The known compound, reported in the literature to be 4-acetoxypyridine, is shown to be N-acetyl-4-pyridone. In solution the two isomers are in equilibrium. 4-Pyridone is acetylated by acetic anhydride more rapidly and more completely than is 2-pyridone.

中文翻译：

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4-乙酰氧基吡啶和N-乙酰基-4-吡啶酮之间的平衡；改正文学

文献中报道为4-乙酰氧基吡啶的已知化合物显示为N-乙酰基-4-吡啶酮。在溶液中，两种异构体处于平衡状态。与2-吡啶酮相比，4-吡啶酮被乙酸酐乙酰化的速度更快，更完全。