反应详情

温度

30 °C

A mixture of 123a (105 mg, 0.15 mmol) and lithium hydroxide (36 mg, 1.5 mmol) in i-propanol/THF (1:1, 4 mL) and water (1 mL) was stirred at 30° C. for 1 h. The mixture was evaporated under reduced pressure and the residue was extracted with ethyl acetate (2×10 mL). The combined ethyl acetate extract was concentrated under reduced pressure and the residue was purified by reverse-phase prep-HPLC to afford 123 (40 mg, 40%) as a pale pink solid. MS: [M+H]+ 682.3. 1H NMR (500 M, CHCl3) δ 8.55 (s, 1H), 7.93 (s, 1H), 7.82 (s, 1H), 7.51 (s, 1H), 7.29 (d, J=3.5 Hz, 1H), 7.15-7.12 (m, 1H), 6.94 (dd, J=3.5 Hz, 10.5, 1H), 6.81 (d, J=10.0 Hz, 1H), 6.30 (s, 1H), 4.77-4.74 (m, 4H), 4.72-4.70 (m, 1H), 4.57-4.55 (m, 1H), 4.29-4.24 (m, 1H), 4.12-4.05 (m, 1H), 3.90-3.78 (m, 4H), 3.70 (s, 3H), 3.52-3.50 (m, 1H), 3.32-3.30 (m, 1H), 3.12-3.10 (m, 2H), 3.04-2.83 (m, 2H), 2.81 (m, 2H), 2.57-2.50 (m, 1H), 2.43-2.33 (m, 2H), 2.05-2.00 (m, 2H), 1.87-1.85 (m, 2H), 1.49-1.35 (m, 2H), 0.81 (t, J=8.5 Hz, 3H).

1. customThe mixture was evaporated under reduced pressure
2. extractionthe residue was extracted with ethyl acetate (2×10 mL)
3. extractionThe combined ethyl acetate extract
4. concentrationwas concentrated under reduced pressure
5. customthe residue was purified by reverse-phase prep-HPLC