3,5-Dichloro-2-cyanopyridine → HCID 66874911, compound

Participants

Reaction Steps

To a solution of 1-(4-ethynylphenyl)ethanone (commercially available) (1 eq) 3,5-dichloropicolinonitrile (1 eq), dichlorobis(triphenylphosphine)-palladium (II) (20 mol %), copper iodide (10 mol %) and DMF:Triethylamine (10:1) (0.13 M) was stirred at ambient temperature overnight. The reaction mixture was then diluted with ethyl acetate and sodium bi-carbonate solution. The two phases were separated, and the aqueous phase was extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulfate, and concentrated en vacuo. The crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 0-100% ethyl acetate in hexane and 5-((4-acetylphenyl)ethynyl)-3-chloropicolinonitrile was isolated as a yellow solid

Provenance & Evidence