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

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tert-Butyl 4-(2-(3-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-ylcarbamoyl)imidazo[1,2-a]pyridin-7-yloxy)ethyl)piperazine-1-carboxylate (0.04 g, 0.1 mmol) was dissolved in methanol and treated with concentrated hydrogen chloride. This mixture was stirred at ambient temperature for 2 hours before concentrating and drying under high vacuum overnight to give N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)-7-(2-(piperazin-1-yl)ethoxy)imidazo[1,2-a]pyridine-3-carboxamide as a white solid (38 mg). MS (APCI), positive scan, m/z=539.1 (M+).

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