The new compounds 7a–k, 8a–k, and 9a–k were synthesized from flavonones 4–6, which can be considered new precursors for quinoline synthesis through a one-step reaction. All the target compounds (7a–k, 8a–k, and 9a–k) were evaluated for their in vitro antimicrobial activity against nine test microorganisms. They showed the most activity against Mycobacterium smegmatis with minimum inhibitory concentrations (MIC) of –500 µg/mL, indicating their potential uses as antituberculosis agents. Among them 8a–k (m-fluoride) were the most active compounds against M. smegmatis (MIC, –125 µg/mL). |