ABSTRACT
<p><b>AIM</b>Studies on synthesis and antibacterial activity of new heterocycles.</p><p><b>METHODS</b>The cyclocondensation of [(3-pyridyl)-1,3,4-oxadiazol-2-yl] thio acetic acid with various aroyl hydrazines in the presence of POCl3 and xylene gave the corresponding titled compounds, and the in vitro antibacterial activity was primarily evaluated by the method of cupplate diffusion solution.</p><p><b>RESULTS</b>Sixteen novel titled compounds were synthesized, their structures were confirmed by IR, 1HNMR, MS and elemental analysis. Biological screening results demonstrated that most of the compounds prepared displayed potential antibacterial activity.</p><p><b>CONCLUSION</b>Oxadiazoles incorporting pyridyl oxadiazole ring may be usefully antibacterial candidate drugs.</p>