Hydrochloric Acid → 3-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-N-((5-fluoro-4-isopropyl-6-methyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-2-methyl-5-(6-(piperazin-1-yl)pyridin-3-yl)benzamide formate

Participants

Reaction Steps

To a solution of tert-butyl 4-(5-(3-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-5-(((5-fluoro-4-isopropyl-6-methyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)carbamoyl)-4-methylphenyl)pyridin-2-yl)piperazine-1-carboxylate (450 mg, 0.639 mmol) in ethanol (4.3 mL) at room temperature was added 4 M HCl in dioxane (2 mL, 8.00 mmol). LC/MS after 2 h showed both product and remaining starting material. Additional 4 M HCl in 1,4-dioxane (1.5 ml, 6.00 mmol) was added, and LC/MS after total 4 h showed that reaction was completed. The reaction mixture was concentrated to dryness, azeotroped with toluene-methanol to give crude hydrochloride salt (454 mg, 111%). A 125 mg sample of crude hydrochloride salt was purified by reverse phase HPLC/MS (ACN—H2O, 0.1% formic acid) to give 3-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-N-((5-fluoro-4-isopropyl-6-methyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-2-methyl-5-(6-(piperazin-1-yl)pyridin-3-yl)benzamide formate (65 mg) as a colorless glassy film. 1H-NMR (400 MHz, CD3OD) δ ppm 8.35-8.40 (m, 2H), 7.86 (dd, J=2.4, 8.8 Hz, 1H), 7.42 (d, J=1.6 Hz, 1H), 7.27 (d, J=1.6 Hz, 1H), 6.99 (d, J=8.8 Hz, 1H), 4.54 (s, 2H), 3.92 (m, 2H), 3.84 (m, 4H), 3.54 (m, 1H), 3.30-3.38 (m, 6H), 3.07-3.18 (m, 3H), 2.33 (s, 3H), 2.24 (d, J=2.8 Hz, 3H), 1.73-1.76 (m, 2H), 1.62-1.68 (m, 2H), 1.37 (d, J=6.8 Hz, 6H), 0.89 (t, J=6.8 Hz, 3H); MS (ES)(M+H) 605.6.

Provenance & Evidence