A new set of ciprofloxacin (CPFX)-isatin-1H-1,2,3-triazole hybrids 6a-l with greater lipophilicity compared with the parent CPFX was designed, synthesized, and assessed for their invitro anti-mycobacterial activity against Mycobacterium tuberculosis (MTB) H(37)Rv as well as cytotoxicity in VERO cell line. The preliminary results showed that all hybrids (MIC: 0.39-50g/mL) exhibited promising activities against MTB H(37)Rv, and six of them (MIC: 0.39-1.56g/mL) were more active than the parent CPFX (MIC: 3.12g/mL). In particular, the most active conjugate 6h (MIC: 0.39g/mL) was comparable with RIF (MIC: 0.39g/mL), and eight times more potent than CPFX. All conjugates (CC50: 4-64g/mL) were more toxic than the parent (CC50: 128g/mL) in VERO cell lines, and the most active hybrids, which also displayed the highest cytotoxicity, should be further optimized.
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