3-Amino-2-pyrazinecarboxylic acid → 3-Amino-pyrazine-2-carboxylic acid methoxy-methylamide

関与物質

反応手順

To a solution of 3-aminopyrazine-2-carboxylic acid (1 g, 7.2 mmol) in DMF (15 ml) is added EDC hydrochloride (1.7 g, 8.6 mmol), HOBt (1.16 g, 8.6 mmol), diisopropylethylamine (3.08 ml, 18 mmol) and N-methoxy-N-methylamine hydrochloride (0.84 g, 8.6 mmol), and the resulting solution is stirred at room temperature for 15 hours. The reaction is concentrated in vacuo, and sat. aq. NaHCO3 (50 ml) is added to the residue. The product is extracted into EtOAc (3×60 ml), washed with sat. aq. NaCl (2×50 ml), dried (MgSO4) and concentrated in vacuo to afford a yellow residue. Purification by flash chromatography (SiO2, 0-5% MeOH in DCM) yields 3-amino-pyrazine-2-carboxylic acid methoxy-methylamide as a yellow solid.

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