Diethyl Ether → 3-(3-fluorophenyl)butanoic acid

A crude solution of 3-(3-fluorophenyl)butyric acid ethyl ester, 10.1 g, 48 mmol] in ethanol (50 mL) was treated with 10 M NaOH solution (50 mL, 857 mmol). The reaction mixture was refluxed overnight. The reaction mixture was dried under reduced pressure in order to get rid of the ethyl alcohol. The resulting residue was re-dissolved in 150 mL of water. The mixture was transferred to a separatory funnel using water (50 mL) and diethyl ether (200 mL). The mixture was equilibrated and the ether layer was removed. The aqueous layer was acidified by HCl solution (pH˜2) and extracted with diethyl ether (300 mL). The organic layer was dried over magnesium sulfate, filtered, and concentrated under reduced pressure. This afforded 8.1 g of an orange viscous oil, 3-(3-fluorophenyl)butyric acid (92.6% yield). This material was determined to be 100% pure by GC/MS analysis.

1. temperatureThe reaction mixture was refluxed overnight
2. customThe reaction mixture was dried under reduced pressure in order
3. customto get rid of the ethyl alcohol
4. customThe mixture was transferred to a separatory funnel
5. customthe ether layer was removed
6. extractionextracted with diethyl ether (300 mL)
7. dry with materialThe organic layer was dried over magnesium sulfate
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure

ORD record

ord-5f98754acd384a1ba73917c09d81434e

Source dataset

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09206143B2