Synthesis, antibacterial, antifungal and anti-HIV evaluation of Schiff and Mannich bases of isatin and its derivatives with triazole |
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Authors: | Pandeya S N Sriram D Nath G de Clercq E |
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Affiliation: | Department of Pharmaceutics, Banaras Hindu University, Varanasi, India. snpande@banaras.ernet.in |
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Abstract: | Isatin (indole 2,3-dione) and its 5-chloro and 5-bromo derivatives have been reacted with 3-(4'-pyridyl)-4-amino-5-mercapto-4-(H)-1,2,4-triazole to form Schiff bases and the N-Mannich bases of these compounds were synthesised by reacting them with formaldehyde and several secondary amines. Their chemical structures have been confirmed by means of their IR, 1H-NMR data and by elemental analysis. Investigation of antimicrobial activity of compounds was done by agar dilution method against 27 pathogenic bacteria, 8 pathogenic fungi and anti-HIV activity against replication of HIV-1 (III B) in MT-4 cells. Among the compounds tested 1-(piperidinomethyl) 5-bromo 3-[3'-(4"-pyridyl)-5'-mercapto-4'-(H)-1',2',4'-triazol 4'-yl]imino isatin showed the most favourable antimicrobial activity. |
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