Hydrochloric Acid → N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)-7-(piperidin-4-yl)imidazo[1,2-a]pyridine-3-carboxamide Tri-hydrochloride

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Reaction Steps

tert-Butyl 4-(3-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-ylcarbamoyl)imidazo[1,2-a]pyridin-7-yl)-5,6-dihydropyridine-1(2H)-carboxylate (Example 51; 0.037 g, 0.064 mmol) was dissolved in 6 mL of methanol and 1.3 mL of 6N HCl in isopropyl alcohol. 10% Pd/C (0.075 g) was added and the mixture hydrogenated under a balloon of hydrogen for 2 hours. Celite was added and the mixture was then filtered through GF/F filter paper and the filtrate concentrated under reduced pressure. The crude material was purified by reverse phase chromatography, followed by treatment of the isolated material with 4M HCl/dioxane to provide the title compound (17% yield). MS (APCI), positive scan, m/z=480.3 (M+H).

Provenance & Evidence