Water → 2,6-Bis(4-(trifluoromethyl)phenyl)-4-pyridinecarbonitrile

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Reaction Steps

2-6-dichloropyridine-4-carbonitrile 24 (3.7 g, 21.35 mmol) was dissolved in 100 ml of dimethoxyethane. To the solution were added 70 ml of water, sodium bicarbonate (3 equiv., 5.38 g), [4-(trifluoromethyl)phenyl]boronic acid (2.4 equiv., 9.74 g) and the mixture was stirred at rt for 5′. The mixture was degassed and put under argon. A catalytic amount of tetrakispalladium was added and the mixture was heated at 100° C. overnight. The solvents were evaporated off and the residue was dissolved with ethyl acetate, washed with water and brine. The organic phase was dried over sodium sulfate and concentrated under vacuum. The crude was crystallized from ethyl acetate and petroleum ether to give 28A as a beige solid. (2.5 g, 30% yield)

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