Relevant bibliographies by topics / N-Heterocyclic iminium salts

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Academic literature on the topic 'N-Heterocyclic iminium salts'

Author: Grafiati
Published: 25 May 2024
Last updated: 31 July 2025

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Journal articles on the topic "N-Heterocyclic iminium salts"

1

Kantlehner, Willi, Erwin Haug, and Christophe Bauer. "Orthoamide und Iminiumsalze, LXXXI [1]. Orthoamid-Derivate der 1,3-Dimethylparabansäure / Orthoamides and Iminium Salts LXXXI [1]. Orthoamide Derivatives of 1,3-Dimethylparabanic Acid." Zeitschrift für Naturforschung B 67, no. 9 (2012): 907–12. http://dx.doi.org/10.5560/znb.2012-0123.

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1,3-Dimethyl-5-imino-imidazolidine-2,4-dione (7a) undergoes thiolysis (H2S) to give the corresponding imidazolidine-2,4-dione-5-thione derivative 6. The 5-N-methylimino analogue 7b can be obtained from 7a by methylation. Further methylation of 7b affords the crude iminium salt 8c from which the heterocyclic orthoamide derivatives 10, 11 can be prepared. The heterocyclic amide acetal 9a can be obtained from 7a and dimethyl sulfate in methanol and subsequent addition of sodium methanolate in a one-pot reaction. The aminal ester 10 is converted to the amide acetal 9a on treatment with hydrogen ch
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2

Kantlehner, Willi, and Konstantin Drandarov. "Orthoamides and Iminium Salts LXXVII. Cycloadditions to N,N,N′,N′,N′′,N′′,N′′′,N′′′-Octamethylacetylenedicarboxamidinium Bis(tetrafluoroborate): A New Synthetic Method for the Preparation of Heterocyclic Dicarboxamidinium Salts." Synthesis 44, no. 15 (2012): 2408–12. http://dx.doi.org/10.1055/s-0031-1290410.

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3

Kantlehner, Willi, Markus Vettel, and Bernhard Eppinger. "Orthoamide und Iminiumsalze, LXXVI [1]. Ein weiterer Beitrag zur Chemie der Trialkoxyacetonitrile/ Orthoamides and Iminium Salts LXXVI [1]. A Further Contribution to the Chemistry of Trialkoxyacetonitriles." Zeitschrift für Naturforschung B 67, no. 4 (2012): 373–88. http://dx.doi.org/10.1515/znb-2012-0412.

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An improved procedure for the preparation of trimethoxyacetonitrile (3a) starting from trichloroacetonitrile and sodium methanolate is described. Carbanions, obtained by the action of sodium hydride on nitriles, ethyl acetate and methylketones, react with trialkoxyacetonitriles 3 to give α- imino-orthocarboxylic acid trialkylesters 12, 14 and 20, which form an equilibrium with the tautomeric enamines 13, 15 and 21. The enamines 21 react with N,N-dimethylformamide dimethylacetal (24) to give amidines 25 which are cyclized to pyridinium salts 28 and 29 on treatment with benzyl bromide and acetyl
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4

T. Gupton, John, Scott A. Petrich, Fred A. Hicks, et al. "The Preparation of Heterocyclic Appended Vinylogous Iminium Salts and Their Application to the Regioselective Preparation of Biheterocyclic Systems." HETEROCYCLES 47, no. 2 (1998): 689. http://dx.doi.org/10.3987/com-97-s(n)21.

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5

Casanova, M. C., Y. Zhao, S. Hutter, et al. "N,N’-bridged heterocyclic bis-iminium salts as potent antimalarial agents against multi-resistant Plasmodium falciparum." European Journal of Medicinal Chemistry, April 2025, 117633. https://doi.org/10.1016/j.ejmech.2025.117633.

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6

Boisvert, Eliza-Jayne Y., Richard Ramos Castellanos, Michael J. Ferguson, and Deryn E. Fogg. "Abstraction of Trifluoroborane from Tetrafluoroborate: Li+‐Assisted Borylation of Nucleophilic Carbenes." ChemCatChem, June 21, 2024. http://dx.doi.org/10.1002/cctc.202401003.

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The small, lipophilic tetrafluoroborate anion is ubiquitous in the imidazol(in)ium and iminium precursors to N‐heterocyclic carbenes (NHCs), including cyclic (alkyl)(amino)carbenes (CAACs). The symmetrical distribution of charge over four highly electronegative fluorine atoms confers high stability, attenuating basicity while shielding the boron center. Here we report that this inertness does not withstand the nucleophilicity of free carbenes, when combined with a polarizing lithium cation. Reaction of CAAC•HBF4 salts with LiN(SiMe3)2, a protocol widely used to liberate free CAACs, generates z
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Dissertations / Theses on the topic "N-Heterocyclic iminium salts"

1

Casanova, Marion. "Conception et évaluation de vecteurs polymériques d'iminium N-hétérocyclique à activité antiplasmodiale." Electronic Thesis or Diss., Aix-Marseille, 2023. http://theses.univ-amu.fr.lama.univ-amu.fr/230324_CASANOVA_795kpzkf736jdsb801go615hzgclu_TH.pdf.

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La vectorisation de médicaments a mis en exergue de réelles innovations pharmacologiques et pharmacocinétiques. Néanmoins, peu d’études originales ont été menées sur les vecteurs à visée antiparasitaire. Seuls des médicaments pour lesquels les parasites ont développé des mécanismes de résistance, ont été utilisés en vectorisation. Les conditions et coûts de préparation de ces nanoformulations sont également un frein majeur à leur future production. L’enjeu consistait donc à développer des nanovecteurs permettant la délivrance de nouvelles classes d’antiparasitaires, tout en s’appuyant sur une
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