反应详情

To a suspension of 404 (221 mg, 0.365 mmol) in DCM (5 mL) was added TFA (1 mL) and the reaction mixture was stirred for 4 h then concentrated, diluted with water and 1M NaOH to pH 11. The solid was collected by filtration, rinsed with water and dried. The residue was purified by Biotage (SNAP 25 g cartridge; 2% of ammonium hydroxide in MeOH/DCM: 10/90 to 30/70), to afford the title compound 405 (155 mg, 84% yield) as a beige solid. 1H NMR (400 MHz, DMSO-d6) δ (ppm): 8.77 (s, 1H), 8.55 (brd, J=1.6 Hz, 1H), 8.52 (d, J=5.6 Hz, 1H), 8.35 (s, 1H), 8.27 (d, J=7.2 Hz, 1H), 7.91 (dd, J=8.0, 2.4 Hz, 1H), 7.73 (dd, J=13.6, 2.4 Hz, 1H), 7.38 (t, J=9.0 Hz, 1H), 7.24-7.18 (m, 1H), 6.65 (d, J=5.2 Hz, 1H), 6.62 (brd, J=2.8 Hz, 1H), 4.48 (s, 2H), 4.40-4.41 (m, 1H), 3.56-3.49 (m, 2H), 3.47-3.50 (m, 2H), 2.58-2.51 (m, 1H), 0.68-0.62 (m, 2H), 0.47-0.41 (m, 2H). MS (m/z): 506.14 (M+H).

1. concentrationthen concentrated
2. additiondiluted with water and 1M NaOH to pH 11
3. filtrationThe solid was collected by filtration
4. washrinsed with water
5. customdried
6. customThe residue was purified by Biotage (SNAP 25 g cartridge; 2% of ammonium hydroxide in MeOH/DCM: 10/90 to 30/70)