Reaktion #2039513

Reaktionsgleichung

2-chloro-3-fluoro-4-(trifluoromethyl)pyridine

3-bromo-5-chlorophenol

potassium carbonate

N-methylpyrrolidinone

→

title compound

3-(3-bromo-5-chlorophenoxy)-2-chloro-4-(trifluoromethyl)pyridine

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe reaction mixture was placed in an oil bath at 120° C
2. 2
   workup.ADDITIONwas added
3. 3
   ExtraktionThe mixture was extracted with ethyl acetate (2×100 mL)
4. 4
   Waschenthe combined organic fractions were washed with brine (3×100 mL)
5. 5
   Trocknendried (MgSO4)
6. 6
   Filtrationfiltered
7. 7
   Sonstigethe solvent was evaporated under reduced pressure
8. 8
   Sonstigepurified by column chromatography on a pre-packed silica gel Redi Sep 330 gram column
9. 9
   Wascheneluting with 0-75% CH2Cl2 in hexanes

Vorschrift

To a round bottom flask charged with 3-bromo-5-chlorophenol (5.20 g, 25.1 mmol) and potassium carbonate (3.46 g, 25.1 mmol) was added N-methylpyrrolidinone (25 mL). To this suspension under N2 was added 2-chloro-3-fluoro-4-(trifluoromethyl)pyridine (5.00 g, 25.1 mmol) and the reaction mixture was placed in an oil bath at 120° C. After 60 minutes, the reaction mixture was allowed to cool to room temperature at which point, water (100 mL) was added. The mixture was extracted with ethyl acetate (2×100 mL) and the combined organic fractions were washed with brine (3×100 mL), dried (MgSO4), filtered and the solvent was evaporated under reduced pressure. The resulting residue was adsorbed onto silica gel and purified by column chromatography on a pre-packed silica gel Redi Sep 330 gram column, eluting with 0-75% CH2Cl2 in hexanes to yield the title compound. 1H NMR (CDCl3) δ 8.53 (d, J=5.0 Hz, 1H), 7.62 (d, J=5.0 Hz, 1H), 7.29-7.27 (m, 1H), 6.87-6.84 (m, 1H), 6.76-6.73 (m, 1H). FIRMS (M+1)=385.8957.

Quelle