反应详情

To a solution of (2-(4-chlorophenyl)-1-(phenylsulfonyl)-1H-imidazol-4-yl)(3,4,5-trimethoxyphenyl)methanone (11fa) (2.0 mmol) in THF (20.0 mL) was added 1.0 M tetrabutyl ammonium fluoride (4.0 mmol) and stirred overnight. The reaction mixture was diluted by 50 mL of saturated NaHCO3 solution (aqueous) and extracted by ethyl acetate (100 mL). The organic layer was dried over magnesium sulfate and concentrated. The residue was purified by flash column chromatography (hexane:ethyl acetate 3:1) or recrystallized from water and methanol to give a white solid. Yield: 80-95%. Yield: 36.9%; mp 193-195° C. 1H NMR (500 MHz, CDCl3) δ 10.75 (br, 1H), 7.96 (d, J=8.5 Hz, 2H), 7.83 (s, 1H), 7.47 (d, J=9.0 Hz, 2H), 7.23 (s, 2H), 3.97 (s, 3H), 3.94 (s, 6H), 2.43 (s, 3H). MS (ESI): calculated for C19H17ClN2O4, 372.1. found 395.1 [M+Na]+, 370.9 [M−H]−. HPLC Gradient: Solvent A (water) and Solvent B (methanol): 0-15 min 40-100% B (linear gradient), 15-25 min 100% B: tR 16.36 min, purity >99%.

1. extractionextracted by ethyl acetate (100 mL)
2. dry with materialThe organic layer was dried over magnesium sulfate
3. concentrationconcentrated
4. customThe residue was purified by flash column chromatography (hexane:ethyl acetate 3:1)
5. customrecrystallized from water and methanol
6. customto give a white solid
7. custom0-15 min 40-100% B (linear gradient), 15-25 min 100% B