Small-Ring Compounds. XXV. Phenylcyclobutadienoquinone and Related Compounds<sup>1</sup>
作者:Edgar J. Smutny、Marjorie C. Caserio、John D. Roberts
DOI:10.1021/ja01492a061
日期:1960.4
concentrated sulfuric acid has led to the formation of phenylcyclobutene-1,2-dione(phenylcyclobutadienoquinone). This compound proved to be quite stable and displayed some unusual properties. A number of its substitution products have been prepared and their properties are described. Of these, 4-hydroxy-3-phenylcyclobutene-1,2-dione was of special interest in being a remarkably strong acid with pK_a of 0
将苯乙炔热加成到三氟氯乙烯和四氟乙烯中,然后用浓硫酸水解任一产物,导致形成苯基环丁烯-1,2-二酮(苯基环丁二烯醌)。事实证明,这种化合物非常稳定,并显示出一些不寻常的特性。已经制备了许多其替代产品并描述了它们的特性。其中,4-羟基-3-苯基环丁烯-1,2-二酮特别令人感兴趣,因为它是一种非常强的酸,pK_a 为 0.37。讨论了苯基环丁二烯醌的稳定性和 4-羟基衍生物的酸强度,并将其与通过 LCAO 方法计算的离域能相关联。