Results 31 to 40 of about 24,429,900 (206)
Synthesis and Reactivity of N-Acyl-5- (1-hydroxyalkyl)-2,3-dihydro-4-pyridones
, 2016 The Nozaki−Hiyama−Kishi reaction was used to prepare the 5-(1-hydroxyalkyl)-2,3-dihydro-4-pyridones 3.
Anne-Cécile Hiebel (2480971) +2 more
core +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
Pyridonderivate aus 3-Amino-2H-azirinen und Cyclopropenonen
CHIMIA, 1978 Reaction of the 3-dimethylamino-2H-azirines 1a and 1b with diphenylcyclopropenone (2a) in ether or acetonitrile leads to the 2-dimethylamino-5,6-diphenyl-4(3H)-pyridones 3a and 3b in 70 and 80% yield, respectively. The structure of these 1:1-adducts has
Stanislav Chaloupka, Heinz Heimgartner
doaj +1 more source
Photochemical Cycloadditions to 5,6-Dihydro-4-pyridones
CHIMIA, 1987 5,6-Dihydro-4-pyridones (3a-3c) undergo photochemical [2 + 2]-cycloaddition with olefins activated by an electron withdrawing group. Alkyl substituted double bonds could only be brought to react in the intramolecular cases 3d and 3e.
Philippe Guerry, Reinhard Neier
doaj +1 more source
Molecules, 2000 Reaction of 4-hydroxy-6-methyl-2-pyrone (1a) as well as 4-hydroxy-6-methyl-2(1H)-pyridones (1b-d) with arylmethylene malononitriles or arylmethylene methyl cyanoacetates (2a-h) leads to the formation of the very stable 5,6-fused bicyclic 2-amino-4Hpyran ...
Dieter Heber +2 more
doaj +1 more source
Versatile Synthesis of 3,5-Disubstituted 2-Fluoropyridines and 2-Pyridones
, 2016 5-Bromo-2-fluoro-3-pyridylboronic acid (3) was prepared in high yield by ortho-lithiation of 5-bromo-2-fluoropyridine (1), followed by reaction with trimethylborate.
Timothy Gallagher (1261572) +1 more
core +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
Synthesis, properties and color assessment of some new 5-(3- and 4-substituted phenylazo)-4,6-dimethyl-3-cyano-2-pyridones [PDF]
Journal of the Serbian Chemical Society, 2006 A series of 5-(3- and 4-substituted phenylazo)-4,6-dimethyl-3-cyano-2-pyridones were synthesized, starting from acetylacetone and arenediazonium salt, followed by condensation with cyanoacetamide using a modified literature procedure.
Mijin Dušan +5 more
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
Palladium-catalyzed selective oxidative olefination and arylation of 2-pyridones
, 2012 Substrate-controlled selective oxidative olefination of N-protected 2-pyridones has been achieved under palladium catalysis. The 5-position selectivity was followed for N-protected simple pyridones.
李兴伟 +4 more
core +1 more source