2,2'-Bipyridine → (E)-2-(3-nitro-1H-1,2,4-triazol-1-yl)-5-(4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-1-enyl)benzonitrile

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 2-(3-nitro-1H-1,2,4-triazol-1-yl)-5-vinylbenzonitrile (0.9 g, 3.7 mmol) in 1,2-dichlorobenzene (10 mL), were added 5-(1-bromo-2,2,2-trifluoroethyl)-1,2,3-trichlorobenzene (2.5 g, 7.5 mmol), CuCl (73 mg, 0.74 mmol) and 2,2-bipyridyl (0.23 g, 1.49 mmol) and the resultant reaction mixture was degassed with argon for 30 min and then stirred at 180° C. for 14 h. After completion of the reaction (TLC), the reaction mixture was cooled to ambient temperature and filtered and the filtrate was concentrated under reduced pressure. Purification by flash chromatography (SiO2, 100-200 mesh, 25-30% EtOAc in Pet ether) afforded the title compound as an off white solid (0.9 g, 50%): mp 70-73° C.; 1H NMR (300 MHz, CDCl3) δ 8.86 (s, 1H), 7.88 (m, 3H), 7.44 (s, 2H), 6.67 (d, J=16.0 Hz, 1H), 6.56 (dd, J=16.0, 7.6 Hz, 1H), 4.19 (m, 1H); ESIMS m/z 436.11 ([M−2H]−).

Provenance & Evidence