Reaktion #41208

Reaktionsgleichung

compound

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

K2CO3

3-bromopropyne

→

title compound

Ausbeute 39.7%

3-[4-(4-Prop-2-ynyloxy-phenyl)-piperazin-1-yl]-propionic acid methyl ester

Ausbeute 39.7%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigepartitioned between water and ethyl acetate
2. 2
   Waschenwashed with brine
3. 3
   Trocknendried over anhydrous Na2SO4
4. 4
   Sonstigeevaporated under vacuum
5. 5
   Sonstigeto give a brown oil
6. 6
   SonstigeThe crude product was purified by silica gel flash chromatography (30% ethyl acetate in hexane)

Vorschrift

To a mixture of the compound from step 1 (278 mg, 1.0 mmol) and K2CO3 (152 mg, 1.1 mmol) in DMF (5 mL) was added 3-bromopropyne (130 mg, 1.1 mmol) dropwise at rt. The reaction mixture was stirred at rt overnight and then partitioned between water and ethyl acetate. The organic payers were combined and washed with brine, dried over anhydrous Na2SO4 and evaporated under vacuum to give a brown oil. The crude product was purified by silica gel flash chromatography (30% ethyl acetate in hexane) to furnish the title compound (120 mg, 38%) as a light yellow solid; MS; m/z 317 (M+H).

Quelle