Results 231 to 240 of about 16,216 (275)
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Organic Letters, 2019
Tosylhydrazones under palladium catalysis were found to perform cross-coupling reactions with 4-hydroxy-2-pyridones. The umpolung-like reactivity, between the α-carbon of tosylhydrazone and the 3-position of the heterocycle, which is observed in the ...
Tania Katsina +2 more
semanticscholar +1 more source
Tosylhydrazones under palladium catalysis were found to perform cross-coupling reactions with 4-hydroxy-2-pyridones. The umpolung-like reactivity, between the α-carbon of tosylhydrazone and the 3-position of the heterocycle, which is observed in the ...
Tania Katsina +2 more
semanticscholar +1 more source
Journal of Organic Chemistry, 2017
A rhodium catalyzed direct regioselective oxidative annulation by double C-H activation is described to synthesize highly substituted quinolones from pyridones. The reaction proceeds at mild conditions with broad scope and wide functional group tolerance.
Aniruddha Biswas +5 more
semanticscholar +1 more source
A rhodium catalyzed direct regioselective oxidative annulation by double C-H activation is described to synthesize highly substituted quinolones from pyridones. The reaction proceeds at mild conditions with broad scope and wide functional group tolerance.
Aniruddha Biswas +5 more
semanticscholar +1 more source
Phototoxicity and photogenotoxicity of nine pyridone derivatives
Mutation Research/Genetic Toxicology and Environmental Mutagenesis, 2003Nine structurally related pyridone derivatives were assayed for photogenotoxicity and phototoxicity in the Ames test, the chromosomal aberration test in V79 cells and the neutral red uptake (NRU) test in 3T3 cells. All nine compounds absorb light to a comparable degree at wavelengths between 380 and 430 nm.
Stephan Kirchner +8 more
openaire +3 more sources
Organic Letters, 2016
In this study we developed a method for the pyridine-directed, rhodium-catalyzed, site-selective C-H alkylation and arylation of pyridones using commercially available trifluoroborate reagents.
Panfeng Peng +3 more
semanticscholar +1 more source
In this study we developed a method for the pyridine-directed, rhodium-catalyzed, site-selective C-H alkylation and arylation of pyridones using commercially available trifluoroborate reagents.
Panfeng Peng +3 more
semanticscholar +1 more source
Photoreactions of alkylated 2-pyridones
Journal of the Chemical Society, Perkin Transactions 2, 1985Photoisomerisation and dimerisation reactions in solution have been studied with a series of alkylated 2- pyridones (1). The low quantum efficiencies for the photoisomerisation (0.01–0.07) are related to the short-lived singlet excited states (below 1 ns). The effects of temperature, solvent, and substrate concentration were also examined.
Ryoka Matsushima, Kazuhide Terada
openaire +2 more sources
Rhodium-Catalyzed C6-Selective C-H Borylation of 2-Pyridones.
Organic Letters, 2016A pyridine-directed, rhodium-catalyzed C6-selective C-H borylation of 2-pyridones with bis(pinacolato)diboron (pinB-Bpin) has been developed. The reaction proceeds smoothly under relatively mild conditions, and the corresponding C6-borylated 2-pyridones ...
W. Miura, K. Hirano, M. Miura
semanticscholar +1 more source
Journal of Organic Chemistry, 2017
A pyridine-directed, C6-selective nickel-catalyzed ring-contracting C-H alkylation of 2-pyridones with 1,5-cyclooctadiene (cod) has been developed. The reaction proceeds smoothly under external-ligand-free conditions and is accelerated uniquely by a ...
W. Miura, K. Hirano, M. Miura
semanticscholar +1 more source
A pyridine-directed, C6-selective nickel-catalyzed ring-contracting C-H alkylation of 2-pyridones with 1,5-cyclooctadiene (cod) has been developed. The reaction proceeds smoothly under external-ligand-free conditions and is accelerated uniquely by a ...
W. Miura, K. Hirano, M. Miura
semanticscholar +1 more source
Journal of Molecular Structure: THEOCHEM, 1992
Abstract Three dimers created from the 2-pyridone/2-hydroxypyridine tautomers and four dimers created by the 4-pyridone/4-hydroxypyridine tautomers were described using ab initio self-consistent-field (SCF) calculation and the energies were corrected for the electron correlation contribution by using the second-order Moller-Plesset (MP2) perturbation
Andrzej Leś +2 more
openaire +2 more sources
Abstract Three dimers created from the 2-pyridone/2-hydroxypyridine tautomers and four dimers created by the 4-pyridone/4-hydroxypyridine tautomers were described using ab initio self-consistent-field (SCF) calculation and the energies were corrected for the electron correlation contribution by using the second-order Moller-Plesset (MP2) perturbation
Andrzej Leś +2 more
openaire +2 more sources
ChemInform Abstract: Synthetic Entries to Substituted Bicyclic Pyridones.
ChemInform, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Cheng, DC +4 more
openaire +5 more sources
, 2016
A facile regioselective metal-free direct α-arylation of coumarins and 2-pyridones is achieved by the reaction of coumarins and 2-pyridones with phenylhydrazine in good yields.
P. Chauhan +4 more
semanticscholar +1 more source
A facile regioselective metal-free direct α-arylation of coumarins and 2-pyridones is achieved by the reaction of coumarins and 2-pyridones with phenylhydrazine in good yields.
P. Chauhan +4 more
semanticscholar +1 more source