Sodium Carbonate → N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)-7-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)imidazo[1,2-a]pyridine-3-carboxamide

関与物質

反応条件

反応手順

7-Bromo-N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamide (0.05 g, 0.12 mmol) was dissolved in dimethoxyethane:dimethylformamide (1:1, 0.8 mL) in a 2 dram vial, and 1-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one (0.04 g, 0.17 mmol), PdCl2(dppf)*dcm (0.005 g, 0.006 mmol), and 2 M sodium carbonate (0.17 mL, 0.34 mmol) were added. Nitrogen was bubbled through the reaction mixture for 5 minutes before capping the vial and heating in a sand bath at 90° C. overnight. The reaction mixture was diluted with ethyl acetate and water. A greenish precipitate formed and was collected. The crude material was purified by preparatory thin layer chromatography (silica, 20×20 cm, 0.5 mm) developed in a chamber with 10% MeOH/DCM. The UV active band with Rf=0.1 was isolated and the silica washed with 10% MeOH/DCM. The filtrate was concentrated to give N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)-7-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)imidazo[1,2-a]pyridine-3-carboxamide as a beige solid (31 mg).

情報源と証拠