HCID 10017173, compound → HCID 10315149, compound

Participants

Reaction Steps

A solution of 1-acetyl-4-[3-(4-fluorobenzoyl)propyl]piperidine (1.7 g) in concentrated hydrochloric acid (15 ml) was refluxed for 16 hours and the hydrochloric acid was then distilled off under reduced pressure. The residue was dissolved in water and the solution was made weakly basic (pH ca.8) with 5% aqueous sodium hydroxide solution and extracted with dichloromethane. The extract was washed with water and dried over anhydrous sodium sulfate and the solvent was distilled off to recover 1.3 g of residue. To a solution of this residue (1.3 g) in ethanol (10 ml) was added 0.94 g of potassium carbonate and 0.9 g of benzyl bromide was added dropwise with ice-cooling. The mixture was stirred at room temperature for 2 hours and then filtered and the filtrate was concentrated under reduced pressure. The residue was diluted with water and extracted with dichloromethane and the extract was washed with water and dried over anhydrous sodium sulfate. Finally the solvent was distilled off to give 1.6 g of 1-benzyl-4-[3-(4-fluorobenzoyl)propyl]piperidine melting at 53°-55° C.

Provenance & Evidence