反应详情

温度

40 °C

4-[4-(4-Methoxy-benzyloxy)-phenyl]-cyclohexanol (2.24 mmol, 700.00 mg) and 18-crown-6 (2.69 mmol, 710.70 mg) in tetrahydrofuran (10 mL) is treated with tert-butyl alcohol, potassium derivative (2.69 mmol, 2.69 mL; 1M in THF). The mixture is stirred for 30 minutes and 4-bromomethyl-5-cyclopropyl-3-(2,6-dichloro-phenyl)-isoxazole (3.36 mmol, 1.17 g) is added. The mixture is stirred at room temperature for 5 minutes and heated to 40° C. for 1.5 h. Silica gel is added and the reaction mixture is concentrated under reduced pressure. The crude mixture is purified by silica gel flash chromatography eluting with a gradient of 10-60% EtOAc in hexanes. A second chromatography is performed on silica gel eluting with 0.5% EtOAc in DCM to yield the title compound (960 mg, 74%). MS m/z 577.9 (M+1).

1. stirringThe mixture is stirred at room temperature for 5 minutes
2. additionSilica gel is added
3. concentrationthe reaction mixture is concentrated under reduced pressure
4. customThe crude mixture is purified by silica gel flash chromatography
5. washeluting with a gradient of 10-60% EtOAc in hexanes