Reaktion #50162

Reaktionsgleichung

4-methoxyphenol

1-bromo-2-ethylhexane

→

1-methoxy-4-(2'-ethylhexyloxy)benzene

Ausbeute 43.4%

Lösungsmittel

methanol

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturthis mixture was heated
2. 2
   Temperaturto reflux for 30 min
3. 3
   TemperaturThe mixture was then heated
4. 4
   Temperaturto reflux for 18 hours
5. 5
   SonstigeThe solvent was removed in vacuo
6. 6
   workup.DISSOLUTIONthe residue dissolved in ether (200 ml)
7. 7
   Waschenwashed with dilute aqueous sodium hydroxide (500 ml ) and water (500 ml )
8. 8
   Trocknendried over MgSO4
9. 9
   Einengenconcentrated in vacuo again
10. 10
    workup.DISTILLATIONDistillation at 120° C./0.1 mm Hg

Vorschrift

Sodium metal (6.50 g, 283 mmol) was dissolved in dry methanol (100 ml) under Ar to give a 2.5M solution of sodium methoxide. A solution of 4-methoxyphenol (29.3 g, 236 mmol) in dry methanol (150 ml) was added and this mixture was heated to reflux for 30 min. After cooling to room temperature, a solution of 1-bromo-2-ethylhexane (46.5 g, 259 mmol) in dry methanol (150 ml) was added dropwise. The mixture was then heated to reflux for 18 hours. The solvent was removed in vacuo, the residue dissolved in ether (200 ml), washed with dilute aqueous sodium hydroxide (500 ml ) and water (500 ml ), dried over MgSO4 and concentrated in vacuo again. Distillation at 120° C./0.1 mm Hg afforded 24.2 g (43%) 1-methoxy-4-(2'-ethylhexyloxy)benzene.

Quelle