Piperazine → HCID 18001227, compound

Participants

Reaction Steps

To a solution of 3-bromo-1-tosylindole (105 mg, 0.3 mmol) and anhydrous piperazine (258 mg, 3.0 mmol) in toluene (4.5 mL) was added palladium acetate (13.4 mg, 0.055 mmol), BINAP (40.3 mg, 0.065 mmol), and cesium carbonate (318 mmol, 0.9 mmol), and the resulting mixture was refluxed for 6 hours. The reaction solution was cooled to room temperature and the precipitated salt was separated by filtration, and the filtrate was concentrated to afford a crude product. The crude product was purified by column chromatography on a silica gel (eluent; ammonia-saturated chloroform) to afford the title compound (69 mg, yield: 65%) as a colorless viscous oil.

Provenance & Evidence