反应详情

Under a nitrogen atmosphere, 117.2 g of 3,5-di-tert-butyl-4-hydroxybenzaldehyde, 66.6 g of rhodanine, and 143.5 g of fused sodium acetate were heated at reflux in 2500 ml of glacial acetic acid. After heating for 23 hours, the reaction mixture was cooled and poured into a mixture of 1 liter of ethanol and 1 liter of ice, with stirring. Water (500 ml) was added and, after stirring for 30 minutes, the resulting precipitate was recovered by filtration. The solid was slurried with 500 ml of ethyl acetate and filtered. The precipitate was dissolved in 3 liters of ethanol, heated to boiling, and water was added until the solution remained cloudy (approximately 450 ml of water). Upon cooling to room temperature, 99.6 g of title product were recovered by filtration, m.p. approximately 260° C.

1. temperatureAfter heating for 23 hours
2. temperaturethe reaction mixture was cooled
3. stirringafter stirring for 30 minutes
4. filtrationthe resulting precipitate was recovered by filtration
5. filtrationfiltered
6. dissolutionThe precipitate was dissolved in 3 liters of ethanol
7. temperatureheated
8. additionwater was added until the solution
9. filtration99.6 g of title product were recovered by filtration, m.p. approximately 260° C.