1,4-Dioxane → 2-Fluoro-3-(2-methoxy-4-nitrophenyl)pyridine

Participants

Reaction Steps

2.00 g (7.17 mmol) of 2-iodo-5-nitroanisole, 2.02 g (14.3 mmol) of (2-fluoropyridin-3-yl)boronic acid (A. Bouillon, J.-C. Lancelot, V. Collot, P. R. Bovy, S. Rault, Tetrahedron 2002, 58, 3323-3328.), 1.81 g (21.5 mmol) of sodium hydrogen carbonate and 117 mg (0.14 mmol) of [1,1′-bis(diphenylphosphino)ferrocene]palladium dichloride are heated to 100° C. in a degassed mixture of 40 ml of dioxane and 10 ml of water for 1 h. After cooling, the mixture is diluted with water and extracted three times with ethyl acetate. The combined organic phases are dried over sodium sulfate, clarified over activated carbon and concentrated. Purification is effected by chromatography on silica gel (eluent: dichloromethane) to obtain 1.55 g (87% of theory) of the desired product.

Provenance & Evidence