Br[C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([CH:10]=[CH2:11])=[N:7][C:6]=2[CH:12]=1.[C:13]([C:15]1[CH:20]=[CH:19][C:18](B(O)O)=[CH:17][CH:16]=1)#[N:14].C(P(C(C)(C)C)C(C)(C)C)(C)(C)C.O1CCCC1>CCCCCC>[CH:10]([C:8]1[O:9][C:5]2[CH:4]=[CH:3][C:2]([C:18]3[CH:19]=[CH:20][C:15]([C:13]#[N:14])=[CH:16][CH:17]=3)=[CH:12][C:6]=2[N:7]=1)=[CH2:11]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.; 1H NMR (300 MHz, CDCl3) δ 7.90 (d, J=1.8 Hz, 1 H), 7.76 (d, J=8.4 Hz, 2 H), 7.70 (d, J=8.4 Hz, 2 H), 7.62 (d, J=7.5 Hz, 1 H), 7.55 (dd, J=7.5, 1.8 Hz, 1 H), 6.79 (dd, J=17.4, 10.5 Hz, 1 H), 6.52 (d, J=17.4 Hz, 1 H), 5.91 (d, J=10.5 Hz, 1 H); Mass spectrum: [M+H]+ 247.1.
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