2,2,2,4'-Tetrafluoroacetophenone → HCID 66583043, compound

Participants

Reaction Conditions

Reaction Steps

2,2,2-trifluoro-1-(4-fluorophenyl)ethanone (2.6 g, 13 mmol, Sigma-Aldrich, St. Louis, Mo.), Hünig's base (5.8 mL, 34 mmol), 1-(2-thiophenylsulfonyl)piperazine hydrochloride (3.0 g, 11 mmol, Example 29, step 1), and acetonitrile (22 mL) was added to a high-pressure reaction vessel. The vessel was sealed and heated at 110° C. for 19 h. After cooling to room temperature, the mixture was partitioned between EtOAc (100 mL) and saturated aqueous sodium bicarbonate (50 mL) and the layers were separated. The organic material was washed sequentially with saturated aqueous sodium bicarbonate (50 mL) and brine (50 mL), dried (Na2SO4) and filtered. The filtrate was concentrated, hexanes (100 mL) was added to the residue and the slurry was filtered to give 2,2,2-trifluoro-1-(4-(4-(2-thiophenylsulfonyl)-1-piperazinyl)phenyl)ethanone (2.5 g) as a light tan solid. The material was used in the next step without purification

Provenance & Evidence