(農学部図書室)<br>UT51-2002-J516<br>京都大学大学院農学研究科応用生命科学専攻<br>(主査)教授佐藤文彦, 教授關谷次郎, 教授島田幹夫<br>学位規則第4条第1項該当

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12

Chan, Eddy Tsz Tak. "Unsaturated sulfoxides in organic synthesis : a new furan synthesis and total synthesis of isoquinolone alkaloids." HKBU Institutional Repository, 1991. https://repository.hkbu.edu.hk/etd_ra/3.

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13

Gatland, Alice Elizabeth. "Palladium-catalysed enolate arylation in the synthesis of isoquinolines." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:f106760d-2375-4d56-81b2-faa6ee96cabc.

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<strong>Chapter 1. Introduction</strong> Scientific background on the development of homogeneous palladium-catalysed cross coupling reactions, focusing on the α-arylation reaction of enolates and its application to the synthesis of heteroaromatic compounds. The classical syntheses of isoquinolines are discussed, followed by an account of modern methods for their synthesis, including the recent α-arylation-based methodology developed by the Donohoe group. <strong>Chapter 2. Results and Discussion</strong> 2.1 Studies towards the development of a palladium-catalysed, C–H activation-b

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14

Pulman, Jane. "A transcriptomics approach to understanding polymorphic and transcript level differences linked to isoquinoline alkaloid production in triploid varieties of Narcissus pseudonarcissus." Thesis, University of Liverpool, 2014. http://livrepository.liverpool.ac.uk/2006379/.

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The Amaryllidaceae have characteristic isoquinoline alkaloids including galanthamine that is approved for treatment of Alzheimer’s disease. The daffodil (Narcissus pseudonarcissus) is an industrial source of this alkaloid. This project undertook analysis of the daffodil transcriptome as an approach to understanding this alkaloid biosynthetic pathway. Material from the basal plate of var. Carlton was analysed using the Roche 454 GS FLX Titanium and Illumina HiSeq platforms to assemble reference transcripts (45324 transcripts from 454, 165065 from Illumina). Annotation was via a bespoke BLAST pi

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15

Erdelyi, Maria Carolina. "Contribuição à farmacognosia de Annona squamosa L. (Annonaceae) - Acompanhamento da variação sazonal de constituintes, aspectos botânicos e avaliação da atividade antileishmania in vitro." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/9/9138/tde-14092017-114936/.

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As doenças tropicais endêmicas representam um grave problema sócio-econômico, no Brasil e no mundo. A leishmaniose insere-se neste quadro. Considerando o surgimento da resistência dos parasitas e a séria toxicidade da terapêutica convencional, a busca de novas alternativas é urgente. A família Annonaceae tem mostrado ser rica fonte de compostos com atividade antiprotozoária. Neste contexto, Annona squamosa L. foi selecionada. Sendo mais conhecida como \"fruta-do-conde\", apresenta uso na medicinal popular, como: antihelmíntica e no combate aos ectoparasitas. Entre os principais metabólitos sec

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16

Sello, Thato Saoeni. "A novel method for the synthesis of Indolo[2,1-a]isoquinolines and modelling studies of 3-substituted oxindoles against PfPK5." Thesis, 2008. http://hdl.handle.net/10539/5598.

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Many naturally occurring and synthetically made azapolycyclic aromatic ring systems display important biological activities. One class of naturally occurring azapolycyclic aromatic ring systems is the dibenzopyrrocoline alkaloids, made from an indole nucleus fused to an isoquinoline system sharing the same nitrogen, i.e. the indolo[2,1-a]isoquinoline nucleus. The indolo[2,1-a]isoquinoline and its analogues have been reported to possess antileukemic, tubulin polymerization inhibitory and antitumor activity. A variety of indolo[2,1-a]isoquinolines have been synthesized in our labs. This

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17

Sonopo, Molahlehi Samuel. "Strategies for the synthesis of benzyltetrahydroisoquinoline alkaloids." Thesis, 2011. http://hdl.handle.net/10413/8080.

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The objectives of this project were to investigate the application of new methodologies for the preparation of benzyltetrahydroisoquinoline monomers and secondly, to synthesise the bisbenzyltetrahydroisoquinoline neferine and its analogues. Neferine was isolated from the roots of Nelumbo nucifera. This compound has been reported to exhibit important biological activities, which include anti-arrhymia, anti-platelet aggregation, anti-thrombosis, anti-cancer as well as anti-HIV activities. Moreover, neferine showed lower cytotoxicity compared to other isoquinolines. However, the total synthesis o

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18

Chen, Ya Chi, and 陳雅琪. "Stereoselective Studies on the Bioactive Isoquinoline Alkaloids on the Adrenergic Receptors." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/28391647144953101005.

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19

WU, YONG-CHANG, and 吳永昌. "Studies on the alkaloids of Formosan annonaceous plants and the biological activities of isoquinoline alkaloids and their N-oxides." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/42600543759827390169.

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20

Brusnahan, Jason Stewart. "Total synthesis of ancistrotanzanine A." Thesis, 2010. http://hdl.handle.net/2440/60142.

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This thesis describes the first total synthesis of ancistrotanzanine A, a member of the naphthylisoquinoline class of natural products. In Chapter 1 the synthetic challenges presented by the naphthylisoquinoline alkaloids are discussed and strategies that have been adopted in previous syntheses of naphthylisoquinoline alkaloids overviewed. Chapter 2 describes the preparation of the key 5,3'-biaryl linkage via the Pinhey-Barton reaction. Studies into forming the linkage atropselectively were investigated using chiral hydrobenzoin acetal auxiliaries. This was found to have limited success with a

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Brusnahan, Jason Stewart. "Total synthesis of ancistrotanzanine A." 2010. http://hdl.handle.net/2440/60142.

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This thesis describes the first total synthesis of ancistrotanzanine A, a member of the naphthylisoquinoline class of natural products. In Chapter 1 the synthetic challenges presented by the naphthylisoquinoline alkaloids are discussed and strategies that have been adopted in previous syntheses of naphthylisoquinoline alkaloids overviewed. Chapter 2 describes the preparation of the key 5,3'-biaryl linkage via the Pinhey-Barton reaction. Studies into forming the linkage atropselectively were investigated using chiral hydrobenzoin acetal auxiliaries. This was found to have limited success with a

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22

Hulcová, Daniela. "Biologická aktivita obsahových látek rostlin XXVII. Alkaloidy Fumaria officinalis L. a jejich účinek na acetylcholinesterasu a butyrylcholinesterasu." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-337392.

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Charles University in Prague Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Botany and Ecology Candidate: Daniela Hulcová Consultant: Prof. RNDr. Lubomír Opletal, CSc. Title of Diploma Thesis: Biological aktivity of plants metabolites. XXVII. Alkaloids of Fumaria officinalis L. and their effect on acetylcholinesterase and butyrylcholinesterase The summary ethanolic and diethylether extract were prepared from the herbs of a plant Fumaria officinalis L. We have obtained 201 fractions from this extract by column chromatography on the neutral Al2O3 (aluminium oxide). Joined fra

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23

"Cytotoxic effects of narciclasine." Thesis, 2007. http://library.cuhk.edu.hk/record=b6074516.

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It was found that narciclasine retarded the growth of human cancer cells and plant suspension cells in dose-dependent manner. The inhibitory mechanism of narciclasine was found to be apoptosis for the DNA histogram showed an apoptotic peak in narciclasine-treated A375 cancer cells. The fluorescent signal dUTP fluorescein was found in the narciclasine-treated A735 cancer cell in TUNEL assay. The Annexin-V-FLUOS stained A375 cancer cell at 24-hour treatment with no PI found. These results suggest that narciclasine triggered early apoptosis in A375 cancer cell. Immunoblot analysis of the apoptoti

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24

CAI, YAN-LI, and 蔡烟力. "Studieson the alkaloids of phoebe formosana hay. and dehaasia triandra merr,^^and the biological activities of isoquinoline alkaloids and their lst and 2nd Hofmann elimination products." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/55708841181254009570.

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蔡煙力. "Studies on the Alkaloids of Phoebe formosana Hay. and Dehaasia triandra Merr. and the Biological Activities of Isoquinoline Alkaloids and their 1st and 2nd Hofmann Elimination Products." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/82249291062561365020.

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26

Yi-Chen, Chia, and 賈宜琛. "Studies on the Chemical Constituents of Fissistigma oldhamii and F. balansae and the Antiplatelet Aggregation Activities of Isoquinoline Alkaloids." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/07101816435919972735.

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博士<br>高雄醫學大學<br>藥學研究所<br>88<br>As a series of studies on the chemical constituents and biological activities of Formosan Annonaceous plants, the methanolic extracts of stems and unripe fruits of Fissistigma oldhamii (Hemsl.) Merr., and ethanolic extracts of twigs of Fissistigma balansae (A. DC.) Merr. were investigated, respectively. Forty-three compounds including twenty-eight alkaloids [liriodenine (1), oxoxylopine (2), oxocrebanine (3), oxoisocalycinine (5), O-methylmoschatoline (6), noraristolodione (7), (-)-anonaine (10), (-)-xylopine (11), (-)-dicentrine (12), (-)-crebanine (13), (-)-O-

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27

Lee, Ying-Hong, and 李英宏. "Part I：Studies of Electroorganic Reactions toward the Syntheses of Isoquinoline AlkaloidsPart II：Application of Radical Cyclization Reactions toward the Syntheses of Alkaloids." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/33021001487032089617.

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碩士<br>國立中山大學<br>化學系研究所<br>89<br>PartⅠ：Studies of Electroorganic Reactions toward the Syntheses of Isoquinoline Alkaloids, and its possible mechanism. Part Ⅱ: Application of Radical Cyclization Reactions toward the Syntheses of Alkaloids, and other derivatives.

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Chen, Ke Shao, and 陳克紹. "Studies on the bioactive constituents of formosan plants-neolitsea parvigemma, neolitsea konishii, illigera luzonensis and argemone mexicana and the cardiovascular activities of isoquinoline alkaloids." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/09879987901074792325.

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29

Tao, Ying-Shin, and 陶應興. "Part I: Application of Electrooxidation Reaction Toward the Synthesis of Atropine Alkaloids.PartII: Application of Electroreduction Reaction Toward the Synthesis of Carboline and Isoquinoline Alkaloids." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/63218305303355166158.

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碩士<br>國立中山大學<br>化學系研究所<br>90<br>Part1: Application of electrooxidation reaction toward the synthesis of atropine allcaloids and synthesis of cocaine alkaloids. Part2: Application of electroreduction reaction toward the synthesis of yohimbine alkaloids.

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Malý, Lukáš. "Studium biologické aktivity alkaloidů izolovaných z Fumaria officinalis L. (Fumariaceae) II." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-334379.

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Malý, L.: Study of biological activity of alkaloids isolated from Fumaria officinalis L. (Fumariaceae) II. Diploma Thesis, Charles University in Prague, Faculty of Pharmacy in Hradec Králové, Department of Pharmaceutical Botany and Ecology, Hradec Králové 2014, 49 pp. Obtained diethylether extract of Fumaria officinalis L. was separated to fractions in column chromatography with petrol, chloroform and ethanol. Preparative TLC and crystalisation led to isolation of five alkaloids from fraction. Alkaloids were identified by GC-MS and NMR specters, optical rotation and melting point as protopine,

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Kostelník, Jan. "Studium biologické aktivity alkaloidů izolovaných z Fumaria officinalis L. (Fumariaceae) I." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-338727.

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Kostelník, J.: Study of biological activity of alkaloids isolated from Fumaria officinalis L. (Fumariaceae) I. Diploma thesis, Charles University in Prague,Faculty of Pharmacy in Hradec Králové, Department of Pharmaceutical Botany and Ecology, Hradec Králové 2014, 63 p. The aim of this study was to isolate alkaloids from joined fraction no. 55-67 (A2) obtained from the total alkaloid fraction of extract of Fumaria officinalis L. (Fumariaceae) plant. Using chromatography methods three alkaloids were isolated and then identified by structural analysis (GC-MS, NMR). Three alkaloids were isolated

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Makelane, Hlamulo Reply. "Regioselectivity of palladium-catalyzed sonogashira cross-coupling of 2-aryl-4-chloro-3-iodoquinoline- derivatives with terminal alkynes." Diss., 2010. http://hdl.handle.net/10500/3838.

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Please note that the structures do not display correctly in the pdf document. Therefore the original manuscript in MSWord has also been uploaded. Please contact us email if you cannot view these files.<br>Sonogashira cross-coupling of 2-aryl-4-chloro-3-iodoquinoline derivatives with stoichiometric amount of terminal alkynes in the presence of bis(triphenylphosphine)palladium(II)chloride and copper iodide in triethylamine afforded the 3-(alkynyl)-2-aryl-4-chloroquinoline, exclusively. On the other hand, the 2-aryl-4-chloro-3-iodoquinolines with excess (2.5 equiv.) of terminal alkynes in the pre

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Michal, Vojtěch. "Studium biologické aktivity alkaloidů izolovaných z Argemone grandiflora (Papaveraceae)II." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-379194.

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Michal, Vojtěch: STUDY OF BIOLOGICAL ACTIVITY OF ISOLATED ALKALOIDS FROM ARGEMONE GRANDIFLORA (PAPAVERACEAE) II. Diploma thesis 2015. Charles University in Prague, Faculty of Pharmacy in Hradec Králové, Department of Pharmaceutical Botany and Ecology. Supervisor: PharmDr. Jakub Chlebek, PhD. Key words: Argemone grandiflora Sweet, Papaveraceae, alkaloids, isolation, acetylcholinesterase, butyrylcholinesterase, prolyloligopeptidase, Alzheimerʼs disease, in vitro assay. Diethylether alkaloid extract obtained from stem and roots of Argemone grandiflora Sweet was chromatografically analyzed. Using

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Adamcová, Markéta. "Studium biologické aktivity alkaloidů izolovaných z Argemone grandiflora (Papaveraceae)I." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-331749.

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Adamcová, M.: Study of biological activity of alkaloids isolated from Argemone grandiflora (Papaveraceae) I. Diploma thesis, Charles University in Prague, Faculty of Pharmacy in Hradec Králové, Department of Pharmaceutical Botany and Ecology, Hradec Králové 2015. The aim of this study was isolation of substances from total diethyl ether alkaloid extract of Argemone grandiflora Sweet, their identification and assessment of their inhibition activity towards acetylcholinesterase, butyrylcholinesterase and prolyl oligopeptidase. Using common chromatografic methods, four alkaloids were isolated, th

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Ming, Feng Sheu, and 許明豐. "I:Synthesis of Carboline Alkaloids II:Synthetic Study of Isoquinolines with Antiplatelet Effect." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/58209559766435352755.

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hui, Hung chien, and 洪千惠. "The Efficacy of Isoquinoline Alkaloid in the Inhibition ofGP7TB Tumor Growth in Rats." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/55044380781750279352.

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碩士<br>國立中興大學<br>獸醫學系<br>93<br>The treatments of hepatoma differ according to patients’ conditions, and the success of chemotherapy is partially decided by the effects of the drug used for affecting the signal transductions of tumor cells. In this study, we estimated the effects of the treatment of hepatoma by berberine, an isoquinoline alkaloid. Nuclear Factor-kappa B（NF-κB）, one of the transcription factors controls cell-mediated immune response, sometimes overexpresses in tumor cells or around tissues. According to previous researches, it’s known that berberine is capable of restraining the

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Jih-Chao, Hong, and 洪日昭. "Part I：Electroorganic Syntheses of Carbolines and Isoquinolines. Part II：Application of Radical Cyclization to Synthesize Alkaloids." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/40879428899405937816.

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Cui, Jianwen. "Progress towards enantioselective total synthesis of the bisbenzyltetrahydroisoquinoline alkaloid (-)- cycleanine and a new approach to the syntheses of some isoquinolones /." 2003.

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