Microwave Assisted Preparation of New Dicoumarinyl Pyrazoline Derivatives as Antimicrobials

ISSN: 2213-3364 (Online)
ISSN: 2213-3356 (Print)

Volume 1, 2 Issues, 2014

Current Microwave Chemistry

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Bimal K. Banik
Department of Chemistry
College of Science & Mathematics
The University of Texas-Pan American
1201 West University Drive
Edinburg, Texas

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Microwave Assisted Preparation of New Dicoumarinyl Pyrazoline Derivatives as Antimicrobials

Author(s): Hemali B. Lad, Rakesh R. Giri, Chirag V. Patel, Varun G. Bhila and Dinkar I. Brahmbhatt

Affiliation: Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar-388120, Gujarat, India.


Some new 3-[7-methoxy-2H-1-benzopyran-2-one-4-yl]-1-(coumarin-3-yl)prop-2-en-1-ones 5a-d (dicoumarinyl chalcones) were synthesized by Wittig reaction of 3-[(triphenylphosphinyl)acetenyl]coumarins 3a-d and 7-methoxy-4- formylcoumarin 4. These chalcones were then utilized for the synthesis of dicoumarinyl pyrazolines 6a-h and 7a-l under microwave irradiation. All the synthesized compounds 5a-d, 6a-h and 7a-l were characterized by IR, 1H NMR, 13C NMR, mass spectral data and elemental analysis. The compounds were subjected to in vitro antimicrobial screening against a representative panel of bacteria (Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Salmonella typhi) and fungi (Aspergillus niger, Candida albicans).

Keywords: Antimicrobial screening, aspergillus niger, bacillus subtilis, broth dilution method, candida albicans, diastereotopic protons, dicoumarinyl chalcones, dicoumarinyl pyrazolines, escherichia coli, 7-methoxy-4-formylcoumarin, microwave irradiation, salmonella typhi, staphylococcus aureus, 3-[(triphenylphosphinyl)- acetenyl]coumarins, wittig reaction.

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Article Details

Volume: 1
Issue Number: 1
First Page: 64
Last Page: 74
Page Count: 11
DOI: 10.2174/221333560101140519152017

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