Hydrochloric Acid → n-(Piperidin-4-yl)-7-(1-(4-(trifluoromethyl)phenyl)piperidin-4-yloxy)imidazo[1,2-a]pyridine-2-carboxamide dihydrochloride salt

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Reaction Steps

A mixture of tert-butyl 4-(7-(1-(4-(trifluoromethyl)phenyl)piperidin-4-yloxy)imidazo[1,2-a]pyridine-2-carboxamido)piperidine-1-carboxylate (0.13 g, 0.22 mmol) and 4N hydrochloric acid in dioxane (2 mL) was stirred at room temperature for 1 h. The reaction mixture was concentrated and washed with diethyl ether (2×3 mL) and then dried under reduced pressure to afford N-(piperidin-4-yl)-7-(1-(4-(trifluoromethyl)phenyl)piperidin-4-yloxy)imidazo[1,2-a]pyridine-2-carboxamide dihydrochloride salt as a brown solid (0.13 g, 98%). 1H NMR (CD3OD, 300 MHz) δ 8.72 (m, 1H), 8.56 (m, 1H), 7.64 (m, 2H), 7.45 (m, 2H), 7.31 (m, 1H), 7.26 (m, 1H), 4.97 (m, 1H), 3.64 (m, 5H), 3.01 (m, 2H), 2.14 (m, 10H) ppm; MS (ES) 488.1 (M+1).

Provenance & Evidence