1H-1,2,3-Triazole-Tethered Isatin–Ferrocene and Isatin–Ferrocenylchalcone Conjugates: Synthesis and in Vitro Antitubercular Evaluation
摘要:
A Cu-mediated azide-alkyne cycloaddition protocol has been employed for the synthesis of 16 different triazoles to probe the antitubercular structure activity relationships within the isatin-ferrocene-triazole conjugate family. The antitubercular evaluation studies revealed a marked improvement in activity with the introduction of ferrocene nucleus among precursors N-alkylazido isatins with a prefernce for halogen (F, Cl) substituent at C-S position of isatin as well as propyl chain length as a spacer. The induction of a chalcone nucleus resulted in the enhanced antimycobacterial efficacy irrespective of the subtituent and alkyl chain length as evidenced by the isatin-ferrocenylchalcone hybrids. The described protocol is the first successful attempt of the amalgamation of ferrocene isatin nuclei tethered via a triazole linker.