Abstract
In this work, a unique pyrazolyl compounds comprising flourine and thiophene were synthesized. In brief, esters 3a-f were synthesized by reacting thiophene and pyrazolyl acid (1) with various 2-hydroxyacetophenones (2a-f). The 1,3-diketones 4a-f were formed by Baker- Venkataraman rearrangement of esters 3a-f. Compounds 4a-f were cyclized to form chromene derivatives 5a-f, which further converted into pyrazolyl derivatives 6a-f. The majority of the compounds in series 3a-f, 4a-f, 5a-f and 6a-f showed promising antibacterial activity against S. typhii, S. aureus, B. subtilis and E. coli. Compounds 4e and 4f exhibited considerable antifungal activity against A. niger, while the majority of the compounds had promising activity against T. viride. At 1 mg/mL concentration, some of the synthesized compounds shown potential α-amylase inhibitory action.
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