Reaktion #337305

Reaktionsgleichung

4-bromopyridin-2-amine

2-methoxypyridin-3-ylboronic acid

sodium carbonate

→

2-methoxy-3,4′-bipyridin-2′-amine

Ausbeute 93.9%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturcooled to room temperature
2. 2
   ExtraktionThe product was extracted with ethyl acetate (2×50 mL)
3. 3
   Trocknendried with MgSO4
4. 4
   Filtrationfiltered
5. 5
   Einengenconcentrated in vacuo
6. 6
   SonstigeThe crude product was purified by chromotography (Biotage: 100 to 90/10% ethyl acetate-ethyl acetate/methanol)

Vorschrift

To 4-bromopyridin-2-amine (0.5 g, 2.8 mmol), 2-methoxypyridin-3-ylboronic acid (0.52 g, 3.4 mmol) in DMF (25 mL) was added 1N sodium carbonate (10 mL, 2.3 mmol), followed by 1,1′-bis(diphenylphosphino)ferrocene-palladium(II)dichloride dichloromethane complex (0.21 g, 0.26 mmol). The reaction mixture was stirred for 3 hours at 85° C. and then cooled to room temperature. The product was extracted with ethyl acetate (2×50 mL), dried with MgSO4, filtered, and concentrated in vacuo. The crude product was purified by chromotography (Biotage: 100 to 90/10% ethyl acetate-ethyl acetate/methanol) to yield 2-methoxy-3,4′-bipyridin-2′-amine (0.53 g, 2.63 mmol, 93% yield) as a brown powder. The product was taken directly to the next step.

Quelle