Potassium Carbonate → 5-(2-Chloro-6-fluorophenyl)-2-{4-[6-(trifluoromethyl)pyridin-3-yl]phenyl}-2,4-dihydro-3H-1,2,4-triazol-3-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(4-bromophenyl)-5-(2-chloro-6-fluorophenyl)-2,4-dihydro-3H-1,2,4-triazol-3-one (Intermediate-1, 0.100 g, 0.271 mmol) in DMSO (3.0 mL) was added [6-(trifluoromethyl)pyridin-3-yl]boronic acid (0.078 g, 0.40 mmol), K2CO3(0.112 g, 0.81 mmol) and tetrakistriphenyl phosphine palladium (0) (0.062 g, 0.054 mmol). The reaction mass was stirred at 110° C. for 24-48 h. The reaction mass was quenched in water and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulphate and concentrated. The obtained product was purified with column chromatography on silica gel eluting with 4-5% EA:DCM to afford 0.030 g of the desired product. 1H NMR (300 MHz, DMSO d6): δ 7.38-7.48 (m, 1H), 7.61-7.63 (m, 1H), 7.88-7.99 (m, 4H), 8.01-8.17 (m, 2H), 8.41 (d, J=7.8 Hz, 1H), 9.14 (s, 1H), 12.60 (br s, 1H). MS (m/z): 435.25 (M+H)+.

Provenance & Evidence