Phosphorus oxychloride → 2,5-Dichloropyrido[3,4-b]pyrazine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A suspension of 5-chloropyrido[3,4-b]pyrazin-2(1H)-one (0.57 g, 3.14 mmol) in phosphorus oxychloride (10.24 mL, 110 mmol) was stirred at 110° C. for two hours, and then concentrated. The residue was dissolved in DCM, washed with saturated sodium bicarbonate, dried over anhydrous sodium sulfate, filtered, and concentrated to afford the title compound (580 mg, 2.90 mmol). MS m/z=200 (M+H).

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