Reaktion #10166

Reaktionsgleichung

water

potassium carbonate

methyl 2-iodobenzoate

4-cyano-phenylboronic acid

→

methyl 4′-cyano-1,1′-biphenyl-2-carboxylate

Ausbeute 86.0%

Lösungsmittel

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThis mixture was heated
2. 2
   Temperaturto reflux for 3.5 hours
3. 3
   SonstigeThe solvent was then removed under reduced pressure
4. 4
   ExtraktionThe organic layer was extracted with additional EtOAc
5. 5
   WaschenThe combined organics were washed with water
6. 6
   TrocknenThe organics were then dried over sodium sulfate
7. 7
   Filtrationfiltered
8. 8
   Einengenconcentrated
9. 9
   Sonstigeto obtain the crude product
10. 10
    Wascheneluting with 8:1 heptane

Vorschrift

To 500 mL of THF was added water (18.4 mL, 1.02 mol), potassium carbonate (70.5 g, 0.510 mol), methyl 2-iodobenzoate (53.5 g, 0.204 mol), 4-cyano-phenylboronic acid (30.0 g, 0.204 mol) and bis-(tri-o-tolylphosphine) palladium (II) chloride (1.65 g, 2.04 mmol). This mixture was heated to reflux for 3.5 hours and then cooled to ambient temperature for continued stirring overnight. The solvent was then removed under reduced pressure prior to dilution with EtOAc/water. The organic layer was extracted with additional EtOAc. The combined organics were washed with water, then brine. The organics were then dried over sodium sulfate, filtered, and then concentrated to obtain the crude product. This crude product was passed through a silica pad, eluting with 8:1 heptane:EtOAc to get 41.6 grams of methyl 4′-cyano-1,1′-biphenyl-2-carboxylate.

Quelle