Potassium Carbonate → HCID 18980218, compound

Participants

Reaction Steps

A mixture of 1-(6-fluorobenzo[b]thien-3-yl)-piperazine (20.0 g, 84.6 mmol), N-(4-bromobutyl)phthalimide (26.3 g, 93.2 mmol), anhydrous potassium carbonate (17.5 g, 127 mmol), KI (1.40 g, 8.43 mmol), and anhydrous acetonitrile (500 mL) was stirred at reflux for 17 hours. The thick slurry was filtered, the insolubles washed with chloroform (2×100 mL), and the filtrate concentrated in vacuo. The residue was taken up in chloroform (400 mL), washed with water (200 mL), and dried (MgSO4). The solvent was removed in vacuo and the product chromatographed on silica gel, with 20% heptane/ethyl acetate as eluent, to afford 25.8 g of a yellow solid. Recrystallization from ether afforded 10.9 g (29%) of the title compound as a yellow powder: m.p.=94°-95° C.

Provenance & Evidence