Dimethylformamide → 1-Cyclopentyl-3-ethyl-6-(3-ethoxy-4-pyridyl)pyrazolo[3,4-d]pyrimidin-4-amine

関与物質

反応手順

To a mixture of 1-cyclopentyl-3-ethyl-5-amino-1H-pyrazole-4-carboxamide (2.0 g, 9.0 mmol), DMF (30 ml), and 3-ethoxy-4-cyanopyridine (1.47 g, 9.9 mmol) under argon was added sodium hydride (0.43 g, 10.8 mmol). The mixture was stirred at room temperature for 24 hours and the solvent was removed in vacuo. The residue was treated with water, acidified with acetic acid and a precipitate formed which was collected by filtration. The residue was purified by column chromatography on silica eluting with ether (100%) to acetone (100%) to afford 1.4 g (44%) of 1-cyclopentyl-3-ethyl-6-(3-ethoxy-4-pyridyl)pyrazolo[3,4-d]pyrimidin-4-amine.

情報源と証拠