反应详情

1-(3-chloropropyl)-3-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)urea (example 9-5b) (200 mg, 0.64 mmol) and 60% sodium hydride (28 mg, 0.71 mmol) in DMF (2 mL) were stirred at 0° C. for 15 minutes then allowed to warm up to room temperature and stir for 2 hours. The reaction was quenched with methanol and concentrated. The reaction was diluted with brine (50 mL) and extracted with dichloromethane (2×, 50 mL). The combined organic extracts were dried over magnesium sulfate, filtered and concentrated. The residue was taken up in dichloromethane (5 mL) and purified by silica column chromotography (100% to 90% dichloromethane in methanol:30 minute gradient) to afford 1-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)tetrahydropyrimidin-2(1H)-one (84 mg, 48%) as a white solid. 1H NMR (DMSO-d6, 400 MHz)): δ1.85-1.91 (m, 2H), 2.10 (s, 3H), 2.37 (s, 3H), 3.12 (m, 2H), 3.48 (t, J=6.0 Hz, 2H), 5.05 (s, 2H), 6.57 (s, 1H), 7.46 (s, 1H), 7.80 (s, 1H). LC/MS; [M+H] calculated for C13H17N5O2; expected 276.14. found 276.10.

1. customThe reaction was quenched with methanol
2. concentrationconcentrated
3. additionThe reaction was diluted with brine (50 mL)
4. extractionextracted with dichloromethane (2×, 50 mL)
5. dry with materialThe combined organic extracts were dried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. custompurified by silica column chromotography (100% to 90% dichloromethane in methanol:30 minute gradient)