Cesium fluoride → 4-(7-(2-Fluoro-4-nitrophenoxy)thieno[3,2-b]pyridin-2-yl)phenol

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-bromo-7-(2-fluoro-4-nitrophenoxy)thieno[3,2-b]pyridine (42, scheme 8) (650 mg, 1.76 mmol) in ethylene glycol dimethyl ether (18 mL) were added 4-hydroxyphenylboronic acid (486 mg, 3.52 mmol), tetrakis-triphenylphosphine palladium(0) (203 mg, 0.18 mmol), cesium fluoride (802 mg, 5.28 mmol) and a solution of sodium bicarbonate (444 mg, 5.28 mmol) in water (1 mL). The reaction mixture was purged with nitrogen, heated at 80° C. for 4 hours, quenched with saturated aqueous ammonium chloride and extracted with EtOAc. The extract was washed with water and brine, dried over anhydrous magnesium sulfate, filtered and evaporated under reduced pressure. The residue was purified by trituration with methanol and ether to afford title compound 153 (418 mg, 62% yield) as a yellow solid. LRMS (M+1) 383.1 (100%).

Provenance & Evidence