Synthesis of Long Chain Substituted 2-Imino-4-Thiazolidinones and 2, 4-Thiazolidinediones

The α-bromo palmitic, stearic and behenic acids on condensation with thiourea in the presence of anhydrous sodium acetate yielded 5-substituted-2-imino-4-thiazolidinones in 80%. Acid hydrolysis of 5-substituted-2-imino-4-thiazolidinones afforded the 5-substituted-2, 4-thiazolidinediones in 75% yield. Structures of these compounds have been established with the help of combustion, IR, NMR and MS spectral studies.