反应详情

Ethyl 3-(2-fluoro-4-methoxyphenyl)propanoate (1480 mg, 6.54 mmol) was dissolved in ethanol (60 mL). Iodine (1660 mg, 6.54 mmol) and silver sulfate (2040 mg, 6.54 mmol) were added and the reaction was stirred vigorously at room temperature, protected from light, for 1 hr. The reaction was then diluted with ethyl acetate (100 mL) and filtered. The filtrate was washed with sodium bisulfite (2×60 mL), water (70 mL), and brine (70 mL). The organic layer was dried over sodium sulfate, filtered, and concentrated. The residue was purified by flash chromatography on silica gel with 0 to 50% ethyl acetate/hexanes to afford ethyl 3-(2-fluoro-5-iodo-4-methoxyphenyl)propanoate. 1H NMR (CDCl3, 500 MHz) δ 7.59 (d, J=8.4 Hz, 1H), 6.55 (d, J=11.6 Hz, 1H), 4.13 (q, J=7.1 Hz, 2H), 3.84 (s, 3H), 2.87 (t, J=7.6 Hz, 2H), 2.57 (t, J=7.6 Hz, 2H), 1.24 (t, J=7.1 Hz, 3H).

1. customfor 1 hr
2. filtrationfiltered
3. washThe filtrate was washed with sodium bisulfite (2×60 mL), water (70 mL), and brine (70 mL)
4. dry with materialThe organic layer was dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by flash chromatography on silica gel with 0 to 50% ethyl acetate/hexanes