Triphenylphosphine → [4-(4-Aminobutyl)phenyl]acetic acid

Temperatur

25 °C

Azide 7 (1.7 g, 7.2 mmol) and triphenylphosphine (1.9 g, 7.2 mmol) were dissolved in a 10% solution of water in THF (66 mL) and stirred overnight at 25° C. Then more triphenylphosphine (0.8 g, 3 mmol) was added and the heating was continued at 60° C. (oil bath) for 6 h. The solvent was removed under reduced pressure and the residue was treated with 2M HCl (100 mL) and extracted with ethyl acetate (2×50 mL). The water fraction was collected and ammonium hydroxide was added until the pH reached approximately 13. The mixture was extracted with ethyl acetate (2×100 mL) then the organic fraction was washed with brine, water and dried with sodium sulfate. Ethyl acetate was removed under reduced pressure to give 0.8 g (53%) of amine 8.

1. customwas continued at 60° C.
2. customfor 6 h
3. customThe solvent was removed under reduced pressure
4. additionthe residue was treated with 2M HCl (100 mL)
5. extractionextracted with ethyl acetate (2×50 mL)
6. customThe water fraction was collected
7. additionammonium hydroxide was added until the pH
8. extractionThe mixture was extracted with ethyl acetate (2×100 mL)
9. washthe organic fraction was washed with brine, water
10. dry with materialdried with sodium sulfate
11. customEthyl acetate was removed under reduced pressure

ORD-Eintrag

ord-64ebc3fc6a3d43e28ca14a791fae0024

Quelldatensatz

uspto-grants-2005_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06858615B2