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To 118C (244 mg, 0.87 mmol) in DMF (2.0 mL) was added potassium fluoride (100 mg) and iodoethane (0.13 mL). The mixture was stirred at rt overnight. It was diluted with EtOAc and the organic extracts were washed with brine and dried. The crude product was purified by column chromatography to give 118D (158 mg, 100% yield) as an oil. 1H NMR (400 MHz, CDCl3) δ ppm 1.22 (t, J=7.69 Hz, 3H) 1.46 (t, J=7.03 Hz, 3H) 2.62 (q, J=7.47 Hz, 2H) 4.13 (q, J=7.03 Hz, 2H) 7.02 (dd, J=7.91, 2.20 Hz, 1H) 7.22 (dd, J=5.27, 2.20 Hz, 1H) 10.35 (s, 1H).

1. washthe organic extracts were washed with brine
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3. customThe crude product was purified by column chromatography