A mixture of 280 (210 mg, 0.97 mmol), 2-fluoro-4-nitrophenol (278 mg, 1.77 mmol) and K2CO3 (560 mg, 3.54 mmol) in Ph2O (10 mL) was heated at 130° C. 60 hours, cooled to room temperature and partitioned between EtOAc and water. Organic phase was collected, dried over anhydrous Na2SO4, filtered, concentrated and purified by flash column chromatography with a gradient elution (hexane to hexane/EtOAc, 1:1) to afford the title compound 281 (288 mg, 88% yield) as a yellowish solid. MS (m/z): 338.1(M+H) (found).
