Convenient Synthesis of New Boric Acid Catalyzed 1,2,4-Triazolopyridinone Derivatives and an Investigation of their Optical Properties
Syntheses of fused heterobicyclic systems containing 1,2,4-triazolopyridinone moieties were accomplished by heterocyclization of 1,6-diamino-2-oxo-4-phenyl-1,2-dihydropyridine-3,5-dicarbonitriles and ninhydrin in ethanol and in the presence of boric acid as a catalyst in 30?min at room temperature. All compounds have been screened for their photophysical properties. Results showed that all compounds exhibit near infrared emissions at 876?nm.
Darehkordi, Ali,Hosseini, Maryam,Rahmani, Fariba
p. 1306 - 1311
(2019/02/19)
A three component one-pot synthesis of N-amino-2-pyridone derivatives catalyzed by KF-Al2O3
Synthesis of 1,6-diamino-4-phenyl-3,5-dicyano-2-pyridone derivatives via a one-pot, three-component reaction of aryl aldehydes, malononitrile, and cyanoacetic hydrazide at room temperature using KF-Al2O3 as a recyclable catalyst have been developed. The reaction proceeds through the initial Knoevenagel condensation between aldehyde and malononitrile in the presence of KF-Al2O3 to form the benzylidene derivative which then undergoes Michael addition with cyanoacetic hydrazide followed by intramolecular cyclization of the resulting intermediate to produce the N-amino-2-pyridones in good to excellent yields. The structure of the synthesized compounds were characterized and established on the basis of their spectral data analysis and single-crystal XRD analysis.
Kshiar,Shangpliang,Myrboh
supporting information
p. 1816 - 1827
(2018/06/25)
An efficient and ecofriendly synthesis of highly functionalized pyridones: Via a one-pot three-component reaction
A simple and convenient protocol has been developed for the synthesis of N-amino-3-cyano-2-pyridone derivatives by a one-pot reaction of cyanoacetohydrazide, activated nitrile substrates (malononitrile, ethyl cyanoacetate, cyanoacetamide) and aromatic ald
Hosseini, Hajar,Bayat, Mohammad
p. 27131 - 27143
(2018/08/17)
A simple route for the synthesis of pyrano[2,3-c]pyrazole and pyridine-2-one derivatives
A series of pyrano[2,3-c]pyrazoles and pyridine-2-ones were prepared through the ternary condensation of aldehydes with malononitrile and 3-methyl-1-phenyl-2-pyrazoline-5-one or 3-amino-2-pyrazolin-5-one or cyanoacetic acid hydrazide. Structure and reacti
Abdel Latif,Mekheimer,Ahmed,Abdel Aleem
p. 736 - 738
(2007/10/02)
A Convenient Synthesis of N-Amino-2-pyridones
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Soto, Jose L.,Seoane, Carlos,Zamorano, Pilar,Cuadrado, F. Javier
p. 529 - 530
(2007/10/02)
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