Oxazole, 2-(2,6-difluorophenyl)-4,5-dihydro-4-(4-iodophenyl)- → 4'-[2-(2,6-Difluorophenyl)-4,5-dihydro-4-oxazolyl][1,1'-biphenyl]-4-carbonitrile

Participants

Reaction Conditions

Reaction Steps

The compound of Example 2 (6.5 g, 17 mmol) and bis(triphenylphosphine) palladium dichloride (0.15 g, 0.45 mmol) were dissolved in tetrahydrofuran (60 mL). The compound 4-cyanophenylzinc bromide (Rieke Organometallics, Lincoln, Nebr., 0.28M in tetrahydrofuran, 72 ml) was added over 2 min and the mixture was stirred at 25° C. for 18 h. The reaction mixture was diluted with water (200 mL) and extracted with ether (100 mL). The aqueous layer was extracted with dichloromethane (100 mL) and the combined organic layers were dried over magnesium sulfate and evaporated. The residue was subjected to silica gel chromatography with hexanes/ethyl acetate 5:1 as eluent. The title compound was isolated as a yellow solid (4.5 g): m.p. 136°-138° C. 1H NMR (CDCl3, 300 MHz) δ 7.8-7.0 (11H), 5.6 (1H), 4.9 (1H), 4.3 (1H).

Provenance & Evidence