Pyrazole → HCID 52914255, compound

Participants

Reaction Steps

6,9-Difluoro-2-(1-iodophenyl)-5-{[4-(1H-pyrazol-1-yl)phenyl]methyl}-2,5-dihydro-3H-pyrazolo[4,3-c]quinolin-3-one [(Example 53), 36 mg, 0.062 mmol], potassium phosphate (40 mg, 0.19 mmol, 3 equiv), (±)-trans-N,N′-bismethyl-1,2-cyclohexane diamine (7.1 mg, 0.050 mmol, 0.8 equiv), copper(I) iodide (4.7 mg, 0.025 mmol, 0.4 equiv) and pyrazole (8.5 mg, 0.12 mmol, 2 equiv) were combined in dimethylsulfoxide (0.9 mL) and water (0.1 mL). The mixture was sparged under a nitrogen atmosphere, the vessel was sealed and placed into an preheated oil bath at 130° C. for 3 hours. The mixture was cooled to ambient temperature, poured into water (10 mL) and extracted with ethyl acetate (2×50 mL). The combined organic extracts were dried with sodium sulfate, filtered and concentrated in vacuo. The residue was purified by preparative reverse phase HPLC (20:80 to 95:5; water containing 0.1% trifluoroacetic acid:acetonitrile containing 0.1% trifluoroacetic acid). The appropriate fractions were poured into sodium bicarbonate (50 mL, aqueous saturated) and extracted with ethyl acetate (2×50 mL). The combined organic extracts were dried with sodium sulfate, filtered and concentrated in vacuo, providing the titled compound: 1H-NMR (400 MHz, d6-DMSO) δ 8.96 (1H, s), 8.46 (1H, d, J=2.6 Hz), 7.81 (2H, d, J=8.7 Hz), 7.76-7.68 (3H, m), 7.64-7.47 (5H, m), 7.40 (1H, td, J=8.9, 3.5 Hz), 7.30 (2H, d, J=8.6 Hz), 6.53 (1H, dd, J=2.4, 2.0 Hz), 6.34 (1H, dd, J=2.4, 1.9 Hz), 5.75 (2H, d, J=3.1 Hz) ppm; high resolution mass spectrometry (ES+) m/z 520.1697 [(M+H)+; calculated for C29H19F2N7O: 520.1692].

Provenance & Evidence