Synthesis and Docking Study of Novel 4-Thiazolidinone Derivatives as Anti-Gram-positive and Anti-H. pylori Agents.

BACKGROUND: Bacterial resistance to the available antibiotics is a life threatening issue and researchers are trying to find new drugs to overcome this problem. Amongst the different structural classes, thiazolidinone-4-one as a new effective pharmacophore against various bacteria has been introduced.

OBJECTIVE: A new series of 2-(5-(5-nitrothiophene-2-yl)-1,3,4-thiadiazole-2-ylimino)-5-arylidenethiazolidin-4-one derivatives were designed and synthesized as new antibacterial agents.

METHOD: Target compounds were synthesized during 5 steps and their in vitro antibacterial and anti-H. pylori activities were evaluated. The interaction of the most active derivatives with the probable targets was assessed by Auto Dock 4.2 Program.

RESULTS: The results showed that the most potent compounds, 18, 22 and 23, displayed antibacterial activity versus S.aureus, S.epidermidis, B.cereus and B.subtilis (MIC, 1.56- 12.5 μg/mL) and none of the derivatives were active on tested Gram-negative bacteria. Compound 12 in all considered doses and compounds 10, and 27 had strong anti-H. pylori activity (inhibition zone >20 mm) in 25 μg disc. Docking studies determined suitable interactions and affinity of potent compounds with bacterial MUR B and H. pylori urease enzymes.

CONCLUSION: According to the results most of the derivatives are effective anti-bacterial agents and docking evaluation confirmed their possible mechanisms of actions as Mur B and Urease inhibitors.