Synthesis and antimicrobial screening of pyrimidine annulated dihydropyrano[2, 3-c] pyrazole derivatives

Hemant Hegde, Chuljin Ahn, Preeti Waribam, Nitinkumar S. Shetty

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A series of pyrimidine annulated dihydropyrano[2, 3-c]pyrazole derivatives were synthesized and screened for their antimicrobial activity. The precursor, dihydropyrano[2, 3-c]pyrazole was synthesised under catalyst free condition using PEG-400 as reaction medium which facilitated improved yield compared to base catalyzed reaction. Wide scope of substrates, simple workup procedure and high yield even in the absence of catalyst are the major highlights of the protocol. Dihydropyrano[ 2, 3-c]pyrazoles on condensation with formic acid formed pyrimidine annulated dihydropyrano[2, 3-c]pyrazole derivatives. All the products are characterized using FTIR, 1H-NMR and 13C-NMR spectroscopic techniques. The molecules have shown good to moderate activity as antimicrobial agents when compared to the standard drug ciprofloxacin.

Original languageEnglish
Pages (from-to)87-92
Number of pages6
JournalJournal of the Korean Chemical Society
Issue number2
Publication statusPublished - 01-01-2018


All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Chemical Engineering (miscellaneous)

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