Hydrochloric Acid → 3-(3-Methoxy-6-oxopyrido[2,3-b]pyrazin-5(6H)-yl)propanal

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

5-[2-(1,3-Dioxolan-2-yl)ethyl]-3-methoxypyrido[2,3-b]pyrazin-6(5H)-one (397 mg, 1.43 mmol) was dissolved in tetrahydrofuran (15 ml). To the solution was added a 1N hydrochloric acid aqueous solution (5 ml) under cooling on ice and the mixture was stirred at room temperature for two and a half hours and at 50° C. for 4 hours. After cooling in the air, the solvent was removed under reduced pressure and the residue was alkalized by adding saturated sodium bicarbonate water under cooling on ice. The resultant was extracted with dichloromethane, the extract was dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure to yield 292 mg (87%) of the title compound in the form of a yellowish solid.

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