To a stirred solution of 0.53 g of 1-(3-tert-butyl-5-(6-hydroxynaphthalen-2-yl)-4-methoxyphenyl)pyrimidine-2,4(1H,3H)-dione (1.27 mmol, 1.0 equivalent) in 5 mL of N,N-dimethylformamide was added 0.35 g of 325-mesh potassium carbonate (2.6 mmol, 2.0 equivalents). Perfluoro(2-ethoxyethane)sulfonyl fluoride (0.46 g, 1.4 mmol, 1.1 equivalents) was added in one portion, and the mixture was stirred for an hour. The inorganic solids were separated by filtration, and the flask and filter cake were rinsed with 1 mL of N,N-dimethylformamide followed by 2 mL of ethyl acetate. The solution was diluted with 30 mL of ethyl acetate and the resultant solution was washed twice with 20 mL portions of 10 wt % aqueous sodium chloride, followed by 20 mL of saturated aqueous sodium chloride solution. The washing procedure was repeated once. The organic solution was dried over sodium sulfate, the drying agent was filtered off and the organic solution was concentrated in vacuo. The resultant solid was purified by chromatography over silica gel with gradient elution (30% ethyl acetate/hexanes to 60% ethyl acetate/hexanes). The title compound was isolated as a white solid (0.76 g, 84% yield). 1H NMR (400 MHz, CDCl3) δ ppm 8.54 (d, J=1.7 Hz, 1H), 8.04 (s, 1H), 7.95 (d, J=9.4 Hz, 1H), 7.92 (d, J=10.1 Hz, 1H), 7.83 (dd, J=8.5, 1.7 Hz, 1H), 7.78 (d, J=2.4 Hz, 1H), 7.40 (dd, J=9.0, 2.5 Hz, 1H), 7.36 (d, J=7.9 Hz, 1H), 7.27-7.23 (m, 2H), 5.81 (dd, J=7.9, 2.4 Hz, 1H), 3.29 (s, 3H), 1.46 (s, 9H). 13C NMR (101 MHz, CDCl3) δ ppm 162.6 (C), 157.5 (C), 149.8 (C), 147.1 (C), 145.0 (C), 144.5 (CH), 137.2 (C), 135.1 (C), 133.0 (C), 132.2 (C), 132.2 (C), 130.5 (CH), 128.5 (CH), 128.1 (CH), 127.4 (CH), 127.2 (CH), 124.4 (CH), 119.9 (CH), 118.9 (CH), 102.4 (CH), 60.9 (CH3), 35.8 (C), 30.8 (CH3). 19F NMR (564 MHz, CDCl3) δ ppm −81.61 (2F), −86.42 (3F), −88.11 (2F), −112.90 (2F). LC-MS m/z 715.0 [M+H]+.
