Potassium Hydroxide → 5-azidopentanoic Acid

Temperature

0 °C

Methyl 5-azidovalerate (4.01 g, 25.5 mmol) and KOH (7.58 g, 0.135 mol) were dissolved in a mixture of 70 ml of water and 90 ml of MeOH. The solution was stirred at 0° C. After 2 hrs, the MeOH was removed in vacuo. The aqueous layer was extracted by CHCl3 (50 ml), acidified to pH=1 by 2N aqueous HCl and extracted by Et2O (2×100 ml). The organic layers were combined, washed with water (100 ml) and dried over Na2SO4. After filtration and evaporation of solvent, 5-azidovaleric acid (2.85 g, 77.6%) was obtained as a colorless oil.

1. customthe MeOH was removed in vacuo
2. extractionThe aqueous layer was extracted by CHCl3 (50 ml)
3. extractionextracted by Et2O (2×100 ml)
4. washwashed with water (100 ml)
5. dry with materialdried over Na2SO4
6. filtrationAfter filtration and evaporation of solvent

ORD record

ord-27403bd7140440059415051404ee2b0e

Source dataset

uspto-grants-2001_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06211198B1