Results 101 to 110 of about 7,227 (222)
Copper-Catalyzed Regioselective Imidation of 2‑Pyridones
We demonstrate a ligand- and glovebox-free regioselective direct C(3)–H imidation of 2-pyridones and also benzylic-type imidation of 2-pyridones bearing a methyl substituent employing Cu(OAc)2·H2O as the catalyst and N-fluorobenzenesulfonimide (NFSI) as ...
Alagiri Kaliyamoorthy (8706798) +4 more
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, 2017 Thesis: New Functionalisation Chemistry 2- and 4-Pyridones and Related Heterocycles.Support information (NMR data).NMR spectra: 1H,13C, DEPT.Thesis abstract: New methodology for the synthesis of several 4H-pyrido[1,2-a]pyrimidin-4-ones has been developed
George Weaver (1250037) +2 more
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Dakin-West Trick in the Design of Novel 2-Alkyl(aralkyl) Derivatives of Oxazolo[3,2-a]pyridines
Molecules, 2005 A series of previously unavailable derivatives of 2-alkyl- and 2-benzylderivatives of oxazolo[3,2-a]pyridines III were obtained via tandem ring opening and ring closure from stable mesoionic 3-acyloxazolo[3,2-a]pyridinium-2-olates I.
Eugene V. Babaev +2 more
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ChemistryOpen, 2019 1,2,4‐Oxadiazole[4,5‐a]piridinium chloride adds nucleophiles to undergo electrocyclic ring opening affording 1,2,4‐oxadiazole dienamino derivatives. These pyridinium salts represent a special class of Zincke salts that are prone to rearrange when treated
Dr. Stefano Carella +2 more
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Molecules, 2004 The reaction of 4-hydroxycoumarin (1) with some primary amines 2a-h and morpholine (2i) under microwave irradiation occurred without opening of the lactone ring to give N-substituted 4-aminocoumarins 3a-i in excellent yields.
Ivo C. Ivanov, Edmont V. Stoyanov
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STRUCTURE OF PYRIDONES, PYRIMIDONES, AND THEIR CATIONS.
, 1965 STRUCTURE OF PYRIDONES, PYRIMIDONES, AND THEIR ...
JAMES PRIEST. SHOFFNER (7967351)
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Synthesis of 5-(substituted phenylazo)-6-hydroxy-4-methyl-3-cyano-2-pyridones from ethyl 3-oxo-2-(substituted phenylazo)butanoates, Short communication [PDF]
Journal of the Serbian Chemical Society, 2011 A new procedure for the synthesis of known azo pyridone dyes is presented. A series of 5-(substituted arylazo)-6-hydroxy-4-methyl-3-cyano-2-pyridones were prepared from ethyl 3-oxo-2-(substituted phenylazo)butanoates and cyanoacetamide in acetone using ...
GORDANA UŠĆUMLIĆ +3 more
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SYNTHESIS AND ANTIINFLAMMATORY ACTIVITY OF SOME NOVEL THIENOPYRIMIDINE DERIVATIVES
Zagazig Journal of Pharmaceutical Sciences, 2004 4-Chloro-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidine (3) was reacted with 4-aminoacetophenone in ethanol to give 4(4- acetylanilino)5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidine (4).
Zakaria Abd El-Samii +3 more
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A one-pot, metal-free approach to bicyclic 2-pyridones
, 2017 A practical one-pot process based on two-fold intramolecular cyclizations provides a more expedient entry into a variety of bicyclic 2-pyridones.
Wannaporn Disadee, Somsak Ruchirawat
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, 1961 By condensation rnf meconic acid, comenic acid, or comenic acid methyl ether with primary aromatic amines, 1-aryl-5-hydroxy-4- -pyridone-2-carboxylic acids, or their methyl ethers, were obtained with satisfactory yields.
Hahn, V. +3 more
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