Cesium carbonate → 4-((3-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)-5,5-dimethyl-2,4-dioxoimidazolidin-1-yl)methyl)benzonitrile

Participants

Reaction Steps

3-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)-5,5-dimethylimidazolidine-2,4-dione (Example 12-16a) (250 mg, 0.83 mmol), 4-(chloromethyl)benzonitrile (126 mg, 0.83 mmol), and cesium carbonate (536 mg, 1.65 mmol) were stirred in dimethylformamide (4 mL) at 80° C. for 5 hours. The reaction was allowed to cool to room temperature and then filtered. The filtrate was diluted with ethyl acetate (4 mL) and then water (2 mL) was added. The organic phase was collected, dried over anhydrous Na2SO4, and then concentrated under reduced pressure. The residue was purified by reverse phase HPLC (gradient 10% to 100% methanol in water) and further recrystallized from ethanol. Yield 30%. 1H NMR (DMSO-d6, 400 MHz): s, 6H), 2.15 (s, 3H), 2.42 (s, 3H), 4.65 (s, 2H), 5.20 (s, 2H), 7.60 (d, J=8.4 Hz, 2H), 7.81 (m, 3H), 8.20 (d, J=0.8 Hz, 1H). MS 419 (MH+). The title compound was shown to inhibit hT2R08 bitter receptor and had an IC50 of 0.04 μM

Provenance & Evidence