p-Fluoronitrobenzene → HCID 14649986, compound

Participants

Reaction Conditions

Reaction Steps

A stirred suspension of sodium hydride (60% in oil, 1.00 g) in 50 ml of dimethylformamide was treated with a solution of 4.0 g of 1-acetyl-4-hydroxy-4-phenylpiperidine in 100 ml of dimethylformamide. The mixture was heated at 70° C. until evolution of gas had ceased. After cooled to ice bath temperature, a solution of 2.96 g of 1-fluoro-4-nitrobenzene in 40 ml of dimethylformamide was added, dropwise, and the reaction allowed to proceed for 20 hours. The reaction mixture was then poured into ice water and the aqueous suspension extracted with ethyl acetate. The organic layer was washed with water, dried over anhydrous magnesium sulfate, filtered, and concentrated to an oil. High pressure liquid chromatography of the oil (silica gel; elution with 20% ethyl acetate/dichloromethane) afforded 4.73 g (77.29%) of 1-acetyl-4-(4-nitrophenoxy)-4-phenylpiperidine, m.p. 145°-150° C.

Provenance & Evidence