Results 41 to 50 of about 358,569 (255)
N-Heterocyclic carbene-catalyzed deaminative cross-coupling of aldehydes with Katritzky pyridinium salts. [PDF]
Chem Sci, 2020 By employing an N-heterocyclic carbene (NHC) catalyst, we developed a versatile catalytic system that enables deaminative cross-coupling reactions of aldehydes with redox-active pyridinium salts.
Kim I, Im H, Lee H, Hong S.
europepmc +2 more sources
On the photochemical reaction of pyridinium salts with nucleophiles [PDF]
Photochemical & Photobiological Sciences, 2021 AbstractDFT calculations on the photochemical reaction of 1-n–N-butylpyridinium salt in water with hydroxide anion is in agreement with a singlet state process where the S2 state at λ = 253 nm can be converted into a Dewar isomer (2-butyl-2-azabicyclo[2.2.0]hexa-2,5-dien-2-yl cation).
openaire +4 more sources
Passivating Lead Halide Perovskites Using Pyridinium Salts with Superhalogen Atoms
, 2022 Passivating lead halide perovskites using pyridinium salts has attracted enormous attention, but the excellent surface passivation of the halide perovskites has not been achieved by using only a pyridinium salt until now.
Dongjie Zhu (8897999) +3 more
core +2 more sources
Catalytic Photochemical Enantioselective α-Alkylation with Pyridinium Salts
, 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
core +1 more source
Frontiers in Chemistry, 2022 Graphical AbstractA novel series of 3-phenyl-coumarin derivatives containing pyridinium salts was prepared, indicating significant inhibitory activity against AChE and BuChE as well as precious neuroprotective and anti-Aβ aggregation effects.
Elaheh Babaei +14 more
doaj +1 more source
Harnessing Alkylpyridinium Salts as Electrophiles in Deaminative Alkyl-Alkyl Cross-Couplings. [PDF]
J Am Chem Soc, 2019 A Negishi cross-coupling of alkyl pyridinium salts and alkylzinc halides has been developed. This is the first example of alkyl–alkyl bond formation via cross-coupling of an alkyl amine derivative with an unactivated alkyl group, and allows both primary ...
Plunkett S +3 more
europepmc +2 more sources
Organic Letters, 2021 Synthetically versatile alkyl sulfinates can be prepared from readily available amines, using Katritzky pyridinium salt intermediates. In a catalyst-free procedure, primary, secondary, and benzylic alkyl radicals are generated by photoinduced or ...
Jonathan A. Andrews +4 more
semanticscholar +1 more source
Investigation of the Pyridinium Ylide—Alkyne Cycloaddition as a Fluorogenic Coupling Reaction
Molecules, 2016 The cycloaddition of pyridinium ylides with alkynes was investigated under mild conditions. A series of 13 pyridinium salts was prepared by alkylation of 4-substituted pyridines.
Simon Bonte +4 more
doaj +1 more source
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
core +1 more source
4,4′,4″-(Benzene-1,3,5-triyltris(ethyne-2,1-diyl))tris(1-methylpyridin-1-ium) Iodide
Molbank, 2023 Despite having been known for a long time, quaternary 4,4′-bipyridinium salts, or viologens, are still a highly inspiring class of compounds, thanks to their peculiar redox and charge transfer properties.
Lorenza Romagnoli +2 more
doaj +1 more source