Main Article Content
Abstract
Several new substituted thiadiazole pyrazolene anthranilic acid derivatives were synthesized. These compounds also evaluated for their anti-inflammatory and analgesic activities. Compound 2-((5-(3-(2,6-dichloro)acrylamido)-1,3,4-thiadiazol-2-yl)methyl amino)-benzoic acid (5b) and 2-((5-(1-acetyl-5-(2,6-dichloro)-4,5-dihydro-1H-pyrazol-3-ylamino)-1,3,4-thiadiazol-2-yl)methyl amino)benzoic acid (6b) were found to be most active compounds of this series, which exhibits 38.10 & 48.50% anti-inflammatory activity while, 36.24 & 40.10 % analgesic activity, respectively. The structures of all the compounds were characterized by analytical data, IR, 1H NMR and mass spectrometry.
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Copyright (c) 2022 Asian Journal of Organic & Medicinal Chemistry

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References
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A.A. El-Azzouny, Y.A. Maklad, H. Bartsch, W.A. Zaghary, W.M. lbrahim and M.S. Mohamed, Sci. Pharm., 71, 331 (2003); https://doi.org/10.3797/scipharm.aut-03-28
U. Misra, A. Hitkari, A.K. Saxena, S. Gurtu and K. Shanker, Biologically Active Indolylmethyl-1,3,4-oxadiazoles, 1,3,4-Thiadiazoles, 4H-1,3,4-Triazoles and 1,2,4-Triazines, Eur. J. Med. Chem., 31, 629 (1996); https://doi.org/10.1016/0223-5234(96)89559-6
A. Andreani, M. Rambaldi, A. Locatelli and G. Pifferi, Synthesis and Antiinflammatory Activity of Indolylacrylic and Methylacrylic Acids, Eur. J. Med. Chem., 29, 903 (1994); https://doi.org/10.1016/0223-5234(94)90115-5
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V. Kumar, P.K. Goswami, Balendra, S. Tewari and A. Ramanan, Multicomponent Solids of Niflumic and Mefenamic Acids Based on Acid-Pyridine Synthon, Front. Chem., 10, 729608 (2022); https://doi.org/10.3389/fchem.2022.729608
J. Hill and N.H. Zawia1, Fenamates as Potential Therapeutics for Neurodegenerative Disorders, Cells, 10, 702 (2021); https://doi.org/10.3390/cells10030702
P.K. Dubey, T. Venkateshwar Kumar, P. Raddanna and K. Anil Kumar, Synthesis of [2-(3-Oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6- carbonyl)-1H-indol-3-yl]acetic Acids as Potential COX-2 Inhibitors, Indian J. Chem., 45B, 2128 (2006).
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S.A.F. Rostom, I.M. El-Ashmawy, H.A.A. El-Razik, M.H. Badr and H.M.A. Ashour, Design and Synthesis of Some Thiazolyl and Thiadiazolyl Derivatives of Antipyrine as Potential Non-Acidic Anti-Inflammatory, Analgesic and Antimicrobial agents, Bioorg. Med. Chem., 17, 882 (2009); https://doi.org/10.1016/j.bmc.2008.11.035
H.N. Hafez, M.I. Hegab, I.S. Ahmed-Farag and A.B.A. El-Gazzar, A Facile Regioselective Synthesis of Novel Spiro-Thioxanthene and Spiroxanthene-9¢,2-[1,3,4]thiadiazole Derivatives as Potential Analgesic and Anti-inflammatory Agents, Bioorg. Med. Chem. Lett., 18, 4538 (2008); https://doi.org/10.1016/j.bmcl.2008.07.042
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A.A. Bekhit, H.M.A. Ashour, Y.S. Abdel Ghany, A. El-Din A. Dekhit and A. Baraka, Synthesis and Biological Evaluation of Some Thiazolyl and Thiadiazolyl Derivatives of 1H-Pyrazole as Anti-inflammatory Antimicrobial Agents, Eur. J. Med. Chem., 43, 456 (2008); https://doi.org/10.1016/j.ejmech.2007.03.030
U. Salgin-Goksen, N. Gokham-Kelekci, O. Goktas, Y. Koysal, E. Kilic, S. Isik, G. Aktay and M. Ozalp, 1-Acylthiosemicarbazides, 1,2,4-Triazole-5(4H)-thiones, 1,3,4-Thiadiazoles and Hydrazones containing 5-Methyl-2-benzoxazolinones: Synthesis, Analgesic-Anti-inflammatory and Antimicrobial Activities, Bioorg. Med. Chem., 15, 5738 (2007); https://doi.org/10.1016/j.bmc.2007.06.006
E. Bansal, V.K. Srivastava and A. Kumar, Synthesis and Anti-Inflammatory Activity of 1-Acetyl-5-substituted Aryl-3-(b-amino-naphthyl)-2-pyrazolines and b-(Substituted daminoethyl)amidonaph-thalenes, Eur. J. Med. Chem., 36, 81 (2001); https://doi.org/10.1016/S0223-5234(00)01179-X
T. Chandra, N. Garg, S. Lata, K.K. Saxena and A. Kumar A. Synthesis of Substituted Acridinyl Pyrazoline Derivatives and their Evaluation for Anti-Inflammatory Activity, Eur. J. Med. Chem., 45, 1772 (2010); https://doi.org/10.1016/j.ejmech.2010.01.009
Y. Li, J. Geng, Y. Liu, S. Yu and G. Zhao, ChemMedChem, 8, 27 (2013); https://doi.org/10.1002/cmdc.201200355
B. Varghese, S.N. Al-Busafi, F.E.O. Suliman and S.M.Z. Al-Kindy, RSC Adv., 7, 46999 (2017); https://doi.org/10.1039/c7ra08939b
A. Aboelnaga, E. Mansour, H.A. Ahmed and M. Hagar, Synthesis of Asymmetric Pyrazoline Derivatives from Phenylthiophenechalcones; DFT Mechanistic Study, J. Korean Chem. Soc., 65, 113 (2021); https://doi.org/10.5012/jkcs.2021.65.2.113
Q.E. Smith, Pharmacological Screening Tests Progress in Medicinal Chemistry, Butterworth: London, vol. I (1960).
M. Verma, J.N. Sinha, V.R. Gujrati, T.N. Bhalla, K.P. Bhargava and K. Shanker, A New Potent Anti-inflammatory Quinazolone, Pharmacol. Res. Commun., 13, 967 (1981); https://doi.org/10.1016/S0031-6989(81)80068-9
C.A. Winter, E.A. Risley and G.W. Nuss, Carrageenin-Induced Edema in Hind Paw of the Rat as an Assay for Antiinflammatory Drugs, Exp. Biol., 111, 544 (1962); https://doi.org/10.3181/00379727-111-27849
B.A. Berkowitz, A.D. Finck and S.H. Ngai, Nitrous Oxide Analgesia: Reversal by Naloxone and Development of Tolerance, J. Pharmacol. Exp. Ther., 203, 539 (1977).