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An efficient procedure was reported for the synthesis of novel hybrid dithiazoles 7 and thiazoles 15, in good yields, by applying hydrazonyl chlorides 4 with thiocarbohydrazone derivatives 3 and 12.
The thiazole derivatives were evaluated for their antimicrobial and antioxidant activities.
According to the results, thiazoles revealed marked potency as antimicrobial and antioxidant agents. Thus, 7a's DPPH radical scavenging activity was excellent (38.19±0.33 and 14.37±0.4) at concentrations of 2.0 and 1.0 mg/mL, respectively. In addition, compound 3 exhibited activity against all bacterial strains tested, as evidenced by inhibition zones measuring that ranged from 8.5±0.43 mm for E. faecalis to 16.5±0.43 mm for S. mutans.
The MIC results showed that compound 3 was effective against E. coli, S. aureus, E. faecalis, P. aeruginosa, and S. mutans at concentrations of 1.0, 1.0, 2.0, 1.0, and 1.0 mg/mL, respectively. Furthermore, molecular docking has shown lower binding energy with different types of interactions at the active sites of Dihydropteroate synthase, Sortase A, LasR, and penicillin-binding protein pockets, indicating that these compounds could inhibit the enzyme and cause promising antimicrobial effects.
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