反应详情

A suspension of 2.29 g of 2-(2-chloroethyloxy)benzaldehyde ethyleneacetal, 1.73 g of N-phenylpiperazine, 1.50 g of anhyrous potassium carbonate and 15 ml of dimethylformamide is stirred at 70°-80° C. for about 18 hours under argon atmosphere. The reaction mixture is concentrated under reduced pressure to remove dimethylformamide. Water is added to the residue, and the aqueous mixture is extracted with ether. The extract is washed with water, dried and concentrated under reduced pressure to remove solvent. The residue is dissolved in 10 ml of methanol, and 10% hydrochloric acid is added thereto. The mixture is heated at 60° to 70° C. for 10 to 20 minutes, and then is made alkaline with 10% sodium hydroxide solution and extracted with ether. The extract is washed with water, dried and concentrated under reduced pressure to remove solvent. The residue is purified by silica gel chromatography (solvent, ethyl acetate:chloroform=2:8). 1.33 g of 2-[2-(4-phenylpiperazin-1-yl)ethyloxy]benzaldehyde are obtained as a colorless oil.

1. concentrationThe reaction mixture is concentrated under reduced pressure
2. customto remove dimethylformamide
3. additionWater is added to the residue
4. extractionthe aqueous mixture is extracted with ether
5. washThe extract is washed with water
6. customdried
7. concentrationconcentrated under reduced pressure
8. customto remove solvent
9. dissolutionThe residue is dissolved in 10 ml of methanol
10. addition10% hydrochloric acid is added
11. temperatureThe mixture is heated at 60° to 70° C. for 10 to 20 minutes
12. extractionextracted with ether
13. washThe extract is washed with water
14. customdried
15. concentrationconcentrated under reduced pressure
16. customto remove solvent
17. customThe residue is purified by silica gel chromatography (solvent, ethyl acetate:chloroform=2:8)