“…117 However, 4-thiazolidinones on treatment with 30% H202 in a mixture of cold acetic acid and acetic anhydride give the 4-thiazolidinone S-monooxide deriva-tives210 (202). 2-(Arylimino)-3-substituted-4-thiazolidinones and 2,3-disubstituted-4-thiazolidinones are oxidized to the corresponding 1,1-dioxides (203,204) on treatment with KMn04 in glacial acetic acid at 0 °C.39,52,53,119…”