methyl-4-pyrone) as a substrate, the title reactions were carried out with various alkali metal hydroxides. Whereas phenacylation (with KOH or NaOH) and benzylation (with KOH, NaOH, or LiOH) are possible only on the phenolic hydroxyl, benzoylation can be carried out selectively as well as collectively on both the hydroxyl group (in 80% aq EtOH). The results were discussed in terms of the interactive
使用
曲酸(
5-羟基-2-羟甲基-4-吡喃酮)作为底物,用各种碱
金属氢氧化物进行标题反应。苯甲酰化(用 KOH 或 NaOH)和苄基化(用 KOH、NaOH 或 LiOH)只能在
酚羟基上进行,苯甲酰化可以选择性地进行,也可以在两个羟基上共同进行(在 80%
乙醇水溶液中)。根据碱性阳离子与底物的相互作用对结果进行了讨论。