Cesium carbonate → HCID 21069896, compound

Participants

Reaction Conditions

Reaction Steps

A 48 mL pressure vessel containing 2-bromo-4-fluorobenzonitrile (1.00 g, 5.00 mmol), 2-pyrrolidinone (0.46 mL, 6.00 mmol), Cs2CO3 (2.28 g, 7.0 mmol) and 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (xantphos) (0.231 g, 0.40 mmol) in dioxane (6 mL) was degassed with argon for 15 min. Pd2 dba3 was introduced and the reaction mixture heated at 105° C. for 48 h. The mixture was cooled, diluted with ethyl acetate or dioxane, and then filtered through Celite. The resulting mixture was concentrated in vacuo and subjected to column chromatography on silica gel with hexanes:ethyl acetate (3:7) gradient as the eluent to afford the title compound as a white solid (0.887 g, 87% yield): 1H NMR (400 MHz, CDCl3) δ ppm: 7.69 (1H, dd, J=5.8, 8.6 Hz), 7.22 (1H, dd, J=2.5, 9.6 Hz), 7.07 (1H, ddd, J=2.5, 7.6, 8.6 Hz), 3.96 (2H, t, J=7.0 Hz), 2.62 (2H, t, J=8.1 Hz), 2.30-2.22 (2H, m); LCMS (+ESI, M+H+) m/z 205.

Provenance & Evidence