Results 31 to 40 of about 16,008 (266)
Angewandte Chemie, EarlyView.A two‐stage dication pool strategy using alkenyl thianthrenium intermediates has been developed for anti‐Markovnikov hydrofunctionalization. This method differs from previous approaches in its reaction mechanism and addresses their most significant limitation, namely, the restricted generality of the nucleophile. The approach has been extended to other
Bence Sóvári +7 more
wiley +2 more sources
Two New Antibiotic Pyridones Produced by a Marine Fungus, Trichoderma sp. Strain MF106
Marine Drugs, 2014 Two unusual pyridones, trichodin A (1) and trichodin B (2), together with the known compound, pyridoxatin (3), were extracted from mycelia and culture broth of the marine fungus, Trichoderma sp. strain MF106 isolated from the Greenland Seas.
Bin Wu +4 more
doaj +1 more source
CHIMIA, 2020 N-Heterocyclic carbenes (NHCs) are the ligands of choice in a large variety of transformations entailing different transition metals. However, the number and variety of chiral NHCs suitable as stereo-controlling ligands in asymmetric catalysis remains ...
Johannes Diesel, Nicolai Cramer
doaj +1 more source
SynOpen, 2021 An efficient method for the synthesis of highly substituted bicyclic pyridone derivatives containing the dithiocarbamate group is reported via a one-pot three-component reaction of 2-(alkylthio)thioazlactones, diamines, and nitroketene dithioacetal in ...
Marziyeh Saeedi +6 more
doaj +1 more source
Tautomerism of 4-Pyridones [PDF]
Bulletin of the Chemical Society of Japan, 1977 Abstract The tautomeric constants, Kt, of several 4-pyridones were determined by measurement of pKa values. For 2-substituted 5-methoxy-4-pyridones, the Kt values were correlated to the substituent constants σ, the equation logkt=2.98+2.93σm−6.18σo being obtained.
Hiromichi Besso +2 more
openaire +2 more sources
Angewandte Chemie, EarlyView.A highly enantioselective isoselenourea catalyzed route to fused pyrazolo‐pyridone and ‐pyranone heterocycles has been developed. Mechanistic and computational studies highlight the significance of an intermediate amide or ester product derived from 1,2‐addition that can be diverted to the desired pathway through isoselenourea acylation.
Martha I. Prindl +6 more
wiley +2 more sources
Die Acylierung von 4‐Pyridon [PDF]
Chemische Berichte, 1980 AbstractBei der Acylierung von 4‐Pyridon (1) mit aliphatischen Carbonsäure‐anhydriden und ‐chloriden oder freien Säuren in Gegenwart von Dicyclohexylcarbodiimid erhält man ausschließlich N‐Acyl‐4‐pyridone (5). Auch bei der Umsetzung von 1 mit ortho‐substituierten Benzoesäurederivaten sind nur N‐Acylierungsprodukte 8 isolierbar.
Effenberger, Franz +2 more
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Reverse Regioselective Dicarbofunctionalization via Anti‐Michael‐Type Addition
Angewandte Chemie, EarlyView.A reverse regioselective dicarbofunctionalization of acrylamides via anti‐Michael‐type addition is reported. Various (hetero)arene nucleophiles and carbon electrophiles were incorporated in a manner opposite to conventional regioselectivity. A key feature of this reaction is the formation of an alkylpalladium intermediate, which enables the achievement
Hirotsugu Suzuki +2 more
wiley +2 more sources
Synthesis of Some New Enaminoketones, Analogous of Milrinone, 4,Pyrones and Related 4-Pyridones [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 1996 Synthesis of 4-(N,N- dimethylamino)-3-aryl-3-butene-2-one, ethyl-5-aryl-4-oxo-4H-pyran-2-carboxylate, ethyl-5-aryl-4-pyridones-2-carboxylate and 5-aryl-3-cyano-5-methyl-2-pyridones (aryl=3-thienyl, 2-furyl) are described.
Aziz Shahrisa, Salar Hemmati
doaj
3-Cyano-4,6-dimethyl-2-pyridone (Guareschi pyridone)
Acta Crystallographica Section E Structure Reports Online, 2004 In the crystal structure of the title compound, C8H8N2O, the molecules form centrosymmetric dimers via N—H⋯O hydrogen bonds.
Victor B. Rybakov +3 more
openaire +2 more sources