Potassium Phosphate, Tribasic → 2-Methyl-8-(4-phenyl-2-pyridinyl)benzofuro[2,3-b]pyridine

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Reaction Steps

A mixture of 2-methyl-8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuro[2,3-b]pyridine (4.34 g, 14.03 mmol), 2-chloro-4-phenylpyridine (2.66 g, 14.03 mmol), Pd2(dba)3 (0.257 g 0.281 mmol), dicyclohexyl(2′,6′-dimethoxy-[1,1′-biphenyl]-2-yl)phosphine (0.582 g, 1.42 mmol), potassium phosphate (8.93 g, 42.1 mmol), toluene (180 mL) and water (28 mL) was degassed with nitrogen and then refluxed overnight. The mixture was concentrated and extracted with ethyl acetate. The ethyl acetate layer was dried on Na2SO4 and then further purified by column chromatography using ethyl acetate in hexanes to give 2-methyl-8-(4-phenylpyridin-2-yl)benzofuro[2,3-b]pyridine (3.66 g, 10.88 mmol, 78% yield).

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