Pyridine → (2S)-1-(2-bromoacetyl)pyrrolidine-2-carbonitrile

Beteiligte Stoffe

Reaktionsschritte

To a cold solution (−10° C.) of bromoacetyl bromide (2.0 g, 10.0 mmol) in CH2Cl2 (30 mL), a solution of (S)-pyrrolidine-2-carbonitrile (480 mg, 5.0 mmol) and pyridine (1.4 g, 210 mmol) together with a catalytic amount of DMAP (50 mg) in CH2Cl2 (10 mL) was added over a 30 minute period. After stirring for about 10 minutes, the reaction temperature was gradually increased to room temperature. Stirring at room temperature was continued overnight. The residue was diluted with CH2Cl2 (60 mL), washed with ice water and cold 10% sodium bicarbonate aqueous solution to give crude product (1.01 g; yield of 93%). Column chromatography purification of the crude product resulted in pure 1-(2-bromo-acetyl)-(S)-pyrrolidine-2-carbonitrile (892 mg; 82.6% yield).

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