Abstract
This study reports a facile mechanochemical conversion of N-phenylthiosemicarbazone derivatives of 1-tetralone analogs into thiazolidin-4-ones, thiazolidin-5-ylidene-acetates, and dihydrothiazoles by their condensation with chloroacetic acid, DMAD, and phenacyl bromide, respectively. Triethylammonium hydrogen sulfate [Et3NH]+ [HSO4]− is employed as solid catalyst for this prompt and ecological conversion through which the target products are formed within 10–30 minutes in quantitative yields. The products have been characterized on the basis of spectroscopic data. X-ray diffraction studies of thiazolidin-5-ylidene-acetate 5b, supported by DFT calculations of E/Z isomers of 5b, are presented. Compounds 4, 5, and 7 are assayed for their antibacterial prospects against Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) bacterial stains. Some derivatives show highly promising antibacterial activities.
Graphical Abstract
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Declaration of competing interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.