反应详情

温度

50 °C

To a solution of the title compound of Step A (265 mg, 1.09 mmol) in THF (4 mL) was added 2 M NaOH (2 mL). The mixture was heated at 50° C. for 72 h. The reaction mixture was cooled to room temperature and concentrated in vacuo to remove THF. Then, 1 M HCl(aq) was added and the aqueous was extracted with 10:1 DCM/2,2,2-trifluoroethanol (3×). The combined organic layers were dried over Na2SO4, filtered and concentrated to give intermediate A-24, which was used without further purification in subsequent steps. MS (ESI) mass calcd. for C12H10N2O3, 230.1. m/z found 231.1 [M+H]+. 1H NMR (500 MHz, DMSO-d6) δ 12.63 (s, 1H), 8.86 (d, J=4.9 Hz, 2H), 7.77 (dd, J=7.9, 1.0 Hz, 1H), 7.51 (t, J=8.1 Hz, 1H), 7.45 (t, J=4.9 Hz, 1H), 7.25 (dd, J=8.4, 1.0 Hz, 1H), 3.83 (s, 3H).

1. temperatureThe reaction mixture was cooled to room temperature
2. concentrationconcentrated in vacuo
3. customto remove THF
4. additionThen, 1 M HCl(aq) was added
5. extractionthe aqueous was extracted with 10:1 DCM/2,2,2-trifluoroethanol (3×)
6. dry with materialThe combined organic layers were dried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated
9. customto give intermediate A-24, which
10. customwas used without further purification in subsequent steps