Ethyl bromoacetate → 8-Bromo-6-methyl-2-(methylsulfanyl)imidazo[1,2-a]pyridin-3-carboxylic acid ethyl ester

Participants

Reaction Conditions

Reaction Steps

Ethyl bromoacetate (5.4 g) was added to methyl N-(3-bromo-5-methyl-2-pyridyl)-(methylsulfanyl)methaneimidothioate, and the mixture was stirred at 60° C. for 4 hours. After cooled to room temperature, triethylamine was added to treat the material, and water was further added thereto. The reaction mixture was extracted with ethyl acetate, dried over anhydrous magnesium sulfate and evaporated. The resulting residue was purified by column chromatography (ethyl acetate:n-hexane=1:9) to give 8-bromo-6-methyl-2-(methylsulfanyl)imidazo[1,2-a]pyridin-3-carboxylic acid ethyl ester (2.4 g) as a white powder.

Provenance & Evidence