反应详情

To a mixture of 3-tert-butyl-5-(2-phenylethyl)-1H-pyrazole (1.57 g, 6.87 mmol), sodium hydride (60% in oil, 280 mg, 7 mmol), and N,N-dimethylformamide (15 mL) was added methyl 4-(bromomethyl)benzoate (2.29 g, 10.0 mmol) at room temperature, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was poured into 1 M hydrochloric acid, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (5%-40% ethyl acetate/hexane) to give the title compound (1.75 g, yield 68%) as a yellow oil.

1. extractionthe mixture was extracted with ethyl acetate
2. dry with materialThe ethyl acetate layer was dried over anhydrous magnesium sulfate
3. concentrationconcentrated under reduced pressure
4. customThe residue was purified by silica gel column chromatography (5%-40% ethyl acetate/hexane)