2-Methyl-7-phenylpyrazolo[1,5-a]pyrimidin-5-amine → N-(2-methyl-7-phenylpyrazolo[1,5-a]pyrimidin-5-yl)-2-(pyridin-4-yl)cyclopropanecarboxamide

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Reaction Steps

In a round-bottomed flask was 2-(pyridin-4-yl)cyclopropanecarbonyl chloride (7D, 190 mg, 1.05 mmol) added in Pyridine (2 mL) to give a yellow suspension. 2-methyl-7-phenylpyrazolo[1,5-a]pyrimidin-5-amine (10A, 213 mg, 0.951 mmol) was added portionwise at 0° C. The temperature was slowly raised to room temperature. The reaction was quenched with saturated sodium bicarbonate and partitioned between ethyl acetate and water. The separated organic layer was dried over Mg2SO4, filtered, and concentrated under reduced pressure (3×100 mL). The reaction mixture was filtered and purified by preparatory, 5-95% (10 mM NH4HCO3 (aq)/10 mM NH4HCO3 in 20/80 (v/v) H2O/MeCN). Received 9 mg (3%) of yellow solid. 1H NMR (DMSO-d6) δ: 11.32 (s, 1H), 8.46 (d, J=6.1 Hz, 2H), 7.94-8.06 (m, 2H), 7.88 (s, 1H), 7.53-7.67 (m, 3H), 7.15-7.26 (m, 2H), 6.33 (s, 1H), 2.37 (s, 3H), 1.50-1.66 (m, 2H). ESI-MS: m/z 370.0 (M+H)+.

Provenance & Evidence