反应详情

To a solution of 5-amino-1-(4-fluorophenyl)-4-[3-(2-tert-butyldimethylsiloxyethyl)-benzoyl]pyrazole (1.2 g, 3.0 mmol) in tetrahydrofuran (25 ml) was added tetrabutylammonium fluoride (3.6 ml, 3.6 mmol, 1 M solution in tetrahydrofuran). After 1 h, the reaction mixture was poured into brine and the product was extracted into ethyl acetate. The organic layer was dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash chromatography (elution gradient: 40-100% ethyl acetate/hexane) to give 5-amino-1-(4-fluorophenyl)-4-[3-(2-hydroxyethyl)benzoyl]pyrazole (0.8 g).

1. extractionthe product was extracted into ethyl acetate
2. dry with materialThe organic layer was dried over sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe residue was purified by flash chromatography (elution gradient: 40-100% ethyl acetate/hexane)