Azolidinediones and their various derivatives exhibit high physiological activity and are widely used in pharmacology [1]. In addition, they can be used as ligands for the synthesis of some transition metal complexes which catalyze formation of oxiranes from alkenes [2]. In continuation of our studies in the field of synthesis and application of azolidinediones, we synthesized thiazolidinediones by three-component condensations of various aldehydes ...