反应详情

A solution of the product of Example 68 (265 mg, 1.0 mmol) in ethanol (5 mL) was stirred with sodium borohydride (Aldrich, 83 mg, 2.2 mmol) at room temperature for 16 hours. The inorganic solid was filtered off with a syringe filter and the liquid mixture was purified by preparative HPLC (Gilson, column, Xbridge® 5 μm, 30×100 mm. eluting solvent, acetonitrile/water (pH=10, NH4HCO3—NH3.H2O buffer), v. 5/95 to 95/5 over 35 minutes, flow rate, 40 mL/minute, uv, 234 nm). Fractions of the desired product were collected and concentrated to give the desired product. 1H NMR (300 MHz, CD3OD) δ 1.51 (d, J=6.7 Hz, 3H), 4.97 (q, J=6.6 Hz, 1H), 7.57-7.73 (m, 3H), 8.13 (dt, J=7.6, 1.5 Hz, 1H), 8.28 (t, J=1.8 Hz, 1H), 8.57 (dt, J=7.9, 1.8 Hz, 1H), 8.74 (dd, J=5.0, 1.8 Hz, 1H), 9.30 (dd, J=2.2, 1.0 Hz, 1H) ppm; MS (DCI/NH3) m/z 268 (M+H)+.

1. filtrationThe inorganic solid was filtered off with a syringe
2. filtrationfilter
3. customthe liquid mixture was purified by preparative HPLC (Gilson, column, Xbridge® 5 μm, 30×100 mm. eluting solvent, acetonitrile/water (pH=10, NH4HCO3—NH3.H2O buffer), v. 5/95 to 95/5 over 35 minutes, flow rate, 40 mL/minute, uv, 234 nm)
4. customFractions of the desired product were collected
5. concentrationconcentrated