SYNTHESIS AND BIOLOGICAL ACTIVITIES OF SOME INDOLE ANALOGUES CONTAINING TRIAZOLE-5-THIOL AND THIAZOLOTRIAZOLE SYSTEMS

Objective: The present study aims at the synthesis and evaluation of antimicrobial and antioxidant activities of indole analogues incorporated with triazole and thiazolotriazole moieties. Methods: The newly synthesized compounds were screened for their antimicrobial activity by cup-plate method. Antioxidant activity by three different methods viz.,1,1-diphenyl-2-picryl hydrazil (DPPH) radical scavenging activity (RSA), ferric ion (Fe3+) reducing power (FRAP) and ferrous (Fe2+) ion metal chelating activity were appraised by calorimetric method using UV-Visible spectrophotometer. Results: The structures of all the newly synthesized compounds have been established on the basis of their IR, 1HNMR, [13]CNMR and mass spectral studies and elemental analysis. Compound 4a showed good radical scavenging activity (RSA), 4b showed good ferric ion (Fe3+) reducing antioxidant power (FRAP) and compounds 3c and 4a exhibited good ferrous ion metal chelating activity. Whereas compound 3b showed good antibacterial activity against P. aeruginosa, 4a against S. aureus and 4c against E. coli. While for the antifungal activity compound 3a was good against A. oryzae, 3c against A. nizer and 4a against A. flavus. Conclusion: Antimicrobial and antioxidant activity results of the newly synthesized compounds indicate that some of the compounds showed better antimicrobial and antioxidant activities with reference to the standard drugs