反应详情

温度

100 °C

To a solution of 4-pyridine carboxaldehyde (36.7 mL, 0.384 mol) and malonic acid (40g, 0.384 mol) in 31 mL of pyridine was added piperdine (0.12 mL) and the mixture was warmed to 100° C. Caution: large volumes of CO2 evolved. After 0.5 h, the reaction was cooled to room temperature (RT) and the solution solidified. This was triturated with 240 mL of water and filtered, and washed with 2×50 mL portions of water. The solid was dried overnight at 42° C. under vacuum (10 mm Hg) to provide 37.1 g of a white solid; mp 295°-297° C.

1. temperaturethe reaction was cooled to room temperature (RT)
2. customThis was triturated with 240 mL of water
3. filtrationfiltered
4. washwashed with 2×50 mL portions of water
5. customThe solid was dried overnight at 42° C. under vacuum (10 mm Hg)