反应详情

The product from step 3 (3.27 mmol) was dissolved in THF (10.9 mL), and 1 N aq. NaOH (6.54 mL, 6.54 mmol) was added, followed by MeOH (5.5 mL). This solution was allowed to stir for 3 h, then concentrated. The crude product was then purified on a reverse phase column (MeCN:H2O+0.1% TFA), and the combined product fractions were basified to pH 9 using NH4OH, then extracted with CH2Cl2 (3×50 mL). The combined organic was then concentrated. The residue was lyophilized from MeCN/H2O to give the product as a white solid. 1H NMR (400 MHz, CDCl3) δ 8.70 (dd, 1H, J=1.4, 4.2 Hz), 7.96 (dd, 1H, J=1.4, 8.2 Hz), 7.35 (s, 1H), 7.22 (dd, 1H, J=4.4, 8.0 Hz), 6.71 (s, 1H), 4.12-4.05 (m, 4H), 4.05-3.82 (m, 4H), 3.80-3.72 (m, 4H), 3.62-3.56 (m, 2H), 3.49-3.40 (m, 4H), 3.22-3.15 (m, 2H), 2.58 (t, 2H, J=7.0 Hz), 2.41 (s, 3H), 2.24-2.17 (m, 4H), 1.98-1.90 (m, 2H), 1.69-1.59 (m, 2H). MS (ES) m/z 540.5 (M+H+).

1. concentrationconcentrated
2. customThe crude product was then purified on a reverse phase column (MeCN:H2O+0.1% TFA)
3. extractionextracted with CH2Cl2 (3×50 mL)
4. concentrationThe combined organic was then concentrated