反应详情

温度

23 °C

To a solution of 6-methyl-2-oxo-4-(propan-2-yl)-1,2-dihydropyridine-3-carbonitrile (5.00 g, 28.4 mmol) and in MeOH (400 ml) and HCl (8.8 ml, 12 M) was added 10% Pd(OH)2 (5.17 g, 3.68 mmol) under N2 atmosphere. The N2 gas was displaced by H2 gas and the mixture was stirred for 24 h at 23° C. under hydrogen. The H2 gas was displaced by N2 gas and the mixture was filtered through celite, washed with MeOH and concentrated. The residue was triturated with EtOH-TBME, the solid was collected with Buchner funnel and dried in vacuo to give the titled compound (6.15 g, 100%). 1H NMR (400 MHz, DMSO-d6): δ ppm 11.9 (br-s, 1H), 8.03 (br-s, 2H), 6.12 (s, 1H), 3.82-3.84 (m, 2H), 3.08-3.12 (m, 1H), 2.19 (s, 3H), 1.12 (d, J=6.8 Hz, 6H).

1. filtrationthe mixture was filtered through celite
2. washwashed with MeOH
3. concentrationconcentrated
4. customThe residue was triturated with EtOH-TBME
5. customthe solid was collected with Buchner funnel
6. customdried in vacuo