Hydrochloric Acid → HCID 14500503, compound

A solution of 18.06 g (0.07 mol) of 4-bromo-N-(4-hydroxyphenyl)butanamide in about 120 mL of THF was filtered to remove 0.6 g of a solid and placed in a 2 L flask under nitrogen. It was stirred magnetically in an ice bath while 280 mL (0.28 mol) of 1M borane-THF complex was dripped in over 20 minutes. The reaction was stirred cold for 1/2 hour, then at room temperature for 15 minutes, then at reflux for two hours on a steam bath. The reaction was cooled with an ice bath and diluted with 275 mL of methanol followed by 20 mL of 8N ethanolic HCl. This solution was heated at reflux for six hours on a steam bath and then allowed to stand at room temperature overnight. The next morning the solution was evaporated and the residue was dissolved in acetonitrile and evaporated again. The oily residue was slurried three times with ether and the ether decanted after each addition. After the last decanting the solution was evaporated on a rotary evaporator to yield an oil which was taken to the next step without further purification.

1. customto remove 0.6 g of a solid
2. customplaced in a 2 L flask under nitrogen
3. customwas dripped in over 20 minutes
4. stirringThe reaction was stirred cold for 1/2 hour
5. temperatureat reflux for two hours on a steam bath
6. temperatureThe reaction was cooled with an ice bath
7. temperatureThis solution was heated
8. temperatureat reflux for six hours on a steam bath
9. waitto stand at room temperature overnight
10. customThe next morning the solution was evaporated
11. dissolutionthe residue was dissolved in acetonitrile
12. customevaporated again
13. customthe ether decanted
14. additionafter each addition
15. customAfter the last decanting the solution
16. customwas evaporated on a rotary evaporator
17. customto yield an oil which
18. customwas taken to the next step without further purification

ORD record

ord-440d1e4baf6c4fb88362a621ed2fc2b1

Source dataset

uspto-grants-1989_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04835180