Methanol → tert-Butyl 5-bromo-1-oxoisoindoline-2-carboxylate

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Reaction Conditions

Reaction Steps

Under nitrogen atmosphere, 70 mg of 5-bromo-1-oxo-isoindoline was dissolved in 2 ml of tetrahydrofuran, cooled down to 0° C., and then 4 mg of N,N-dimethylaminopyridine and 144 mg of di-tert-butylcarbonate were added. The mixture was stirred at room temperature for 30 min. Methanol was added to the reaction solution, and the solvents were distilled outunder reduced pressure. Water was added to the residues, extracted with ethyl acetate. Ethyl acetate layer was washed with saturated saline solution, and dried with anhydrous sodium sulfate. After distilling out the solvents under reduced pressure, the residues were separated and purified by silicagel column chromatography (ethyl acetate/hexane=1/2), to obtain 51.2 mg of the above compound as a white solid.

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