Hydrochloric Acid → 1217341-48-4

Participants

Reaction Conditions

Reaction Steps

1-(3-(tert-butyldimethylsilyloxy)benzyl)-3-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)-5,5-dimethylimidazolidine-2,4-dione (Example 12-1a) (2.00 g, 3.82 mmol) was dissolved in methanol (200 mL) and treated with HCl (2.0 M solution in diethyl ether, 10 equivalents). The solution was stirred for 16 hours at 50° C. then allowed to cool down to room temperature and the solvent was removed under reduced pressure. The residue was dissolved in ethanol and recristallized at 4° C. to give 3-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)-1-(3-hydroxybenzyl)-5,5-dimethylimidazolidine-2,4-dione (1.50 g, 3.67 mmol, 96%) as a white solid. 1H NMR (DMSO-d6, 400 MHz): 1.31 (s, 6H), 2.16 (s, 3H), 2.42 (s, 3H), 4.47 (s, 2H), 5.20 (s, 2H), 6.65 (ddd, J=0.8, 2.4, 8 Hz, 1H), 6.79 (m, 2H), 7.11 (t, J=8 Hz, 1H), 7.83 (d, J=0.8 Hz, 1H), 8.21 (d, J=0.8 Hz, 1H), 9.36 (s, H). MS 410 (MH+). The title compound was shown to inhibit hT2R08 bitter receptor and had an IC50 of 0.05 μM

Provenance & Evidence