2'-(Dicyclohexylphosphino)-N2,N2,N6,N6-tetramethyl[1,1'-biphenyl]-2,6-diamine → 2,6-Dimethyl-8-(5-(3,3,3-trifluoropropyl)quinolin-2-yl)benzofuro[2,3-b]pyridine

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Reaction Steps

8-(5-chloroquinolin-2-yl)-2,6-dimethylbenzofuro[2,3-b]pyridine (3.40 g, 9.48 mmol), 2′-(dicyclohexylphosphino)-N2,N2,N6,N6-tetramethyl-[1,1′-biphenyl]-2,6-diamine (0.33 g, 0.76 mmol) and diacetoxypalladium (0.09 g, 0.38 mmol) were charged into a flask and diluted with THF (150 mL). This mixture was degassed by bubbling nitrogen followed by the addition of (3,3,3-trifluoropropyl)zinc(II) iodide (40 mL, 11.8 mmol) via syringe. This mixture was stirred at room temperature overnight. Upon completion of the reaction, it was quenched with aqueous ammonium chloride then was extracted two times with 200 mL ethyl acetate. These extracts were dried over magnesium sulfate then were filtered and concentrated under vacuum. The crude residue was purified by column chromatography using 20/80 Ethyl Acetate/Heptanes. The combined fractions were triturated in Heptanes to afford 2,6-dimethyl-8-(5-(3,3,3-trifluoropropyl)quinolin-2-yl)benzofuro[2,3-b]pyridine (2.55 g, 64% yield) as an off-white powder.

Provenance & Evidence