Trifluoroacetic acid → 5-[(3-aminopropyl)amino]-3-[(4,6-dimethylpyridin-2-yl)amino]pyridine-2-carboxamide TFA salt

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Reaction Steps

To a solution of tert-butyl {3-[(6-{[bis(4-methoxyphenyl)methyl]carbamoyl}-5-[(4,6-dimethylpyridin-2-yl)amino]pyridin-3-yl)amino]propyl}carbamate (51 mg, 0.080 mmol) in dichloromethane (4 mL) was added triethylsilane (0.064 mL, 0.40 mmol) followed by TFA (0.8 mL) at ambient temperature. After 2 hours, the reaction mixture was concentrated under reduced pressure, and the residue was purified by reverse phase HPLC (acetonitrile/water with 0.1% TFA, linear gradient) to afford 5-[(3-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, DMSO-d6) δ 11.74 (s, 1H), 8.22-8.04 (br s, 1H), 7.92-7.76 (m, 4H), 7.58 (s, 1H), 7.37 (s, 1H), 6.74-6.66 (br s, 2H), 3.22-3.16 (m, 2H), 2.94-2.84 (m, 2H), 2.40 (s, 3H), 2.25 (s, 3H), 1.90-1.82 (m, 2H).

Provenance & Evidence