European Journal of Chemistry 2014, 5(1), 24-32 | doi: https://doi.org/10.5155/eurjchem.5.1.24-32.870 | Get rights and content






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Synthesis and characterization of novel pyrazolone derivatives


Magda Ismail Marzouk (1,*) , Galal Hosni Sayed (2) , Mohamed Said Abd ElHalim (3) , Salma Yehia Mansour (4)

(1) Heterocyclic Synthetic Laboratory, Chemistry Department, Faculty of Science, Ain Shams University, Abbassia 11566, Cairo, Egypt
(2) Heterocyclic Synthetic Laboratory, Chemistry Department, Faculty of Science, Ain Shams University, Abbassia 11566, Cairo, Egypt
(3) Heterocyclic Synthetic Laboratory, Chemistry Department, Faculty of Engineering, Ain Shams University, Abbassia 11566, Cairo, Egypt
(4) Heterocyclic Synthetic Laboratory, Chemistry Department, Faculty of Science, Ain Shams University, Abbassia 11566, Cairo, Egypt
(*) Corresponding Author

Received: 10 Jul 2013 | Accepted: 26 Aug 2013 | Published: 31 Mar 2014 | Issue Date: March 2014

Abstract


The reactivity of hydrogen atoms at C-4 of pyrazolone 3 towards condensation reactions was studied by its reaction with p-anisaldehyde, malononitrile and/or ethyl acetoacetate in the presence of ammonium acetate and/or piperidine, glucose, phenyl isothiocyanate, 2-amino thiazole and aniline to afford compounds 4-6, 13, 15, 17 and 18, respectively. Reaction of amino carbonitrile 4 with ammonium thiocyanate, and formamide afforded compound 7 and pyrazolo[3,4-b]pyridinylformamide, 9. Reaction of compound 7 with hydrazine hydrate gave thiocyanato-1,3,4-thiadiazol-2-yl)-1H-pyrazolo[3,4-b]pyridin-6-amine derivative, 8. Acetylation of amino carbonitriles 4 and 5 afforded compound 10 and 11, respectively. Reaction of compound 11 with hydrazine hydrate afforded azanediyl compound 12. The pyrazolone 19 reacted with different nitrogen nucleophiles such as hydrazine hydrate, urea, thiourea and hydroxylamine hydrochloride to afford compounds 22-25. The reactivity of pyrazolone 19 as an α,β-unsaturated compound towards several carbon nucleophiles under Michael reaction was studied by its reaction with ethyl acetoacetate, ethyl cyanoacetate, and malononitrile under different reaction conditions and pyrazolone 3 to afford compounds 26-32, respectively. Synthesis of amino carbonitriles 5, pyrazolone 19 and pyrazolo[3,4-c]pyrazole 22 were carried out under microwave irradiation. The newly synthesized compounds were characterized by IR, 1H NMR and mass spectral data.


Keywords


Pyrazolone; Malononitrile; Azo compounds; Pyrazolo pyrimidine; Microwave irradiation; α,β-Unsaturated ketone

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DOI: 10.5155/eurjchem.5.1.24-32.870

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Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, Egypt

Citations

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[1]. Sundaravel Vivek Kumar, Shanmugam Muthusubramanian, Subbu Perumal
Recent Progress in the Synthesis of Pyrazolopyridines and Their Derivatives
Organic Preparations and Procedures International  51(1), 1, 2019
DOI: 10.1080/00304948.2018.1542517
/


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How to cite


Marzouk, M.; Sayed, G.; Abd ElHalim, M.; Mansour, S. Eur. J. Chem. 2014, 5(1), 24-32. doi:10.5155/eurjchem.5.1.24-32.870
Marzouk, M.; Sayed, G.; Abd ElHalim, M.; Mansour, S. Synthesis and characterization of novel pyrazolone derivatives. Eur. J. Chem. 2014, 5(1), 24-32. doi:10.5155/eurjchem.5.1.24-32.870
Marzouk, M., Sayed, G., Abd ElHalim, M., & Mansour, S. (2014). Synthesis and characterization of novel pyrazolone derivatives. European Journal of Chemistry, 5(1), 24-32. doi:10.5155/eurjchem.5.1.24-32.870
Marzouk, Magda, Galal Hosni Sayed, Mohamed Said Abd ElHalim, & Salma Yehia Mansour. "Synthesis and characterization of novel pyrazolone derivatives." European Journal of Chemistry [Online], 5.1 (2014): 24-32. Web. 13 Jul. 2020
Marzouk, Magda, Sayed, Galal, Abd ElHalim, Mohamed, AND Mansour, Salma. "Synthesis and characterization of novel pyrazolone derivatives" European Journal of Chemistry [Online], Volume 5 Number 1 (31 March 2014)

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DOI Link: https://doi.org/10.5155/eurjchem.5.1.24-32.870

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