Reaktion #357321

Reaktionsgleichung

water

6-Bromo-2-naphthol

sodium hydride

ethyl iodide

→

solid

Ausbeute 60.0%

2-Bromo-6-ethoxy-naphthalene

Ausbeute 60.0%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGThe reaction was stirred overnight at rt
2. 2
   Extraktionextracted several times with tert-butyl methyl ether
3. 3
   WaschenThe combined organic extracts were washed with water and brine
4. 4
   Trocknendried over MgSO4
5. 5
   Filtrationfiltered
6. 6
   Sonstigeevaporated under reduced pressure
7. 7
   Sonstigeto give tan solid
8. 8
   SonstigeThis was recrystallized from MeOH
9. 9
   Sonstigedried under high vacuum to a constant wt.

Vorschrift

To a suspension of sodium hydride (800 mg, 60% oil dispersion) in DMF (20 ml) was added a solution of 6-Bromo-2-naphthol dropwise with stirring at 0°. After gas evolution had ceased, neat ethyl iodide (1.6 ml) was added dropwise to the stirred solution. The reaction was stirred overnight at rt. The reaction mixture was poured into water and extracted several times with tert-butyl methyl ether. The combined organic extracts were washed with water and brine, then dried over MgSO4, filtered and evaporated under reduced pressure to give tan solid. This was recrystallized from MeOH and dried under high vacuum to a constant wt. giving a white solid (3.11 g, 60%). 1H NMR(400 MHz, CDCl3) δ 7.92 (d, J=1.7 Hz, 1H), 7.65(d, J=8.9 Hz, 1H), 7.59 (d, J=8.7 Hz, 2H), 7.16 (dd, J=8.9 Hz, 2.48, 1H), 7.09 (d, J=2.4 Hz, 1H), 4.15 (q, 2H), 1.49 (t, 3H).

Quelle