Triethylamine → HCID 57422499, compound

Participants

Reaction Steps

4-((4-isocyanato-1H-pyrazol-1-yl)methyl)-3,5-dimethylisoxazole (example 10-1) (784 mg, 3.6 mmol), serine methyl ester hydrochloride (672 mg, 4.32 mmol) and triethylamine (1 mL, 7.2 mmol) were refluxed in toluene (16 mL) for 8 hours. The reaction was allowed to cool to room temperature and then the solution was concentrated on the rotovap. The product was purified by reverse phase HPLC (5 to 95% acetonitrile in H2O: 16 minute gradient) to afford 3-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)-5-(hydroxymethyl)imidazolidine-2,4-dione as a white solid (60 mg, 25%). 1H NMR (CDCl3, 400 MHz): δ(s, 3H), 2.40 (s, 3H), 3.13-3.07 (m, 1H), 3.94-3.93 (d, J=4 Hz, 2H), 4.21-4.19 (t, J=4 Hz, 1H), 5.03 (s, 2H), 6.68 (bs, 1H), 7.87 (s, 1H), 7.99 (s, 1H). The title compound was shown to inhibit hT2R08 bitter receptor and had an IC50 of 3 μM.

Provenance & Evidence