反应详情

To a solution of compound 4-fluoro-5-((2-fluoro-4-iodophenyl)amino)-N-(2-(vinyloxy)ethoxy)benzo[d]oxazole-6-carboxamide (598 mg, 1.17 mmol) in CH2Cl2 (5 mL) was added 1.0 N HCl (aq., 6.7 mL, 6.72 mmol) dropwise. After stirring for 1 h, the reaction mixture was treated with saturated NaHCO3 (aq.). The organic layer was washed with water (30 mL×2) and brine (30 mL), dried over Na2SO4, filtered and concentrated in vacuo. The crude product was purified by column chromatography on silica gel (CH2Cl2/MeOH, 15:1, v/v) and gave the desired product (white solid, 290 mg, 52% yield). 1H NMR (400 MHz, DMSO-d6): δ 11.75 (s, 1H), 8.96 (s, 1H), 8.01 (s, 1H), 7.88 (s, 1H), 7.53 (d, J=9.4 Hz, 1H), 7.28 (d, J=8.7 Hz, 1H), 6.39 (m, 1H), 4.70 (s, 1H), 3.83 (m, 2H), 3.56 (m, 2H). MS (ES+): m/z 476.34 [MH+].

1. washThe organic layer was washed with water (30 mL×2) and brine (30 mL)
2. dry with materialdried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe crude product was purified by column chromatography on silica gel (CH2Cl2/MeOH, 15:1