Benzene, 1-iodo-2-(trifluoromethyl)- → 5-(2-Chloro-6-fluorophenyl)-2-(4-{[2-(trifluoromethyl)phenyl]ethynyl}phenyl)-2,4-dihydro-3H-1,2,4-triazol-3-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-(2-chloro-6-fluorophenyl)-2-(4-ethynylphenyl)-2,4-dihydro-3H-1,2,4-triazol-3-one (Intermediate-2, 0.100 g, 0.319 mmol) in DMSO was added 1-iodo-2-(trifluoromethyl)benzene (0.13 g, 0.479 mmol), TBAF (0.301 g, 0.958 mmol) and bis(triphenylphosphine)palladium(II) chloride (0.050 g, 0.071 mmol). The reaction mass was stirred at 110° C. for 5-6 h. The reaction mass was quenched in water and extracted with DCM and concentrated. The obtained product was purified with column chromatography on silica gel eluting with 2.0% EA:DCM to afford 0.040 g of the desired product. 1H NMR (300 MHz, DMSO do): δ 7.50 (t, J=9.3 Hz, 1H), 7.57-7.73 (m, 6H), 7.82 (br s, 2H), 8.02 (d, J=8.7 Hz, 2H), 12.72 (br s, 1H). MS (m/z): 458.26 (M+H)+.

Provenance & Evidence