Results 281 to 290 of about 210,328 (345)
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meta-Selective C-H Functionalization of Pyridines.
Angewandte Chemie, 2023The pyridine moiety is an important core structure for a variety of drugs, agrochemicals, catalysts, and functional materials. Direct functionalization of C-H bonds in pyridines is a straightforward approach to access valuable substituted pyridines ...
Hui Cao, Q. Cheng, A. Studer
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Asymmetric C3-Allylation of Pyridines.
Journal of the American Chemical Society, 2023Asymmetric intermolecular C-H functionalization of pyridines at C3 is unprecedented. Herein, we report the first examples of such transformations: specifically, C3-allylation of pyridines via tandem borane and iridium catalysis.
Zhong Liu +6 more
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Radical and ionic meta-C–H functionalization of pyridines, quinolines, and isoquinolines
Science, 2022Carbon-hydrogen (C−H) functionalization of pyridines is a powerful tool for the rapid construction and derivatization of many agrochemicals, pharmaceuticals, and materials.
Hui Cao, Q. Cheng, A. Studer
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Borane-Catalyzed C3-Alkylation of Pyridines with Imines, Aldehydes, or Ketones as Electrophiles.
Journal of the American Chemical Society, 2022Achieving C3-selective pyridine functionalization is a longstanding challenge in organic chemistry. The existing methods, including electrophilic aromatic substitution and C-H activation, often require harsh reaction conditions and excess pyridine and ...
Zhong Liu +7 more
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Journal of the American Chemical Society, 2022
Herein, we report a method for unprecedented C3-selective C-H tri- and difluoromethylthiolation of pyridines. The method relies on borane-catalyzed pyridine hydroboration for generation of nucleophilic dihydropyridines; these intermediates react with ...
Xin-Yue Zhou +4 more
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Herein, we report a method for unprecedented C3-selective C-H tri- and difluoromethylthiolation of pyridines. The method relies on borane-catalyzed pyridine hydroboration for generation of nucleophilic dihydropyridines; these intermediates react with ...
Xin-Yue Zhou +4 more
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Angewandte Chemie, 2020
A general strategy for visible-light-enabled site-selective trifluoromethylative pyridylation of unactivated alkenes has been developed using pyridines and triflic anhydride (Tf 2 O).
Kangjae Lee +4 more
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A general strategy for visible-light-enabled site-selective trifluoromethylative pyridylation of unactivated alkenes has been developed using pyridines and triflic anhydride (Tf 2 O).
Kangjae Lee +4 more
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Role of Pyridine in Wyodak−Pyridine Adducts
Energy & Fuels, 2005When pyridine (PYR) is added to powdered Wyodak subbituminous coal (WYO), the sample is converted to a paste, and the molecular-level adduct which is formed is stable for months. After the excess pyridine has evaporated from the WYO−PYR sample, the stoichiometry of the adduct is ca.
Wertz, David L. +3 more
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Synlett : Accounts and Rapid Communications in Synthetic Organic Chemistry, 2020
Pyridine is an important structural motif that is prevalent in natural products, drugs, and materials. Methods that functionalize and derivatize pyridines have gained significant attention. Recently, a large number of transition-metal-free reactions have
Fei Zhou, Lei Jiao
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Pyridine is an important structural motif that is prevalent in natural products, drugs, and materials. Methods that functionalize and derivatize pyridines have gained significant attention. Recently, a large number of transition-metal-free reactions have
Fei Zhou, Lei Jiao
semanticscholar +1 more source
ChemPhysChem, 2012
AbstractA study of crystal structures from the Cambridge Structural Database (CSD) and DFT calculations reveals that parallel pyridine–pyridine and benzene–pyridine interactions at large horizontal displacements (offsets) can be important, similar to parallel benzene–benzene interactions.
Snežana D. Zarić +3 more
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AbstractA study of crystal structures from the Cambridge Structural Database (CSD) and DFT calculations reveals that parallel pyridine–pyridine and benzene–pyridine interactions at large horizontal displacements (offsets) can be important, similar to parallel benzene–benzene interactions.
Snežana D. Zarić +3 more
openaire +4 more sources
Journal of the American Chemical Society, 2019
Annulated pyridines are ubiquitous scaffolds in many bioactive molecules. A highly regio- and enantioselective Ni(0)-catalyzed endo-selective C-H cyclization of pyridines with alkenes has been developed.
Wu-Bin Zhang +4 more
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Annulated pyridines are ubiquitous scaffolds in many bioactive molecules. A highly regio- and enantioselective Ni(0)-catalyzed endo-selective C-H cyclization of pyridines with alkenes has been developed.
Wu-Bin Zhang +4 more
semanticscholar +1 more source