反应详情

To a cooled solution of 8.9 (0.56 g, 1.93 mmol) in dry DCM (3.60 mL, 1.93 mmol) at 0° C., was added thionyl chloride (0.40 mL, 5.48 mmol) dropwise. Upon complete addition of thionyl chloride, the mixture was allowed to warm to room temperature. After 18 hours, the reaction was concentrated in vacuo. The residue was then purified by flash chromatography (SiO2 gel 60, eluted with 0%-15% EtOAc in hexanes). Fractions containing the desired product were combined and concentrated to provide 8.10 as a colorless solid (0.44 g, 74%). 1H NMR (500 MHz, CDCl3) δ ppm 7.56 (1H, s), 7.25 (5H, dd, J=7.7, 1.6 Hz), 7.01 (2H, m), 6.86 (1H, dd, J=9.0, 3.2 Hz), 6.77 (1H, dd, J=5.9, 3.2 Hz), 4.65 (3H, s), 3.79 (3H, s), 1.24 (9H, s).

1. concentrationthe reaction was concentrated in vacuo
2. customThe residue was then purified by flash chromatography (SiO2 gel 60, eluted with 0%-15% EtOAc in hexanes)
3. additionFractions containing the desired product
4. concentrationconcentrated