2,2'-Bipyridine → (E)-4-(3-(3,5-dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)-2-(trifluoromethoxy)benzoic acid

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 2-(trifluoromethoxy)-4-vinylbenzoic acid (0.356 g, 1.53 mmol) in 1N methylpyrrolidine (5.0 mL) was added 1-(1-bromo-2,2,2-trifluoroethyl)-3,5-dichloro 4-fluorobenzene (1.0 g, 3.07 mmol), copper(I) chloride (CuCl; 0.03 g, 0.307 mmol) and 2,2 bipyridyl (0.095 g, 0.614 mmol). The reaction mixture was stirred at 150° C. for 1 h. After the reaction was complete by TLC, the reaction mixture was diluted with water (100 mL) and extracted with ethyl acetate (2×50 mL). The combined organic layers were washed with brine, dried over Na2SO4 and concentrated under reduced pressure to obtain the crude compound which was purified by flash column chromatography to afford the product as pale yellow gummy material (0.3 g, 21%): 1H NMR (400 MHz, CDCl3) δ 8.08 (d, J=8.0 Hz, 1H), 7.45 (d, J=1.6 Hz, 1H), 7.35 (s, 3H), 6.63 (d, J=16.0 Hz, 1H), 6.50 (dd, J=16.0, 8.0 Hz, 1H), 4.15 (m, 1H); ESIMS m/z 474.81 ([M−H]−).

Provenance & Evidence