Reaktion #41207

Reaktionsgleichung

4-piperazin-1-yl-phenol

methyl 3-bromo-butyrate

triethylamine

→

title compound

Ausbeute 59.3%

3-[4-(4-Hydroxy-phenyl)-piperazin-1-yl]-butyric acid methyl ester

Ausbeute 59.3%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONThe mixture was poured onto water
2. 2
   Extraktionextracted with ethyl acetate (50 ml×3)
3. 3
   WaschenThe combined organic layers were washed with brine
4. 4
   Trocknendried over anhydrous Na2SO4
5. 5
   Sonstigeevaporated under vacuum to dryness
6. 6
   SonstigeThe residue was purified by silica gel flash chromatography (1% methanol in CH2Cl2)

Vorschrift

To a mixture of 4-piperazin-1-yl-phenol (2 g, 11.2 mmol) and methyl 3-bromo-butyrate (2.03 g, 11.2 mmol) in DMF (5 mL) was added triethylamine (4.5 mL, 11.53 mmol) dropwise and the reaction mixture was stirred at ambient temperature overnight. The mixture was poured onto water and extracted with ethyl acetate (50 ml×3). The combined organic layers were washed with brine, dried over anhydrous Na2SO4 and evaporated under vacuum to dryness. The residue was purified by silica gel flash chromatography (1% methanol in CH2Cl2) to furnish the title compound (1.85 g, 59.3%); MS; m/z 279 (M+H).

Quelle