1-Bromo-2-Chloroethane → HCID 86694105, compound

Participants

Reaction Conditions

Reaction Steps

Sodium hydride (60% in oil, 0.620 g, 15.5 mmol) was washed with hexanes (2×10 mL) under nitrogen. Dry dimethylformamide (5 mL) was added and the suspension cooled in an acetone/ice bath. A solution of 2-(2-chloro-5-fluoropyridin-3-yl)acetonitrile (0.571 g, 3.35 mmol) in dry dimethylformamide (10 mL) was added slowly and the reaction stirred for minutes. 1-Bromo-2-chloroethane (0.300 ml, 3.60 mmol) was added. After stirring in the cold bath for 5 minutes, the orange mixture was removed from the cold bath and heated at 50° C. After 45 minutes the mixture was cooled and carefully quenched by addition of saturated ammonium chloride (10 mL) then partitioned between 10% saturated ammonium chloride (200 mL) and ethyl acetate (300 mL). The organic was dried with magnesium sulfate and evaporated to dryness under reduced pressure. The crude product was purified using silica chromatography (hexane to ethyl acetate gradient) to give the desired 1-(2-chloro-5-fluoropyridin-3-yl)cyclopropanecarbonitrile (0.400 g, 2.034 mmol, 60.8% yield).

Provenance & Evidence