Trifluoroacetic acid → (6-methoxy-3-oxopyrido(2,3-b)pyrazin-4(3H)-yl)acetaldehyde

Participants

Reaction Steps

To 0.21 g of 4-(1,3-dioxolan-2-ylmethyl)-6-methoxypyrido(2,3-b)pyrazin-3(4H)-one, 10 mL of an 80% aqueous trifluoroacetic acid solution was added, and the mixture was stirred at room temperature for 5 hours and then left overnight. The solvent was distilled off under reduced pressure. The resultant residue was charged with ethyl acetate and water and adjusted to pH 7.0 with a 1 mol/L aqueous sodium hydroxide solution. The organic layer was separated, and the aqueous layer was extracted with ethyl acetate. The organic layer and the extract were combined, the resultant solution was dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure to obtain 0.18 g of (6-methoxy-3-oxopyrido(2,3-b)pyrazin-4(3H)-yl)acetaldehyde as a light brown foam.

Provenance & Evidence