反应详情

2-Allyloxymethyl-4-n-propylmorpholine (59.7 g.) is heated under reflux in hydrochloric acid (240 ml., 20%) for 18 hours. The solution is cooled, diluted with ice and water, and basified with sodium hydroxide and extracted with ether (3 × 200 ml.). The ethereal solution is dried (MgSO4) filtered and the ether evaporated to give recovered starting material. The aqueous layer is concentrated to a small volume and precipitated salt is removed by filtration and washed with ether. The filtrate is extracted with ether (3 × 100 ml.) and the combined extracts and ethereal wash are dried (MgSO4) filtered and the ether evaporated. 2-Hydroxymethyl-4-n-propylmorpholine (16.7 g.) is obtained as a viscous oil which forms a hydrogen oxalate, m.p. 133°-135°C. after crystallisation from a methanol/ether mixture.

1. temperatureThe solution is cooled
2. extractionextracted with ether (3 × 200 ml.)
3. dry with materialThe ethereal solution is dried (MgSO4)
4. filtrationfiltered
5. customthe ether evaporated
6. customto give
7. customrecovered
8. concentrationThe aqueous layer is concentrated to a small volume
9. customprecipitated salt
10. customis removed by filtration
11. washwashed with ether
12. extractionThe filtrate is extracted with ether (3 × 100 ml.)
13. washthe combined extracts and ethereal wash
14. dry with materialare dried (MgSO4)
15. filtrationfiltered
16. customthe ether evaporated