反应详情

To a 500 ml four-necked flask equipped with a thermometer, reflux condenser and stirrer were added 300 ml of xylene, 3.36g (0.025 mole) of m-isopropenylphenol, 2.20g(0.0125 mole) of terephthalic acid, 0.2g of boric acid, 0.1g of solfuric acid and 0.01g of N,N-dimethylaniline. The mixture was heated with stirring for 10 hours during which the resulting water was distilled off as an azeotropic mixture with the xylene and fresh xylene was suitable supplied from a dropping funnel. After completion of the reaction, the reaction solution was washed with three 200 ml portions of 5% aqueous sodium hydroxide solution and two 200 ml portions of water, and then dried over anhydrous calcium chloride. On evaporating the xylene and recrystallizing from ethanol, bis-(3-isopropenylphenyl)terephthalate was obtained.

1. customTo a 500 ml four-necked flask equipped with a thermometer
2. temperaturereflux condenser and stirrer
3. temperatureThe mixture was heated
4. distillationwas distilled off as an azeotropic mixture with the xylene and fresh xylene
5. customwas suitable supplied from a dropping funnel
6. customAfter completion of the reaction
7. washthe reaction solution was washed with three 200 ml portions of 5% aqueous sodium hydroxide solution and two 200 ml portions of water
8. dry with materialdried over anhydrous calcium chloride
9. customOn evaporating the xylene
10. customrecrystallizing from ethanol