Design, synthesis, anti-cancer screening and structure activity relationship studies of biphenyl linked fused imidazoles

Rahul Singh, Mallesh Pandrala, Sanjay V. Malhotra, Ganesh P. Pawar, Vinod D. Chaudhari, Deepak B. Salunke

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Biphenyl is a privileged scaffold observed in several marketed drugs and is known to predominantly bind to a wide range of proteins with high specificity. Fused imidazole is another privileged structure which is found in several bioactive compounds. The present investigation describes the design and synthesis of a biprivileged compound library comprising biphenyl linked fused imidazoles and their activity against NCI-60 cell line to identify potential 'hits' for further anti-cancer drug discovery. In the preliminary investigation, imidazo[1,2-a]pyridine based heterocycles having tert-alkyl amine and a biphenyl substituent demonstrated promising results against some of the leukaemia, colon cancer, ovarian cancer as well as breast cancer cell lines. The active compounds were also found to be non-toxic to several other cancer cell lines, warranting further structure activity relationship (SAR) investigation. A systematic structural modifications and bioactivity evaluation against NC-I60 cell line resulted in the identification of 2-aryl-N-(2,4,4-trimethylpentan-2-yl)imidazo[1,2-a]pyrazin-3-amine scaffold with biphenyl, benzo[d][1,3]dioxole and 4-(trifluoromethyl)benzene as substituents at C-2 position showing anticancer activity.

Original languageEnglish (US)
Pages (from-to)1237-1244
Number of pages8
JournalJournal of the Indian Chemical Society
Issue number8
StatePublished - Aug 2020


  • Biphenyl
  • Fused imidazoles
  • NCI-60
  • Privileged scaffold
  • SAR

ASJC Scopus subject areas

  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrochemistry


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