European Journal of Chemistry 2016, 7(3), 363-367 | doi: | Get rights and content


One-pot pseudo five-component synthesis and antioxidant evaluation of 4,4'-(aryl-methylene)bis(3-methyl-1-phenyl-1H-pyrazol-5-ol)

Moustafa Ahmed Gouda (1,*) , Majed Musallam Mutlaq Al‐Balawi (2) , Ameen Ali Abu-Hashem (3)

(1) Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
(2) Department of Chemistry, Faculty of Science and Arts, Taibah University, Ulla, 41411, Kingdom of Saudi Arabia
(3) Department of Photochemistry, National Research Center, Dokki, Giza 12622, Egypt
(*) Corresponding Author

Received: 09 Jul 2016 | Revised: 14 Jul 2016 | Accepted: 23 Jul 2016 | Published: 30 Sep 2016 | Issue Date: September 2016


A simple method for the synthesis of some 4,4'-(aryl-methylene)bis(3-methyl-1H-pyrazol-5-ol) derivatives via a one-pot pseudo five-component reaction of phenyl hydrazine, ethyl acetoacetate and aldehydes in acetic acid is reported. The prepared compounds were characterized by elemental analyses and spectral data. Some of the synthesized compounds were screened for their antioxidant activity using 2,2'-azino-bis(3-ethyl benzothiazoline-6-sulfonic acid (ABTS) method; all the investigated compounds showed similar and higher antioxidant activity than ascorbic acid and exhibited high protection against DNA damage induced by the bleomycin iron complex.


Arylmethylene; Bis-pyrazol-5-ol; Michael reaction; One pot reaction; Antioxidant activity; Tandem Knoevenagel reaction

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DOI: 10.5155/eurjchem.7.3.363-367.1474

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How to cite

Gouda, M.; Al‐Balawi, M.; Abu-Hashem, A. Eur. J. Chem. 2016, 7(3), 363-367. doi:10.5155/eurjchem.7.3.363-367.1474
Gouda, M.; Al‐Balawi, M.; Abu-Hashem, A. One-pot pseudo five-component synthesis and antioxidant evaluation of 4,4'-(aryl-methylene)bis(3-methyl-1-phenyl-1H-pyrazol-5-ol). Eur. J. Chem. 2016, 7(3), 363-367. doi:10.5155/eurjchem.7.3.363-367.1474
Gouda, M., Al‐Balawi, M., & Abu-Hashem, A. (2016). One-pot pseudo five-component synthesis and antioxidant evaluation of 4,4'-(aryl-methylene)bis(3-methyl-1-phenyl-1H-pyrazol-5-ol). European Journal of Chemistry, 7(3), 363-367. doi:10.5155/eurjchem.7.3.363-367.1474
Gouda, Moustafa, Majed Musallam Mutlaq Al‐Balawi, & Ameen Ali Abu-Hashem. "One-pot pseudo five-component synthesis and antioxidant evaluation of 4,4'-(aryl-methylene)bis(3-methyl-1-phenyl-1H-pyrazol-5-ol)." European Journal of Chemistry [Online], 7.3 (2016): 363-367. Web. 14 Jul. 2020
Gouda, Moustafa, Al‐Balawi, Majed, AND Abu-Hashem, Ameen. "One-pot pseudo five-component synthesis and antioxidant evaluation of 4,4'-(aryl-methylene)bis(3-methyl-1-phenyl-1H-pyrazol-5-ol)" European Journal of Chemistry [Online], Volume 7 Number 3 (30 September 2016)

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