反应详情

To a solution of 7-((1-allylcyclopropyl)sulfonyl)-4-fluoro-5-(2-fluoro-4-iodophenyl)-5H-imidazo[4′,5′:4,5]benzo[1,2-d]oxazol-6(7H)-one (120 mg, 0.23 mmol) in THF (10 mL) was added potassium trimethylsilanolate (48 mg, 0.35 mmol). The reaction was stirred at room temperature for 1 h and quenched with saturated NH4Cl (aq.). The aqueous layer was extracted with EA (10 mL×2). The combined organic phase was washed with brine (10 mL), dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (petroleum ether/ethyl acetate, 5:1-3:1, v/v) to give the desired product (100 mg, 87.0% yield). 1H NMR (400 MHz, CDCl3): δ 8.09 (s, 1H), 7.99 (s, 1H), 7.42 (m, 1H), 7.31-7.25 (m, 1H), 6.80 (s, 1H), 6.43-6.35 (m, 1H), 6.21 (s, 1H), 5.85-5.70 (m, 1H), 5.22-5.14 (m, 2H), 2.83 (d, 2H), 1.28-1.20 (m, 2H), 0.87-0.80 (m, 2H).

1. customquenched with saturated NH4Cl (aq.)
2. extractionThe aqueous layer was extracted with EA (10 mL×2)
3. washThe combined organic phase was washed with brine (10 mL)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by flash chromatography on silica gel (petroleum ether/ethyl acetate, 5:1-3:1