Propanal → N-[8-Bromo-6-methyl-2-(methylsulfanyl)imidazo[1,2-a]pyridin-3-yl]-N,N-dipropylamine

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Reaction Steps

N-[8-Bromo-6-methyl-2-(methylsulfanyl)imidazo[1,2-a]pyridin-3-yl]-N-propylamine (103 mg) and propionaldehyde (57 mg) were dissolved in tetrahydrofuran (1.2 mL), then 3M sulfuric acid (0.24 mL) was added thereto, follwed by adding sodium borohydride (24 mg) under ice-cooling, and then the mixture was stirred for 3 hours. Water was added to the reaction mixture, which was neutralized with a 2N aqueous sodium hydroxide solution and extracted with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate and evaporated. The resulting residue was purified by silica gel column chromatography (ethyl acetate:n-hexane=1:9) to give the title compound (79 mg) as a white powder.

Provenance & Evidence