Keto–enol equilibrium: stable tautomers of <i>ortho</i>-, <i>meta</i>-, and <i>para</i>-hydroquinones in large aromatics
作者:Vincent Silber、Christophe Gourlaouen、Romain Ruppert
DOI:10.1039/d4ra02202e
日期:2024.4.10
the 1,4-hydroquinone and 1,4-dihydroxynaphthalene, the stable tautomers for the [4] and [6]helicenes were the aromatic diketones. These experimental results were corroborated by calculations. Additional calculations showed that these tautomeric species were indeed the stable forms of 1,4 and 1,3-hydroquinones when present in larger aromatics, in drastic contrast with 1,2-dihydroxy-aromatics (known as
提出了以1,4-二甲氧基-[6]螺烯衍生物为原料合成[6]螺烯对醌。三溴化硼的去甲基化反应产生了意想不到的结果。分离出二酮互变异构形式,而不是预期的对氢醌。与1,4-氢醌和1,4-二羟基萘相反,[4]和[6]螺烯的稳定互变异构体是芳香族二酮。这些实验结果通过计算得到了证实。额外的计算表明,这些互变异构体确实是 1,4 和 1,3-氢醌存在于较大芳香族化合物中时的稳定形式,与 1,2-二羟基芳香族化合物(称为儿茶酚)形成鲜明对比。