Acetic Acid → 2-(5-Bromo-2-fluoro-phenyl)-3H-pteridin-4-one

関与物質

反応手順

A mixture of 3-(5-bromo-2-fluorobenzoylamino)pyrazine-2-carboxamide 103 (2.3 g, 6.78 mmol) and KOH (3.81 g, 67.8 mmol) in H2O (60 mL) and DMSO (20 mL) was stirred at room temperature for 45 min. Acidification to pH 5 (pH paper control) with AcOH followed by addition of 50 mL of ice-cold water afforded a precipitate, which was filtered off, washed with H2O, acetonitrile and ether to give 1.83 g of the title product 104 as a white powder (LCMS analysis).

情報源と証拠