反应详情

The product of Example 352B (277 mg, 0.7398 mmol) in ethanol (20 mL) was hydrogenated at 1 atmosphere hydrogen pressure (balloon) with 10% palladium on carbon (28 mg, 10 weight %) for 1.25 hour. The reaction was filtered through a PTFE membrane filter (0.45 μm) and the catalyst thoroughly washed with ethanol (50 mL). The filtrate was concentrated under reduced pressure and the resulting oil triturated with dichloromethane/hexanes (1:1 v/v) to give the title compound as a crystalline white solid (194 mg, 92%). MS (ESI−) m/z 283 (M−H)−. 1H NMR (300 MHz, DMSO-d6) δ 1.21 (t, J=7.17 Hz, 3 H) 3.64 (s, 2 H) 4.15 (q, J=7.23 Hz, 2 H) 7.06 (d, J=2.57 Hz, 1 H) 7.11 (dd, J=8.83, 2.57 Hz, 1 H) 7.20 (d, J=8.83 Hz, 1 H) 10.21 (s, 1 H) 12.11 (s, 1 H).

1. filtrationThe reaction was filtered through a PTFE membrane
2. filtrationfilter (0.45 μm)
3. washthe catalyst thoroughly washed with ethanol (50 mL)
4. concentrationThe filtrate was concentrated under reduced pressure
5. customthe resulting oil triturated with dichloromethane/hexanes (1:1 v/v)