Triethylamine → (S)-N-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)-2-phenylpropanamide

関与物質

反応手順

1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-amine hydrochloride (Example 4-1a) (200 mg, 1 mmol), (S)-2-phenyl propionic acid (156 mg, 1 mmol), and PyBop (650 mg, 1.3 mmol) were added to DMF (4 mL) followed by triethylamine (0.3 mL, 2.1 mmol). The reaction stirred for 4 hours at room temperature under a nitrogen atmosphere then diluted with ethyl acetate (20 mL), washed with aqueous saturated NaHCO3 solution (2×15 mL) followed by aqueous saturated NaCl solution (15 mL). The organic phase was dried, filtered and concentrated on the rotovap. The crude product was re-suspended in methanol (3 mL) and purified by reversed phase HPLC (5%-95% ACN in H2O: 25 minute gradient). The fractions containing the pure product were concentrated to afford (S)-N-(1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazol-4-yl)-2-phenylpropanamide (200 mg, 60%) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ 1.36 (d, J=7.2, Hz, 3H), 2.09 (s, 3H), 2.36 (s, 3H), 3.71-3.66 (m, 1H), 5.05 (s, 2H), 7.33-7.17 (m, 5H), 7.37 (s, 1H), 7.90 (s, 1H), 10.05 (s, 1H). MS 325 (M+H). Melting point 108° C.-110° C.

情報源と証拠