反应详情

A stirred solution of 332 mg (2.44 mmol) of 2-cyano-3-fluoro4-methylpyridine 5-3 in 15 mL of ethanol and 0.61 mL (7.32 mmol) of conc. HCl was hydrogenated over 175 mg of 10% palladium on carbon at 55 psi for 16 h. The catalyst was removed by filtration and the solvents removed at reduced pressure to give 5-4 as a yellow solid: 1H NMR (CD3OD) δ 8.41 (d, 1H, 5.1 Hz), 7.54 (dd, 1H, 5.5, 5.5 Hz), 4.40 (s, 2H), 2.44 (s, 3H).

1. customThe catalyst was removed by filtration
2. customthe solvents removed at reduced pressure