SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF NOVEL PYRAZOLO[3,4-b]PYRIDINES AND THEIR SPIRO-HETEROCYCLIC DERIVATIVES

Authors

  • Shawkat A. Abdelmohsen Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516
  • Talaat I El Emary Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516

DOI:

https://doi.org/10.24297/jac.v10i7.6802

Keywords:

Pyrazolo[3,4-b]pyridine, Chalcones, Heterocyles, Spiroindolylpyrazolopyridine, Antimicrobial

Abstract

The present work describes the synthesis of a novel series of heterocyclic moieties derived from 5-acetylpyrazolo[3,4-b]pyridine (1). The formation of chalcones (2a-d) was utilized to synthesize pyrazoline, isoxazoline and pyrimidine derivatives (3-10). Thiosemicarbazone and semicarbazone (11, 17) were utilized to synthesize other new triazolethiones, thiadiazole and selenadiazole derivatives (11-19). Some new spiro derivatives (22-25) were synthesized by the reaction of chalcone (21) of 1 and isatine with hydrazines, hydroxyl amines and thiourea. Also, The reaction of 1 with cyanoacetyl hydrazine gave the hydrazide-hydrazone derivative 26, which was allowed to react with aromatic aldehydes and α-cyanocinnamonitrile to afford coumarine and substituted pyridine derivatives (28, 29). The structures of all the new compounds have been established on the basis of their analytical and spectral data. Twenty two of the synthesized compounds were also evaluated for their antibacterial and antifungal activity against various strains of bacteria and fungi and most are found to possess promising antimicrobial activity when compared with Chloramphenicol and Clotrimazole

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References

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Published

2014-01-22

How to Cite

Abdelmohsen, S. A., & Emary, T. I. E. (2014). SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF NOVEL PYRAZOLO[3,4-b]PYRIDINES AND THEIR SPIRO-HETEROCYCLIC DERIVATIVES. JOURNAL OF ADVANCES IN CHEMISTRY, 10(7), 2901–2915. https://doi.org/10.24297/jac.v10i7.6802

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