Click Synthesis, Antimicrobial, DNA Photocleavage and Computational Studies of Oxindole-Tethered 1 H -1,2,3-triazoles

Aim: To obtain new hybrids derived from isatin and triazole. Materials & methods: A series of oxindole–1-H-1,2,3-triazole hybrids (4a–l) were synthesized from 3-sulfenylated N-propargylated oxindoles and organic azides employing Cu(I)-catalyzed azide–alkyne cycloaddition. These compounds were evaluated in vitro for antimicrobial activity by the standard serial dilution method and DNA photocleavage activity. Results: Antimicrobial assay revealed that compounds 4l and 4f exhibited promising efficacy against Candida albicans and Rhizopus oryzae, respectively, with a minimum inhibitory concentration (MIC) value of 0.0008 μmol/mL. Compounds 4h and 4k completely degraded plasmid DNA. Further molecular docking of compounds with 1KZN (4j and 4k) and 5TZ1 (4h and 4l) revealed good binding interactions. Conclusion: Results of the current research can help in the development of new antimicrobial agents with high efficacy.