酮醇，或称α-羟基酮，偶姻，是具有右图所示结构的有机化合物。

酮醇可通过以下途径合成：

• 酮醇缩合反应
• 安息香缩合反应
• Rubottom氧化反应
• MoOPH氧化反应等

还原酮醇得到二醇，氧化酮醇则得到二酮。

In chemistry acyloins are a class of organic compounds which all possess the secondary alpha-hydroxy ketone functional group. Thus, they all contain a hydroxyl group placed on the α-position of a carbonyl group. The named acyloin is derived from the fact that they are formally derived from reductive coupling of carboxylic acyl groups.