反应详情

1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-amine hydrochloride (Example 4-1a) (300 mg, 1.3 mmol), 2-phenylpropanoic acid (225 mg, 1.5 mmol), triethylamine (300 mg, 3 mmol), DMAP (61 mg, 0.5 mmol), and EDC (386 mg, 2 mmol) were stirred together in DCM (10 mL) at room temperature for 4 hours. The reaction mixture was diluted with aqueous 1N HCl (100 mL) and extracted with DCM (3×, 75 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated on the rotovap. The residue was purified by silica gel chromatography (30% ethyl acetate in hexanes) to afford N-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)-2-phenylpropanamide (272 mg, 81%) as a white solid. 1H NMR (CDCl3, 400 MHz) δ 1.36 (d, 3H, J=7.2 Hz), 2.10 (s, 3H), 2.37 (s, 3H), 3.70 (m, 1H, J=6.8 Hz), 5.06 (s, 2H), 7.20 (t, 1H, J=8.4 Hz), 7.31-7.28 (m, 4H), 7.38 (s, 1H), 7.91 (s, 1H), 10.10 (s, 1H). LC/MS; [M+H] calculated for C18H20N4O2; expected 325.16; found 325.5. Melting point: 129-130° C.

1. extractionextracted with DCM (3×, 75 mL)
2. dry with materialThe combined organic extracts were dried over sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated on the rotovap
5. customThe residue was purified by silica gel chromatography (30% ethyl acetate in hexanes)