Reaktion #2395332

Reaktionsgleichung

2-Chloroquinoline

3-methoxyphenylboronic acid

water

K2CO3

→

2-(3-methoxyphenyl)quinoline

Ausbeute 102.1%

Lösungsmittel

ethylene glycol dimethyl ether

ethyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturat reflux under N2 atmosphere overnight
2. 2
   TemperaturThe reaction mixture was cooled
3. 3
   Waschenthe solvent was washed twice with 150 mL portions of brine
4. 4
   TrocknenThe organic layer was dried with anhydrous sodium sulfate
5. 5
   Filtrationfiltered
6. 6
   Sonstigeevaporated
7. 7
   SonstigeThe crude product was purified by column chromatography on a silica gel column
8. 8
   SonstigeThe pure fraction was collected

Vorschrift

2-Chloroquinoline (5.38 g, 32.9 mmol), and 3-methoxyphenylboronic acid (6.0 g, 39.5 mmol) were dissolved in 130 mL of ethylene glycol dimethyl ether. To the solution was added 44 mL of water of a 2M K2CO3 solution followed by triphenylphosphine (0.86, g 3.29 mmol) and palladium(II) acetate (0.184 g, 0.82 mmol,). The reaction mixture was stirred at reflux under N2 atmosphere overnight. The reaction mixture was cooled and the aqueous layer discarded. An additional 200 mL of ethyl acetate was added and the solvent was washed twice with 150 mL portions of brine. The organic layer was dried with anhydrous sodium sulfate, filtered and evaporated. The crude product was purified by column chromatography on a silica gel column using 20% ethyl acetate/hexanes as the eluants. The pure fraction was collected and the solvent was reduced to give 2-(3-methoxyphenyl)quinoline (7.90 g, 94.8% yield).

Quelle