反应详情

A solution of 263 g (1 mol) of ethyl 2-(3-nitrobenzylidene)acetoacetate and 241 g (1 mol) of decyl 3-aminocrotonate in 2.4 liters of absolute ethanol was heated to boiling under nitrogen for 18 hours. The mixture was then filtered hot and the filtrate was evaporated in vacuo to about one half of the volume. The concentrated solution was cooled in ice, producing a thick mass of crystals. This was filtered off with suction, recrystallized from ethanol and, after washing with 0.5 liters of n-hexane, was dried in a vacuum oven at 60° C.

1. filtrationThe mixture was then filtered hot
2. customthe filtrate was evaporated in vacuo to about one half of the volume
3. temperatureThe concentrated solution was cooled in ice
4. customproducing a thick mass of crystals
5. filtrationThis was filtered off with suction
6. customrecrystallized from ethanol
7. washafter washing with 0.5 liters of n-hexane
8. customwas dried in a vacuum oven at 60° C.