反应详情

A mixture of 56.0 g (0.2 moles) of 2-bromoethyl p-bromophenyl ether and 45.6 g (0.4 moles) of 1-formylpiperazine in 500 ml of 2-propanol was heated at reflux for 18 hours. The mixture was cooled and filtered. The filter was washed with 2-propanol and the filtrate was evaporated to an oil in vacuo. Water was added and the oil was extracted three times with about 200 ml of chloroform. The extracts were combined, dried over magnesium sulfate and filtered. The filtrate was evaporated to an oil to which 250 ml of 5N sodium hydroxide was added. The mixture was refluxed for 18 hours, cooled and extracted three times with about 200 ml of chloroform. The extracts were combined, dried over magnesium sulfate and evaporated to an oil. The oil was distilled, bp 125°-128° C./0.05 mm of mercury, and gave 40 g of 1-[2-(4-bromophenoxy)ethyl]-piperazine as a yellowing oil.

1. temperaturewas heated
2. temperatureat reflux for 18 hours
3. temperatureThe mixture was cooled
4. filtrationfiltered
5. washThe filter was washed with 2-propanol
6. customthe filtrate was evaporated to an oil in vacuo
7. additionWater was added
8. extractionthe oil was extracted three times with about 200 ml of chloroform
9. dry with materialdried over magnesium sulfate
10. filtrationfiltered
11. customThe filtrate was evaporated to an oil to which 250 ml of 5N sodium hydroxide
12. additionwas added
13. temperatureThe mixture was refluxed for 18 hours
14. temperaturecooled
15. extractionextracted three times with about 200 ml of chloroform
16. dry with materialdried over magnesium sulfate
17. customevaporated to an oil
18. distillationThe oil was distilled