A mixture of 3-bromo-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one (300 mg, 0.940 mmol), (2-phenylfuran-3-yl)boronic acid (265 mg, 1.41 mmol), Na2CO3 (299 mg, 2.82 mmol) and Pd(PPh3)4 (54.3 mg, 0.047 mmol) in DME (3.6 mL) and water (1.1 mL) was heated to 80° C. for 4 h under Ar atmosphere. The mixture was diluted with water, extracted with AcOEt, washed with NaHCO3 aqueous solution, dried over Na2SO4, filtered, concentrated in vacuo, purified by column chromatography on basic silica gel (hexane/AcOEt=80/20 to 0/100) and recrystallized with AcOEt/heptane to yield the title compound (23.9 mg, 7% yield) as a pale yellow solid: mp 159-163° C. 1H NMR (DMSO-d6, 300 MHz): δ ppm 6.63 (1H, d, J=8.0 Hz), 6.99 (1H, d, J=1.9 Hz), 7.32-7.43 (3H, m), 7.54-7.60 (2H, m), 7.69-7.76 (2H, m), 7.78-7.82 (1H, m), 7.85 (1H, d, J=1.9 Hz), 7.85-7.92 (1H, m), 8.96 (1H, d, J=8.0 Hz). Anal. Calcd for C21H13F3N2O2.0.3H2O: C, 65.05; H, 3.54; N, 7.22. Found: C, 65.20; H, 3.63; N, 7.29.
