4974-44-1Relevant academic research and scientific papers
7-Amino-2-aryl/hetero-aryl-5-oxo-5,8-dihydro[1,2,4]triazolo[1,5-a]pyridine-6-carbonitriles: Synthesis and adenosine receptor binding studies
Shaik, Khasim,Deb, Pran Kishore,Mailavaram, Raghu Prasad,Chandrasekaran, Balakumar,Kachler, Sonja,Klotz, Karl-Norbert,Jaber, Abdul Muttaleb Yousef
, p. 1568 - 1573 (2019/05/27)
A series of novel 7-amino-5-oxo-2-substituted-aryl/hetero-aryl-5,8-dihydro[1,2,4]triazolo[1,5-a]pyridine-6-carbonitriles (4a–4t) was synthesized, characterized and evaluated for their binding affinity and selectivity towards hA1, hA2A/sub
N-Substituted cyanacetohydrazides in the synthesis of 3,3-dialkyl-1,2,3,4-tetrahydroisoquinolines by Ritter reaction
Mikhailovskii, Alexander G.,Korchagin, Denis V.,Yusov, Aleksey S.,Gashkova, Oksana V.
, p. 1114 - 1119 (2017/12/08)
[Figure not available: see fulltext.] Cyanacetohydrazide, protected at the nitrogen atom of hydrazide group, underwent cyclocondensation by Ritter reaction with 3,3-dialkylbenzylcarbinols, forming 3,3-dialkyl-1,2,3,4-tetrahydroisoquinolines. The reagents
Synthesis, anti-hepatitis B and C virus activity and antitumor screening of novel thiazolo[4,5-D]-pyrimidine derivatives
Becan, Lilianna,Wójcicka, Anna
, p. 107 - 114 (2016/03/19)
The paper describes the synthesis, antivirus and antitumor evaluation of novel thiazolo[4,5-d]pyrimidine derivatives. The target compounds 3a-h were synthesized by cyclocondensation of 4-amino-Ni-(phenylmethylidene)- 3-phenyl-2-thioxo-2,3-dihydrothiazole-
Microwave assisted synthesis and evaluation of N-cinnamoyl aryl hydrazones for cytotoxic and antioxidant activities
Devi, T. Sarala,Rajitha
, p. 1703 - 1709 (2016/08/06)
A series of N-cinnamoyl aryl hydrazones 2a-2i were synthesized in good yields by microwave irradiation technique. The title compounds were formed by nucleophilic condensation of various N1- substituted benzylidene-2-cyano aceto hydrazides with
Ionic liquid and Lewis acid combination in the synthesis of novel (E)-1-(benzylideneamino)-3-cyano-6-(trifluoromethyl)-1H-2-pyridones
Moreira, Dayse N.,Frizzo, Clarissa P.,Longhi, Kelvis,Soares, Aline B.,Marzari, Mara R.B.,Buriol, Lilian,Brondani, Sergio,Zanatta, Nilo,Bonacorso, Helio G.,Martins, Marcos A.P.
body text, p. 1265 - 1270 (2012/06/04)
In this work, a new catalytic system to synthesize a series of new (E)-1-(benzylideneamino)-3-cyano-6-(trifluoromethyl)-1H-2-pyridones from the cyclo-condensation reaction of benzylidene cyanoacetohydrazide with 4-alkoxy-1,1,1-trifluoro-3-alken-2-ones [CF3C(O)C (R2) = C(R1)(OR), where R = Me, Et; R1 = H, Me, Pr, Bu, Ph, 4-Me-Ph, 4-F-Ph, 4-Cl-Ph, 4-Br-Ph; R2 = H, Me and R 1,R2 = -(CH2)4-] is presented. The products were obtained at room temperature in moderate to good yields (42-87%). Comparison of the catalytic system with a conventional method was not possible, because the products were obtained only when the new catalyst system - consisting of triethylamine and Lewis acid in ionic liquid [BMIM][BF 4] - was used. Springer-Verlag 2011.
Facile route for the synthesis of pyridazine derivatives: Unexpected pathway to benzothiazole, benzimidazole, and triazole derivatives
El Rady, Eman A.
, p. 37 - 49 (2007/10/03)
4-Amino-5-arylmethylidene-3-phenyl-pyridazin-6-ones 7 have been synthesized and reacted with selected nucleophile reagents such as phenyl hydrazine, semicarbazide, semithiocarbazide, cyanoacetohydrazide, 2-aminothiophenol, and 2-phenylenediamine in ethanol triethyl-amine solution. An unexpected 1-phenyl-3-arylaziridene 10, 3-aryl-5-oxo(thio)-1,2,4-triazole 21, 4-amino-3-aryl-6-hydroxy-pridazine 27, 2-arylbenzothiazole 30a-c, and 2-arylbenzimidazole 30d-f have been obtained, respectively. Also, 2-aminothiophenol and 2-phenylenediamine were reacted with N-phenylmethylidene- 2-cyanoacetohydrazide 2, affording the new 1,4-benzodiazepine derivatives 35. Copyright Taylor & Francis LLC.
Structure of cyanoacetylhydrazones of aldehydes and ketones
Zelenin,Oleinik,Alekseev,Potekhin
, p. 1116 - 1120 (2007/10/03)
1D 1H and 13C, and 2D 1H NOESY NMR were used to establish that cyanoacetylhydrazones of aliphatic and aromatic aldehydes and ketones in CDCl3 and (CD3)2SO solutions have a linear structure,
Studies with Polyfunctionally Substituted Heteroaromatics: A Route for the Synthesis of Substituted [1,2,4]Triazolo[1,5-a]pyridines
Al-Najjar, Abdul Aziz A.,Amer, Samier Abdul Rahman,Riad, Mohamed,Elghamry, Ibrahim,Elnagdi, Mohamed Hilmy
, p. 296 - 297 (2007/10/03)
N-Arylmethylidene-2-cyanoacetohydrazides react with arylmethylidenemalonitriles to afford [1,2,4]triazolo[1,5-a]pyridinones, and with both malononitrile and ethyl cyanoacetate to afford N-aminopyridinones.
Pyrolysis of amino nitriles, cyanohydrazones, and cyanoacetamides. Part I. Elimination reaction of 1-arylmethyleneamino-1,2-dihydro-4, 6-dimethyl-2-oxopyridine-3-carbonitriles and substituted benzaldehyde cyanoacetylhydrazones
Al-Awadi,Elnagdi,Mathew,El-Gamry,Abdel Khalik
, p. 741 - 748 (2007/10/03)
Pyrolysis of the Schiff bases of 1-arylmethyleneamino-1,2-dihydro-4, 6-dimethyl-2-oxopyridine-3-carbonitriles (1-5) has been studied. These compounds eliminate via a six-membered transition state to produce substituted benzonitriles and 2-hydroxy-4,6-dimethylpyridine-3-carbonitrile. These eliminations are unimolecular first-order reactions. The kinetic data gave a good correlation with σ0 values of the substituents on the aryl group with ρ = 0.83 at 520 K. Utilization of the pyrolytic reaction in synthesis of various benzonitriles is considered, and mechanistic information has been obtained by comparing the kinetic data and product analysis of the Schiff bases with their open-chain substituted benzaldehyde cyanoacetylhydrazones (6-9) analogues.
