反应详情

The product of Example 431C (0.697 g, 3.332 mmol) was hydrogenated in methanol (30 mL) with 10% palladium-on-carbon (70 mg) at 1 atmosphere hydrogen pressure (balloon) for 2 hours. The reaction was filtered through a 0.45 micron PTFE membrane and the catalyst thoroughly washed with methanol. The filtrate was concentrated by rotary evaporation to give the title compound (0.585 g, 3.264 mmol, 98%). 1H NMR (300 MHz, DMSO-D6) δ ppm 1.15 (d, J=6.62 Hz, 6 H) 2.61-2.92 (m, 1 H) 6.41 (dd, J=8.46, 1.47 Hz, 1 H) 6.58 (d, J=1.84 Hz, 1 H) 7.60 (d, J=8.46 Hz, 1 H) 8.46 (br s, 2 H); MS (ESI+) m/z 180 (M+H)+.

1. filtrationThe reaction was filtered through a 0.45 micron PTFE membrane
2. washthe catalyst thoroughly washed with methanol
3. concentrationThe filtrate was concentrated by rotary evaporation