Molecular Diversity

, Volume 22, Issue 4, pp 769–778 | Cite as

Conventional and microwave-assisted synthesis of new indole-tethered benzimidazole-based 1,2,3-triazoles and evaluation of their antimycobacterial, antioxidant and antimicrobial activities

  • Dongamanti AshokEmail author
  • Srinivas Gundu
  • Vikas Kumar Aamate
  • Mohan Gandhi Devulapally
Original Article


A new series of triheterocycles containing indole–benzimidazole-based 1,2,3-triazole hybrids have been synthesized in good yields via a microwave-assisted click reaction. All the compounds were characterized by IR, \(^{1}\hbox {H}\) NMR, \(^{13}\hbox {C}\) NMR and mass spectroscopy and were evaluated for their in vitro antitubercular activity against the Mycobacterium tuberculosis H37Rv strain. Compounds 4b, 4h and 4i displayed highly potent antitubercular activity with MIC 3.125–6.25 \(\upmu \hbox {g}/\hbox {mL}\). The antioxidant potential was evaluated using 2,2-diphenyl-1-picryl hydrazine and \(\hbox {H}_{2}\hbox {O}_{2}\) radical scavenging activity, and compounds 4e,4f and 4g showed excellent radical scavenging activity with \(\hbox {IC}_{50}\) values in the range of 08.50–10.05 \(\upmu \hbox {g}/\hbox {mL}\). Furthermore, the compounds were evaluated for antimicrobial activity against numerous bacterial and fungal strains, and compounds 4b, 4c and 4h were found to be the most promising potential antimicrobial molecules with MIC 3.125–6.25 \(\upmu \hbox {g}/\hbox {mL}\).


Indole Benzimidazole 1, 2, 3-Triazole Click chemistry Microwave irradiation Antitubercular Antioxidant Antimicrobial 



The authors are thankful to the Head, Department of Chemistry, Osmania University, for providing laboratory facilities and CFRD, OU, for providing spectral analysis. Srinivas Gundu is thankful to the Council of Scientific and Industrial Research, New Delhi, for the award of the senior research fellowship.

Compliance with ethical standards

Conflict of interest

The authors confirm that this article content has no conflict of interest.

Supplementary material

11030_2018_9828_MOESM1_ESM.docx (2.5 mb)
Supplementary material 1 (docx 2559 KB)


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Dongamanti Ashok
    • 1
  • Srinivas Gundu
    • 1
  • Vikas Kumar Aamate
    • 1
  • Mohan Gandhi Devulapally
    • 1
  1. 1.Department of Chemistry, Green and Medicinal Chemistry LaboratoryOsmania UniversityHyderabadIndia

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