Crystal structures and biological activity of homologated (N)-n-alkylammonium salts of 2-bromo-3-oxido-1,4-naphthoquinone

  • Dinkar Choudhari
  • Debamitra Chakravarty
  • Dipali N. Lande
  • Sana Parveen
  • Shridhar P. Gejji
  • Kisan M. Kodam
  • Sunita Salunke-GawaliEmail author
Original Research


Homologated (N)-n-alkylammonium salts of 2-bromo-3-oxido-1,4-naphthoquinone (BS-1 to BS-8) have been synthesized and characterized from the single crystal X-ray diffraction experiments combined with density functional theory. The crystal structures revealed diverse noncovalent interactions such as hydrogen bonding, π∙∙∙π, Br∙∙∙π, and others. The measured antifungal activities of the BS-1 to BS-6 against fungal strains Saccharomyces cerevisiae and Candida albicans suggest them to be effective compared to standard drug amphotericin B. Antibacterial activity of BS-1 to BS-6 has been evaluated against Gram-positive and Gram-negative bacteria.


Naphthoquinone Crystal structures Hydrogen bonding π∙∙∙π interactions Antibacterial, antifungal and antiproliferative activity 



SSG grateful to RGYI scheme of Department of Biotechnology, New Delhi, India for Ref. No. (BT/PR6565/GBD/27/456/2012). DC acknowledge to University Grants Commission (UGC), New Delhi, India, for meritorius fellowship. SPG acknowledges support from the Research Project (37(2)/14/11/2015-BRNS) from the Board of Research in Nuclear Sciences (BRNS), India. DNL is thankful to Savitribai Phule Pune University for the award of research fellowship through the University of Potential excellence scheme of UGC, New Delhi, India. SPG and DNL thank the Center for Development of Advanced Computing (CDAC), Pune for providing National Param Supercomputing Facility.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical statement

All the ethical guidelines have been adhered.

Supplementary material

11224_2019_1343_MOESM1_ESM.docx (5.3 mb)
ESM 1 Figures of FTIR, 1H and 13C NMR, DEPT NMR, UV-Visible spectra. Tables FT-IR data, chemical shifts from 1H, 13C NMR spectra, crystallography tables. Crystallographic data have been deposited with the Cambridge Crystallographic Data Centre and may be obtained on request quoting the deposition number CCDC 1504323 for BS-1, 1550877 for BS-2, 1504325 for BS-3, 1546317 for BS-4, 1504324 for BS-5, 1504326 for BS-6, 1504327 for BS-7 and 1504328 for BS-8, CCDC, 12 Union Road, Cambridge CB21EZ, UK (Fax: +441,223 336,033; E-mail address: (DOCX 5437 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of ChemistrySavitribai Phule Pune UniversityPuneIndia
  2. 2.Central Instrumentation Facility, Department of ChemistrySavitribai Phule Pune UniversityPuneIndia

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