Acetic Acid → HCID 178474467, 화합물

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To a suspension of 0.95 g of 2-acetamido-4-hydroxy-6-[2-(4-acetoxycarbonylphenyl)ethenyl]pyrido[2,3-d]pyrimidine in 50 mL of water was added 1N aqueous sodium hydroxide until a homogenous solution was obtained. Acidification with acetic acid resulted in the formation of a yellow precipitate which was collected by filtration. The filter cake was washed sequentially with water, methanol, acetone and ether. The residual solid was recrystallized from DMF to give 0.65 g (77%) of the title compound, which can be alternatively named as 2-acetamido-6-(4-carboxystyryl)-5-deaza-4(3H)-pteridinone, as a microcrystalline yellow solid, mp >300° C.; NMR (TFA-d1) delta 2.5 (s, 3H), 6.85, 7.32 (AB q, 2H, J=12 Hz), 7.45, 8.18 (AB q, 4H, J=9 Hz), 8.65 (s, 1H), 9.02 (s, 1H); IR (Nujol) 3300-2200 (br), 1685, 1655, 1630, 1600, 1565 cm31 1. MS: Calc'd. for C18H14N4O4 : 350. Found: m/e 350 (base), 308.

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