[2-(5-Methyl-3-phenyl-isoxazol-4-yl)-imidazo[1,2-a]pyridin-7-yl]-carbamic acid tert-butyl ester → 2-(5-Methyl-3-phenyl-isoxazol-4-yl)-imidazo[1,2-a]pyridin-7-ylamine

関与物質

反応手順

A mixture of [2-(5-methyl-3-phenyl-isoxazol-4-yl)-imidazo[1,2-a]pyridin-7-yl]-carbamic acid tert-butyl ester (1.0 g, 2.56 mmol) in hydrochloric acid (4 M in dioxane, 29 mL) was stirred at room temperature for 6 h. The precipitate was then filtered off and dissolved in a dilute solution of sodium hydrogen carbonate and then extracted with ethyl acetate. The organic layer was then washed with brine and then dried over sodium sulphate and evaporated to leave a brown foam. Purification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 25:75) afforded the title compound (477 mg, 64%) which was obtained as a light brown foam. MS: m/e=291.1 [M+H]+.

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