Reaktion #63245

Reaktionsgleichung

2-propyl-3,4-dichlorophenol

potassium iodide

sodium hydride

6bromohexanoic acid

→

title compound

6-(2-propyl-3,4-dichlorophenoxy)hexanoic acid

Lösungsmittel

water

ethyl acetate

hexamethylphosphoramide

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONTo the solution were then added 1.3 g
2. 2
   SonstigeThe solution was evaporated to dryness
3. 3
   workup.ADDITIONFresh ethyl acetate and water were added
4. 4
   Sonstigethe layers were separated
5. 5
   workup.ADDITIONFresh ethyl acetate was added to the aqueous layer
6. 6
   SonstigeThe layers were separated
7. 7
   Waschenthe organic layer was washed with a saturated sodium chloride solution
8. 8
   FiltrationThe organic layer was then filtered through sodium sulfate
9. 9
   Sonstigeevaporated to dryness
10. 10
    ExtraktionThe resulting residue was extracted with hexane
11. 11
    Sonstigeevaporated to dryness
12. 12
    Sonstigeto afford 500 mg

Vorschrift

To a solution of 1.1 g. of 2-propyl-3,4-dichlorophenol in 30 ml. of tetrahydrofuran and 30 ml. of hexamethylphosphoramide were added 4.1 g. of 6bromohexanoic acid. To the solution were then added 1.3 g. of a 50% oil dispersion of sodium hydride. A catalytic amount of potassium iodide was added and the reaction was stirred under a nitrogen atmosphere at 60°-70° C. overnight. The reaction was cooled to room temperature and ethyl acetate and water were added. The solution was evaporated to dryness. Fresh ethyl acetate and water were added and the layers were separated. Fresh ethyl acetate was added to the aqueous layer and the aqueous layer was adjusted to pH 2. The layers were separated and the organic layer was washed with a saturated sodium chloride solution. The organic layer was then filtered through sodium sulfate and evaporated to dryness. The resulting residue was extracted with hexane and evaporated to dryness to afford 500 mg. of the title compound.

Quelle