Design, Synthesis, and Anti-mycobacterial Evaluation of New 3,5-Disubstituted-pyrazole-1-carbothioamides

Kok Tong Wong, Hasnah Osman, Thaigarajan Parumasivam, Muhammad Solehin Abd Ghani, Mohd Zaheen Hassan, Unang Supratman, Mohamad Nurul Azmi Mohamad Taib*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Two series of new 3,5-disubstituted-pyrazole-1-carbothioamides (4a-f and 5a-e) were designed and synthesized through condensation reaction between chalcones and thiosemicarbazides under alkaline condition via cyclocondensation reaction. The structures have been elucidated by Fourier-transform infrared (FTIR), High-resolution mass spectrometry (HRMS), one-and two-dimensional nuclear magnetic resonance (NMR) analyses. These compounds were assayed for in vitro anti-tuberculosis activity against Mycobacterium tuberculosis H37Ra using the Tetrazolium microplate assay (TEMA) method. As a result, six compounds (i.e., 4a, 4d, 4f, 5a, 5c, and 5d) showed a weak activity with minimum inhibition concentration (MIC) between 650–530 μM, and other compounds showed no inhibition against MTB. In addition, all tested compounds also did not show any cidal effects for minimum bactericidal concentration (MBC), even at the highest test concentration.

Original languageEnglish
Pages (from-to)703-713
Number of pages11
JournalIndonesian Journal of Chemistry
Volume22
Issue number3
DOIs
StatePublished - Jun 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022, Gadjah Mada University. All rights reserved.

Keywords

  • 3,5-disubstituted-pyrazole-1-carbothioamide
  • Mycobacterium tuberculosis
  • anti-mycobacterial
  • antitubercular agents
  • pyrazolines

ASJC Scopus subject areas

  • General Chemistry

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