Hydrogen Peroxide → 5-{[(2S)-2-aminopropyl]amino}-3-[(4,6-dimethylpyridin-2-yl)amino]pyridine-2-carboxamide TFA salt

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To a solution of 5-{[(2S)-2-aminopropyl]amino}-3-[(4,6-dimethylpyridin-2-yl)amino]pyridine-2-carbonitrile TFA salt (166 mg, 0.404 mmol) in DMSO (3 ml) were added hydrogen peroxide (35% aqueous solution, 0.053 ml, 0.61 mmol) and sodium hydroxide (4.0 M aqueous solution, 0.32 mL, 1.3 mmol) at 20° C. After 16 hour, the reaction mixture was purified directly by reverse phase HPLC (acetonitrile/water with 0.1% TFA) to give 5-{[(2S)-2-aminopropyl]amino}-3-[(4,6-dimethylpyridin-2-yl)amino]pyridine-2-carboxamide TFA salt. MS ESI calc'd. for C16H23N6O [M+H]+ 315. found 315. 1H NMR (500 MHz, CD3OD) δ 7.81 (s, 1H), 7.59 (s, 1H), 7.10 (s, 1H), 6.90 (s, 1H), 3.72-3.49 (m, 1H), 3.52-3.33 (m, 2H), 2.53 (s, 3H), 2.40 (s, 3H), 1.39 (d, J=6.6 Hz, 3H).

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