反应详情

温度

50 °C

In 30 ml of dry dimethylformamide was dissolved 0.88 g of 60% sodium hydride in oil. With ice cooling and stirring, a solution of 5.62 g of 2-(4-hydroxy-3,5-dimethylphenyl)-5-methoxy-3-methylindole in dry dimethylformamide was added dropwise. After the addition, the mixture was stirred further for 1 hour. A solution of 2.2 g of succinic anhydride in dimethylformamide was added dropwise to the resulting solution. After the addition, the mixture was stirred at room temperature for 2 hours, then heated at 50° C. for 30 minutes, and further stirred at room temperature for 3 hours. The reaction solution was poured into water, acidified with dilute hydrochloric acid, and extracted with ethyl acetate. The organic layer was washed with water, and extracted with aqueous sodium bicarbonate solution. The extracted aqueous layer was acidified with dilute hydrochloric acid, and extracted with 100 ml of ethyl acetate three times. The organic layers were washed and dried, and the solvent was evaporated under reduced pressure to give a crystalline residue. Rerrystallization of the residue from ethyl acetate/benzene gave 2-4-(3-carboxy- propionyloxy)-3,5-dimethylphenyl]-5-methoxy-3-methylindole.

1. additionAfter the addition
2. stirringthe mixture was stirred further for 1 hour
3. additionAfter the addition
4. stirringthe mixture was stirred at room temperature for 2 hours
5. stirringfurther stirred at room temperature for 3 hours
6. extractionextracted with ethyl acetate
7. washThe organic layer was washed with water
8. extractionextracted with aqueous sodium bicarbonate solution
9. extractionextracted with 100 ml of ethyl acetate three times
10. washThe organic layers were washed
11. customdried
12. customthe solvent was evaporated under reduced pressure
13. customto give a crystalline residue