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“Green synthesis” of benzothiazepine library of indeno analogues and their in vitro antimicrobial activity

1School of Chemical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, MS, India, 431606

2Maharashtra Udayagiri Mahavidyalaya, Udgir, MS, India, 413517

Citation Information: Chemical Papers. Volume 68, Issue 5, Pages 719–724, ISSN (Online) 1336-9075, DOI: 10.2478/s11696-013-0496-4, January 2014

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A novel series of indeno-benzothiazepine derivatives was synthesised via a “green” route. Synthesis of these compounds involves the treatment of dinucleophiles such as 2-aminobenzenethiols with α,β-unsaturated ketones in poly(oxyethylene) (poly(ethylene glycol), PEG-400) catalysed by acetic acid. The synthone α,β-unsaturated ketones were obtained by Claisen-Schmidt condensation of indan-1-one with substituted pyrazole-2-carbaldehydes prompted by bleaching earth (pH 12.5) as catalyst and PEG-400 as “green” reaction solvent. Screening of all the synthesised compounds for antimicrobial activity revealed that most of these compounds exhibited moderate to significant antimicrobial activity.

Keywords: indeno-benzothiazepine; PEG-400; bleaching earth; antimicrobial activity

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