Results 31 to 40 of about 5,326,384 (292)
, 2023 The current project aims to apply the virtues of minimalism to examine the catalytic ability of commercially organic compounds of small chemical structures to catalyze the coupling reaction between carbon dioxide and propylene oxide (PO) under mild ...
Ibtesam M. Desoky +7 more
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Catalytic reactions of pyridinium and iminium ions
, 2022 Watson, Mary P.The dissertation focuses on transition metal catalysis of cationic species to make C-C bonds. ☐ Chapter 1 describes a nickel-catalyzed Suzuki-Miyaura cross-coupling of benzylic pyridinium salts. The pyridinium salts act as electrophiles in
Guan, Weiye
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Catalytic Photochemical Enantioselective α-Alkylation with Pyridinium Salts [PDF]
, 2022 We have developed a chiral amine catalyzed enantioselective α-alkylation of aldehydes with amino acid derived pyridinium salts as alkylating reagents. The reaction proceeds in the presence of visible light (390 nm) and in the absence of a photocatalyst ...
Santhivardhana Reddy, Yetra +2 more
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Acta Crystallographica Section E: Crystallographic Communications, 2022 Three isomorphous 0-D hybrid salts, namely, 2-methylimidazo[1,5-a]pyridinium trichloridoiodidozincate(II), (C8H9N2)2[ZnCl3.19I0.81] or [L]2[ZnCl3.19I0.81], (I), 2-methylimidazo[1,5-a]pyridinium dibromidodichloridocadmate(II), (C8H9N2)2[CdBr2.42Cl1.58] or
Olga Yu. Vassilyeva +3 more
doaj +1 more source
Chemistry Central Journal, 2018 Background Pyridinium Schiff bases and ionic liquids have attracted increasing interest in medicinal chemistry. Results A library of 32 cationic fluorinated pyridinium hydrazone-based amphiphiles tethering fluorinated counteranions was synthesized by ...
Fawzia Faleh Al-Blewi +6 more
doaj +1 more source
Design and synthesis of novel bis-pyridinium based-ionic liquids as potent antiparasitic agents
Heliyon, 2023 Focused bis-pyridinium based-ionic liquids were successfully synthesized through the quaternization of the selected 1,2-di(pyridin-4-yl)ethane followed by metathetical anion exchange.
Esraa Abdelhamid Moneer +9 more
doaj +1 more source
Antimicrobial activities of pyridinium-tailored pyrazoles bearing 1,3,4-oxadiazole scaffolds
Journal of Saudi Chemical Society, 2017 Herein, a series of pyridinium-tailored 5-trifluoromethylpyrazoles containing 1,3,4-oxadiazole moieties were constructed through coupling key pharmaceutical fragments of pyridinium, pyrazole, and 1,3,4-oxadiazole scaffolds in single molecular ...
Lei Zhou +6 more
doaj +1 more source
A method for the nucleophilic fluorination of 4-dimethylaminopyridine (DMAP) pyridinium salts
Results in Chemistry, 2023 Fluorinated organic compounds have proven to be beneficial in various industries. Recent research has utilized quaternary ammonium salts as precursors for fluorinations using the radioactive isotope 18F.
Derek Cressy +4 more
doaj +1 more source
Reaction of Pyridinium Salts with Active Methylene Compounds
YAKUGAKU ZASSHI, 2006 The carbon-carbon bond-forming reactions of 1-methyl-2-methylthiophenylpyridinium iodides with active methylene compounds (such as dimethyl malonate, malononitrile) using NaH as a base gave the 2-substituted methylene-1,2-dihydropyridine derivatives.
Reiko, Fujita +3 more
openaire +3 more sources
Electron Donor–Acceptor Complex Catalysis in Synthetic Chemistry
Angewandte Chemie, EarlyView.Electron donor–acceptor (EDA) complexes are moving beyond stoichiometric photoactivation toward catalytic platforms for radical generation. Productive EDA catalysis requires coordinated donor–acceptor association, charge‐transfer excitation, radical reactivity, and vcatalyst turnover.
Tristan von Münchow +3 more
wiley +2 more sources