反应详情

To the solution of 110b (60 mg, 0.1 mmol) in methanol (50 mL) was added sodium borohydride (11.5 mg, 0.3 mmol) at 0° C. and the mixture was stirred for another 30 minutes. Then the reaction mixture was quenched with water (3 mL) and concentrated. The residue was purified with reverse-phase prep-HPLC to afford 110 (26.2 mg, 49%). LCMS: [M+H]+ 595. 1H NMR (500 MHz, CDCl3) δ 8.69 (d, J=1.5, 1H), 8.46 (d, J=5.0, 1H), 7.97 (s, 1H), 7.80 (s, 1H), 7.41-7.37 (m, 1H), 7.34 (d, J=1.5, 1H), 6.89 (s, 1H), 6.22 (d, J=8.0, 1H), 6.15 (d, J=8.5, 1H), 5.10 (t, J=6.5, 1H), 4.66-4.64 (m, 1H), 4.51-4.30 (m, 2H), 4.15-4.12 (m, 2H), 3.93-3.89 (m, 1H), 3.71 (s, 3H), 3.58-3.48 (m, 4H), 2.61-2.56 (m, 7H), 2.47-2.39 (m, 3H), 1.91-1.87 (m, 2H), 1.79-1.78 (d, J=5.0, 3H)

1. customThen the reaction mixture was quenched with water (3 mL)
2. concentrationconcentrated
3. customThe residue was purified with reverse-phase prep-HPLC