Results 191 to 200 of about 16,008 (266)

Rh(I)-Catalyzed C6-Selective Decarbonylative Alkylation of 2-Pyridones with Alkyl Carboxylic Acids and Anhydrides.

Organic Letters, 2020
A Rh-catalyzed chelation-assisted C6-selective C-H activation/alkylation of 2-pyridones with readily available alkyl carboxylic acids or anhydrides is introduced. The reaction proceeds via substrate decarbonylation.
Haoqiang Zhao, Xin Xu, Haiyang Yu, Bohan Li, Xingyu Xu, Huanrong Li, Lijin Xu, Q. Fan, P. Walsh   +8 more
semanticscholar   +1 more source

Tetrachlorobis(2-pyridone)-bis(μ2-2-pyridone)-dicopper

Acta Crystallographica Section C Crystal Structure Communications, 1993
In this structure two Cu II centres 3.4448 (11) A apart are bridged asymmetrically by two 2-pyridone ligands and each is further coordinated by three terminal ligands (two chlorides and one 2-pyridone). Each molecule has an approximate, non-crystallographic centre of symmetry.
R. E. P. Winpenny, A. J. Blake
openaire   +2 more sources

ChemInform Abstract: Synthesis of Pyridines and Pyridones.

Chemischer Informationsdienst, 1984
AbstractDie Synthese einiger Furobenzopyranone, Pyridine und Pyridone auf Basis der Naturstoffe Visnagin und Khellin wird beschrieben.
Madiha M. Y. Zohair, O. H. Hishmat, Jehane A. A. Micky   +2 more
openaire   +2 more sources

Synthesis of Functionalized Arylacetamido-2-pyridones through ortho-C(sp2)-H-Activated Installation of Olefins and Alkynes.

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, Sk Ajarul, M. Kundu, D. Tayde, U. Khamrai, D. Maiti   +5 more
semanticscholar   +1 more source

Photocatalyst-Free Singlet Oxygen-Induced Oxygenation: A Strategy for the Preparation of 5-Cyano-2-Pyridones Driven by Blue-Light Irradiation.

Journal of Organic Chemistry, 2020
A mild, catalyst- and metal-free photochemical protocol for the oxygenation of 3-cyano-1,4-dihydropyridines to 5-cyano-2-pyridones was developed. Utilizing molecular oxygen from air as the oxidant and a cheap blue LED lamp as the light source, a variety ...
Mengmeng Zhang, Hanyang Lan, Nan Li, Qidi Zhong, Hao Zhu, Chunyan Liu, Hongwu Zhao   +6 more
semanticscholar   +1 more source

Pyridone photoelectrocyclizations to pyridophenanthrenes

Tetrahedron, 2017
Abstract 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
openaire   +2 more sources

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, A. M. Gofman, N. P. Shusherina   +2 more
openaire   +1 more source

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, Peter Gund, Eugene M. Fluder   +2 more
openaire   +2 more sources

Ring lithiation of pyridones

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
openaire   +3 more sources

Photochemical Reactivity of Pyridones

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
openaire   +2 more sources