Abstract
Abstract5‐Arylidene‐2‐thiazolidinone‐4‐thiones 1 undergo Michael type reactions with Ω‐nitrostyrene, α,β‐unsaturated ketones and N‐arylmaleimides to give the corresponding 7‐aryl‐tetrahydro‐7H‐thiopyrano[2,3‐d]thiazole‐2‐one derivatives 3 and 4. Arylmagnesium bromides add to the lateral double bond of 5‐arylidene‐3‐phenyl‐2‐thiazolidinone‐4‐thiones 5 to yield products 6. With phenyl‐hydrazine at room temperature, 1 or 5 yield the corresponding aldehyde phenylhydrazones and 4‐phenyl‐hydrazono‐2‐thiazolidinone or its 3‐phenyl derivative. The thione group in 5‐diaryl‐methyl‐2‐thiazolidinone‐4‐thiones condenses with phenylhydrazine to yield 5‐diarylmethyl‐4‐phenyl‐hydrazono‐2‐thiazolidinones 9.
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