Piperidine → 5-Carboethoxymethylene-3-[4-(imidazo[1,2-a]pyridin-5-ylthio)butyl]thiazolidine-2,4-dione

Participants

Reaction Steps

To a solution of 3.21 g (10 mmol) of 3-[4-(imidazo[1,2-a]pyridin-5-ylthio)butyl]thiazolidine-2,4-dione and 1.12 g (11 mmol) of ethylglycolic acid in 50 ml of ethanol, 0.01 ml (1.0 mmol) of piperidine was added, followed by refluxing for 16 hours. After the reaction mixture was cooled, the solvent was distilled off. The residue was dissolved in chloroform, washed with saturated aqueous sodium hydrogen carbonate and dried, after which the solvent was distilled off. The residue was purified by column chromatography (eluent, n-hexane/ethyl acetate=1/1→1/4→ethyl acetate) to yield 0.70 g (17.3%, yellow crystal) of the desired product.

Provenance & Evidence