Tetrahydrofuran → 4-(2-Vinyl-benzooxazol-5-yl)-benzonitrile

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A mixture of 224 mg (1 mmol) of 5-bromo-2-vinyl-benzooxazole, 191 mg (1.3 mmol) of 4-cyanophenylboronic acid, 55 mg (0.03 mmol) of tris-(dibenzylidineacetone)dipalladium (0) (CAS #52409-22-0), 0.2 mL (0.06 mmol) of a 10% solution of tri-tert-butylphosphine in hexane, and 1.5 mL of tetrahydrofuran was stirred at 23° C. for 24 hours. It was then heated at 65° C. for 0.5 hour, then cooled. The mixture was suction filtered to remove particulates, then partitioned between 80 mL of water and a mixture of 30 mL of ethyl acetate and 10 mL of hexane. The organic phase was collected, dried over Na2SO4, and purified by flash chromatography on silica gel (eluting with 1:1 hexane: dichloromethane) to give 4-(2-vinyl-benzooxazol-5-yl)-benzonitrile (192 mg, 78%) as a white solid: mp 143-144° C.;

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