Abstract
A novel series of pyrazolyl[1,2,4]triazoles has been synthesized by the reaction of polyfunctionalized-triazole 1 with symmetric and asymmetric β-dicarbonyl compounds in ortho-phosphoric acid. Also, we found that the reaction between triazole 1 and arylidene malononitriles in DMF afforded Schiff base compounds 9a,b instead of the target pyrazolyl[1,2,4]triazole 8a,b. The same products 9a,b were synthesized via the reaction of triazole 1 with the corresponding aromatic aldehydes. Moreover, a new series of 6-methyl-6-aryl-5,6-dihydro[1,2,4]triazolo[4,3-b][1,2,4,5]tetrazine-3-thiol 11a,b and 9-amino-5-methyl-3,5-diphenyl-8-sulfanyl-2,4,5,9-tetrahydro-3H-[1,2,4]triazolo[5,1-c][1,2,4]triazepin-3-ol 12a has been successfully synthesized by the reaction of triazoles 1 with acetophenone derivatives.
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Acknowledgements
The authors acknowledge the Deanship of Scientific Research, Vice Presidency for Graduate Studies and Scientific Research at King Faisal University, Saudi Arabia, for financial support under the annual funding track (GRANT 5850).
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A.H.M. participated in the creation of the plan and helped with the writing, discussion, and article revision. A.A.A. initiated and planned the chemistry experiment, synthesized and characterized the samples, wrote the draft, and discussed the outcomes. M.M.K. and H.M.A. contributed to the idea of chemical experiments, discussing the results, and revising the paper. All authors reviewed the manuscript.
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Full experimental detail, 1H, 13C NMR, and NOESY spectra for all new compounds 2-12. This material can be found through the “Supplementary Content” section of this article’s webpage.(DOCX 1426 KB)
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Khalaf, M.M., El-Lateef, H.M.A., Amer, A.A. et al. Synthesis of some novel 4-amino-4H-1,2,4-triazole-3-thiol derivatives. J IRAN CHEM SOC 21, 1291–1297 (2024). https://doi.org/10.1007/s13738-024-02997-w
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DOI: https://doi.org/10.1007/s13738-024-02997-w