反应详情

温度

130 °C

A 250 mL round bottom flask was charged with 3-aminobut-2-enenitrile (10.00 g, 122 mmol), 2,2,6-trimethyl-4H-1,3-dioxin-4-one (32.4 mL, 244 mmol), and a magnetic stir bar. The flask was equipped with a reflux condenser and a CaCl2 tube and the reaction mixture was heated at 130° C. for 1 h. The reaction was allowed to cool room temperature and was diluted with EtOAc (100 mL). The solid that formed was collected, washed with EtOAc (20 mL), and dried to give 2,6-dimethyl-4-oxo-1,4-dihydropyridine-3-carbonitrile (3.5 g, 23.62 mmol, 19.4% yield) as a beige soild. 1H NMR (400 MHz, DMSO-d6) δ 11.94 (br. s., 1H), 6.04 (s, 1H), 2.41 (s, 3H), 2.21 (s, 3H). MS(ES) [M+H]+ 148.9.

1. customThe flask was equipped with a reflux condenser and a CaCl2 tube
2. temperatureto cool room temperature
3. customThe solid that formed
4. customwas collected
5. washwashed with EtOAc (20 mL)
6. customdried