Hydrochloric Acid → 2-(2,4-Dichlorophenoxy)propan-1-ol

43 ml of a 1 M solution of borane in tetrahydrofuran (THF) were stirred under nitrogen and cooled in ice while a solution of 6.8 g of 2-(2,4-dichlorophenoxy)propionic acid in 40 ml of THF was added dropwise thereto. The mixture was heated to boiling under reflux for 1 hour and then cooled to room temperature. 22 ml of a saturated solution of hydrogen chloride in methanol were added dropwise and the solution was heated to boiling under reflux for 1 hour. The mixture was evaporated and the residue was treated with 22 ml of a saturated solution of hydrogen chloride in methanol. After heating under reflux for 1 hour the mixture was evaporated and the residue was partitioned between 100 ml of saturated sodium bicarbonate solution and 100 ml of methylene chloride. The layers were separated and the aqueous layer was extracted with 100 ml of methylene chloride. The combined organic extracts were dried over sodium sulphate and evaporated to give 6.4 g of 2-(2,4-dichlorophenoxy)-propanol as a yellow oil.

1. additionwas added dropwise
2. temperatureThe mixture was heated
3. temperatureunder reflux for 1 hour
4. temperaturethe solution was heated
5. temperatureunder reflux for 1 hour
6. customThe mixture was evaporated
7. additionthe residue was treated with 22 ml of a saturated solution of hydrogen chloride in methanol
8. temperatureAfter heating
9. temperatureunder reflux for 1 hour the mixture
10. customwas evaporated
11. customthe residue was partitioned between 100 ml of saturated sodium bicarbonate solution and 100 ml of methylene chloride
12. customThe layers were separated
13. extractionthe aqueous layer was extracted with 100 ml of methylene chloride
14. dry with materialThe combined organic extracts were dried over sodium sulphate
15. customevaporated

ORDレコード

ord-6f7accd342e845e395bd2972a3a6ef06

出典データセット

uspto-grants-1990_09

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US04956346