Dichloromethane → 4-Benzo[b]thiophen-7-yl-2-fluoro-5-methyl-pyridine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

In a flask, combine 2-fluoro-4-iodo-5-methyl-pyridine (355 mg, 1.5 mmol), 2-benzo[b]thiophen-7-yl-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (282 mg, 1.8 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II), complex with dichloromethane (1:1) (61 mg, 0.07 mmol), 2-(di-tert-butylphosphino)biphenyl (13 mg, 0.04 mmol), sodium carbonate (2 M, 1.5 mL, 3 mmol) and THF (10 mL). Heat the mixture at 100° C. for 3 hours in an oil bath. Dilute the mixture with chloroform/isopropanol (3/1). Wash the solution with saturated aqueous sodium chloride. Dry over sodium sulfate. Concentrate in vacuo to a dark residue. Purify by column chromatography (20% ethyl acetate in hexane) to afford the title compound (300 mg, 82%) as yellow oil. MS (ES) m/z 244 [M+1]+.

Herkunft & Nachweise