Potassium Carbonate → 1-[4-(4-Benzyl-piperazin-1-yl)-2-hydroxy-5-methoxy-phenyl]ethanone

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-(2-Benzyloxy-4-fluoro-5-methoxy-phenyl)-ethanone (4.25 g, 15.5 mmol) in 3 mL DMF was added 1-benzyl-piperazine (5.4 mo, 30.9 mmol) and potassium carbonate (4.28 g, 30.9 mmol). The reaction mixture was heated under nitrogen to 130-140° C. for 18 hours. The reaction mixture was cooled to room temperature, poured into ice water, and extracted with EtOAc. The combined organic layers were washed with brine, dried (MgSO4), filtered, and evaporated under reduced pressure. The resulting residue was purified by flash chromatography on silica gel (hexanes:ethyl acetate 8.5:1.5) to yield 4.5 g (73%) of 1-[4-(4-Benzyl-piperazin-1-yl)-2-hydroxy-5-methoxy-phenyl]ethanone as a solid. MP=90-92° C.

Provenance & Evidence