Thiazolidinedione → 4-(2,4-Dioxo-thiazolidin-5-ylidenemethyl)-benzoic acid methyl ester

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Reaction Steps

A solution of 4-formyl-benzoic acid methyl ester (1.0 g, 6.7 mmol), thiazolidine-2,4 dione (0.78 g, 6.7 mmol) and piperidine (0.66 ml, 6.7 mmol) in 2-methoxy-ethanol (20 ml) was refluxed for 2 hrs, cooled to the room temperature and evaporated. The residue was triturated with CH2Cl2 to produce a crystalline material which was collected by filtration to afford the title compound (620 mg, 35% yield). LRMS: 263.3 (calcd.), 264.1 [MH]+ (found).

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