Methanol → 3-Ethynyl-2,4-difluoro-1,5-dimethoxybenzene

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Reaction Steps

To a stirred solution of [(2,6-difluoro-3,5-dimethoxyphenyl)ethynyl](trimethyl)-silane (630 mg, 2.33 mmol) in tetrahydrofuran (2 mL)/methanol (2 mL), cesium fluoride (354 mg, 2.33 mmol) was added at room temperature. After 1 hour, the reaction was quenched with saturated aq. NH4Cl, then extracted with methylene chloride. The combined organic layers were dried over MgSO4, concentrated to give the desired product (440 mg, 95%). 1H NMR (300 MHz, CDCl3): δ 6.62 (t, J=7.8 Hz, 1H), 3.89 (s, 7H) ppm.

Provenance & Evidence