Results 251 to 260 of about 20,092 (323)
Chlorosulfonation of 2-pyridones [PDF]
Chemistry of Heterocyclic Compounds, 1974 Chlorosulfonlyl-substituted 2-pyridones were obtained for the first time. The ability of 2-pyridone-3-sulfonyl chlorides to undergo conversion to sulfonylides of the pyridine series by the action of bases is shown in the case of 5,6,7,8-tetrahydro-2-quinolone-3-sulfonyl chloride.
T. I. Likhomanova +2 more
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Pyridone photoelectrocyclizations to pyridophenanthrenes
Tetrahedron, 2017Abstract This article describes the synthesis of pyridophenanthrenes from the stereoselective electrocyclization and [1,5]-hydride shift sequences of biphenyl pyridones. The regioselectivity of the reaction of meta-substituted biphenyl substrates depended on the electronic environment of the substituents.
Jon D. Rainier, Xuchen Zhao
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Journal of Organic Chemistry, 2020
We have identified different N-substituted 2-pyridones as inbuilt directing groups for selective C-H-activated functionalization instead of deprotecting and/or throwing away the directing groups.
Tanmay K. Pati +5 more
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We have identified different N-substituted 2-pyridones as inbuilt directing groups for selective C-H-activated functionalization instead of deprotecting and/or throwing away the directing groups.
Tanmay K. Pati +5 more
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ChemInform Abstract: TAUTOMERIZATION OF FORMAMIDE, 2‐PYRIDONE, AND 4‐PYRIDONE: AN AB INITIO STUDY [PDF]
Chemischer Informationsdienst, 1982 The tautomerism of formamide, 2-pyridone, and 4-pyridone has been investigated by ab initio calculations using minimal, extended, and polarization basis sets. When the effects of geometry optimization, polarization functions, correlation energy (estimated by second-order Merller-Plesset perturbation theory), and zero-point vibration energy are combined,
H. Bernhard Schlegel +2 more
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Journal of the Chemical Society, Perkin Transactions 1, 1988
AbstractTreatment of (I) with BuLi results in lithiation of the methyl group and formation of the dimer (II); 6‐lithiation represents a minor pathway (15% (III) is obtained on quenching with D2O).
Premji Meghani, John A. Joule
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AbstractTreatment of (I) with BuLi results in lithiation of the methyl group and formation of the dimer (II); 6‐lithiation represents a minor pathway (15% (III) is obtained on quenching with D2O).
Premji Meghani, John A. Joule
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Photochemical Reactivity of Pyridones
ChemInform, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
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Ambident Reactivities of Pyridone Anions
Journal of the American Chemical Society, 2010The kinetics of the reactions of the ambident 2- and 4-pyridone anions with benzhydrylium ions (diarylcarbenium ions) and structurally related Michael acceptors have been studied in DMSO, CH(3)CN, and water. No significant changes of the rate constants were found when the counterion was varied (Li(+), K(+), NBu(4)(+)) or the solvent was changed from ...
Herbert Mayr, Martin Breugst
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Organic Letters, 2019
O-(ω-Alkynyl) hydroxamates derived from cyclobutenyl carboxylic acids were identified as viable substrates in intramolecular rhodium(III)-catalyzed heteroannulations, which led to diversely substituted cyclobuta[c]pyridones.
Tomas J. Saiegh +3 more
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O-(ω-Alkynyl) hydroxamates derived from cyclobutenyl carboxylic acids were identified as viable substrates in intramolecular rhodium(III)-catalyzed heteroannulations, which led to diversely substituted cyclobuta[c]pyridones.
Tomas J. Saiegh +3 more
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Journal of the Chemical Society B: Physical Organic, 1968
The reaction between N-alkyl-2-pyridones and tetracyanoethylene produces 2 : 1 salts of the pyridone with pentacyanopropene. Metathetical exchange of these salts with 4H-quinolizin-4-one leads to mono- and bis-quinolizone salts. Similar salts are formed with hydroquinone in place of pentacyanopropene.
K. Rajagopalan +2 more
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The reaction between N-alkyl-2-pyridones and tetracyanoethylene produces 2 : 1 salts of the pyridone with pentacyanopropene. Metathetical exchange of these salts with 4H-quinolizin-4-one leads to mono- and bis-quinolizone salts. Similar salts are formed with hydroquinone in place of pentacyanopropene.
K. Rajagopalan +2 more
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Journal of Agricultural and Food Chemistry, 2018
Four new α-pyrones (1-4) and eight known analogues (5-12) were identified from the secondary metabolites of Streptomyces sp. OUCMDZ-3436 derived from the marine green algae Enteromorpha prolifera.
Yuqi Du +5 more
semanticscholar +1 more source
Four new α-pyrones (1-4) and eight known analogues (5-12) were identified from the secondary metabolites of Streptomyces sp. OUCMDZ-3436 derived from the marine green algae Enteromorpha prolifera.
Yuqi Du +5 more
semanticscholar +1 more source