Reaktion #53378

Reaktionsgleichung

4-Iodoanisol

iodide

4-pentyn-1-ol

→

product 16

Ausbeute 88.9%

5-(4-Methoxyphenyl)pent-4-yn-1-ol

Ausbeute 88.9%

Lösungsmittel

diethylamine

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe solvent was removed under reduced pressure
2. 2
   workup.ADDITIONEthyl acetate (150 mL) was added to the residue
3. 3
   Waschenthe mixture was washed with 2N HCl, brine and water
4. 4
   SonstigeThe organic fraction was isolated
5. 5
   Trocknendried with sodium sulfate
6. 6
   Sonstigethe solvent was removed under reduced pressure

Vorschrift

4-Iodoanisol (10 g, 42 mmol), palladium (II) chloride (0.2 g, 1.1 mmol) and triphenylphosphine (0.6 g, 2.2 mmol) were dissolved in diethylamine (100 mL) then cupper(I) iodide (0.5 g, 2.2 mmol) and 4-pentyn-1-ol (5 mL, 53 mmol) were added. The reaction mixture was stirred overnight at room temperature, then the solvent was removed under reduced pressure. Ethyl acetate (150 mL) was added to the residue and the mixture was washed with 2N HCl, brine and water. The organic fraction was isolated, dried with sodium sulfate and the solvent was removed under reduced pressure. The product 16 (7.1 g. 87%) was isolated by flash chromatography (silica gel, 1:2 ethyl acetate/hexanes) as an oily yellow solid. 1H NMR (300 MHz, CDCl3) δ1.88 (m, 2H), 2.53 (m, 2H), 3.72 (s, 3H), 3.74 (m, 2H), 6.83 (d, 2H), 7.45 (d, 2H).

Quelle