反应详情

The product of Example 1B (1.53g) was taken into a solution of 20% ammonia in methanol, and hydrogenated for 4 hours at 60 psi at 50° C. in the presence of 1.55 g of 10% palladium on carbon as catalyst. The reaction mixture was filtered to remove catalyst, and the solvent removed under reduced pressure to give 1.40 g of the title compound (93% for two steps). 1H NMR(300 MHz, CDCl3) δ 7.25 (d, 1H, J=6.8 Hz), 6.96 (dd, 1H, J=2.0 and 8.1 Hz), 6.85 (d, 1H, J=2.0 Hz), 4.18-4.32 (m, 2H), 4.04 (t, 1H), 2.11-2.21 (m, 1H), 1.80-1.90 (m, 1H), 1.29 (s, 9H). MS (DCI) m/e 206 (M+H)+.

1. filtrationThe reaction mixture was filtered
2. customto remove catalyst
3. customthe solvent removed under reduced pressure