NEW PYRIDINE AND TRIAZOLOPYRIDINE DERIVATIVES: SYNTHESIS, ANTIMICROBIAL AND ANTIOXIDANT EVALUATION.

A novel series of pyridine and triazolopyridine derivatives have been synthesized (1-17) and characterized on the basis of their elemental analyses and spectral data. In vitro antibacterial, antifungal and antioxidant evaluation were carried out for most of the new products. Compounds 3, 5b, 6c, 6d and 13 showed promising growth inhibition against Candida albicans and Aspergillus niger comparable to fluconazole as a reference antifungal drug. Furthermore, the derivatives 5d, 6c, 6d and 9 showed higher scavenging activity (99.4, 97.2, 94.8 and 90%) than that of ascorbic acid (86.4%) towards the DPPH radicals.