Showing 61 - 80 results of 11,268 for search '"alkaloid"', query time: 0.22s Refine Results
  1. 61

    4-KETOSTEROIDAL SOLANUM ALKALOIDS by Usubillaga Alfredo

    Published 2021-05-01
    “…4-keto steroidal alkaloids are C-27 substances that have a C-4 carbonyl on their steroidal frame, which makes them different from other steroidal alkaloids. …”
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    Article
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    Synthesis of piperidine and quinolizidine alkaloids by Nur Filza Mohamed Aslam

    Published 2017
    “…In the following chapter, we sought to employ isoxazolidines to the synthesis of (+)-vertine, a macrocyclic quinolizidine alkaloid which was reported to possess antimalarial activity. …”
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    Thesis
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    Alkaloids from transannular iodoaminations by Brock, E

    Published 2012
    “…<p>This thesis is concerned with the development of transannular iodoamination methodology for the synthesis of pyrrolizidine, indolizidine and tropane alkaloids.</p> <p><strong>Chapter 1</strong> introduces the concept of a ‘transannular cyclisation’ and outlines the utility of such cyclisations in the synthesis of a range of [x.y.z]-azabicyclic alkaloids.…”
    Thesis
  8. 68

    Asymmetric synthesis of the tetraponerine alkaloids by Davies, S, Fletcher, A, Houlsby, I, Roberts, P, Thomson, J

    Published 2017
    “…The asymmetric syntheses of all eight tetraponerine alkaloids (T1–T8) were achieved using the diastereoselective conjugate additions of lithium amide reagents in the key stereodefining steps. …”
    Journal article
  9. 69

    Total syntheses of the nakinadine alkaloids by Shah, R

    Published 2013
    “…<p>This thesis is concerned with the development of methodology for the asymmetric syntheses of the nakinadine family of marine alkaloids and through these synthetic endeavours, seeks to confirm the structure and assign the relative and absolute configurations of these alkaloids for the first time.…”
    Thesis
  10. 70

    Asymmetric synthesis of the loline alkaloids by Linsdall, SM

    Published 2019
    “…This synthetic route was used to prepare an advanced intermediate for the synthesis of the tricyclic loline alkaloid scaffold, from which four loline alkaloids were derived.…”
    Thesis
  11. 71

    Asymmetric syntheses of the pseudodistomin alkaloids by Zimmer, D

    Published 2018
    “…<p>This thesis centres on asymmetric syntheses of the pseudodistomin alkaloids, initially targeting a member of the family that had yet to be subjected to laboratory synthesis, followed by the development and execution of a unified strategy for the synthesis of all of the known pseudodistomin alkaloids as well as non-natural analogues.…”
    Thesis
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    Asymmetric synthesis of piperidine alkaloids by Thomson, A, Anthony Thomson

    Published 2012
    “…This thesis describes investigations into the total asymmetric synthesis of alkaloids from polysubstituted piperidines via iodolactonisation, resulting in the completion of an asymmetric synthesis of pseudodistomin D.…”
    Thesis
  14. 74

    Alkaloidal constituents of Tinospora crispa by Choudhary, M. Iqbal, Ismail, Muhammad, Ali, Zulfiqar, Shaari, Khozirah, Lajis, Md. Nordin, Atta-ur-Rahman

    Published 2010
    “…Phytochemical investigations of the stems of Tinospora crispa led to the isolation of one new aporphine alkaloid, N-formylasimilobine 2-O-beta-D-glucopyranoside (1), along with six known alkaloids, N-formylasimilobine 2-O-beta-D-glucopyranosyl-(1 --> 2)-beta-D-glucopyranoside (2) (tinoscorside A), N-formylanonaine (3), N-formyldehydroanonaine (4), N-formylnomuciferine (5), N-demethyl-N-formyldehydronornuciferine (6), magnoflorine (7), paprazine (8), N-trans-feruloyltyramine (9), and cytidine (10). …”
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    Article
  15. 75

    Plant toxins: alkaloids and their toxicities by Mohamad Azzeme, Azzreena, Kamarul Zaman, Munirah Adibah

    Published 2019
    “…Since ancient civilization, plants have been utilized in many aspects of life, especially in medicinal purposes due to the presence of distinctive secondary metabolites like alkaloids, phenolics and terpenoids. Among them, alkaloids represent a large group of secondary metabolites that have basic properties and comprise nitrogen atom within the heterocyclic ring. …”
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    Article
  16. 76

    Visual identification of alkaloids in some medicinal plants: common alkaloid reagents versus bromocresol green by Shamsa F, Esfahani HR, Gamooshi RA

    Published 2008-07-01
    Subjects: “…Medicinal plants, alkaloids, visual identification, ion pair formation, bromocresol green…”
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    Article
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    Angustilobine and andranginine type indole alkaloids and an uleine–secovallesamine bisindole alkaloid from Alstonia angustiloba by Kam, T.S., Ku, W.F., Tan, S.J., Low, Y.Y., Komiyama, K.

    Published 2011
    “…A total of 20 alkaloids were isolated from the leaf and stem-bark extracts of Alstonia angustiloba, of which two are hitherto unknown. …”
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    Article
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