反应详情

To a solution of 4-(5-bromopyridin-2-yl)piperidine-4-carbonitrile (1.15 g) in toluene (14.4 ml), was added 2-methyltetrahydrofuran-3-one (526 mg), and then, sodium triacetoxyborohydride (1.37 g), and the mixture was stirred at room temperature for five hours. Water and 1N aqueous solution of sodium hydroxide were added to the reaction solution at 0° C., and extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified with NH silica gel chromatography (n-hexane/ethyl acetate) to give cis-4-(5-bromopyridin-2-yl)-1-(2-methyltetrahydrofuran-3-yl)piperidine-4-carbonitrile (1.05 g) as a yellow solid.

1. extractionextracted with ethyl acetate
2. washThe organic layer was washed with saturated brine
3. dry with materialdried over anhydrous sodium sulfate
4. concentrationconcentrated in vacuo
5. customThe residue was purified with NH silica gel chromatography (n-hexane/ethyl acetate)